Sa612 Receiver

Even with a shitty mixer like the SA612 the nano still achieves superior performance. Audio splitter. An even newer version is the SA612 and is also fully compatible with better filtering and noise suppression, it just has less gain at 45MHz. Jean-Marc's crystal-controlled QRP tranceiver is a design by F6BCU. The transceiver uses a SA612 in a Direct Conversion receiver, and takes the 612 oscillator output to drive the transmitter. ) Last minute substitution of 10MHz crystals for the 10. Ted, KX4OM reminded us of the SSB6. 2 Corrected some spelling mistakes. Buy Hand Cleaner & Soap - Bottle, 3 L SA612. Tons of extra harmonics but thats to be expected with no filtering. to 30,000 gal. Active 7 months ago. They are not too critical so I used the nearest preferred values. Little changed in the Signetics and Philips designs. Install the following parts: Socket for U3, and U3 (SA612) Socket for U4, and U4 (NE5532) C16 through C23 D3 and D4 R2, R3, R4, and R7 Y4 Make sure that the temporary jumper from the base of Q6 (leftmost hole) to the top hole for C36 is still in place (you installed it for lesson 5). This circuit has not been tested but a very similar circuit was successfully built for a recent A2 project. The amplitude of oscillation is set by resistors R1, R2 and R3. 875", With (2) 5‐HP Aqueous Ammonia Pumps, Valves & Piping FORCED DRAFT FAN. I reused the code and circuit blocks from a lot of previous. The module board is designed as a 9MHz I/F SSB and CW demodulator, and uses a SA612 Gilbert Cell Mixer to demodulate the 9MHz I/F down to a filtered audio output. Updated schematic. The project required the use of. AngularJS is what HTML would have been, had it been designed for building web-apps. I was wondering if a 191 would work in this simple application which uses a 1n5711, Amazing All-Band Receiver, the schematic is just a click down the page it is an all band receiver I would like to use for EMI testing. High performance communications receivers Single conversion VHF/UHF receivers SCA receivers RF level meter Spectrum analyzer Instrumentation FSK and ASK data receivers Log amps Wideband low current amplification 4. Total board space for the total application is 2 x 4 cm. Mixer conversion gain is somewhere in between 14 and 19 db. 059-MHz crystal, and for the receiver detector. The output filter of the PA is inline with the receiver antenna line during receive period, and this is beneficial in adding additional selectivity at the input to the receiver. 0 Volts because of the Zener diode. Covington Created Date: 1/25/2009 5:06:23 PM. The SE612 mixer was really meant for low-signal receiver mixing, not high-level transmitter mixing. 192 MHz because there are many quartz crystal resonators on the market whit that frequency. 5uH Inductors 2 Q1, 2 J309 TO92 1 Galileo2-0914S Single Sided PCBoard 1 Metal Case Project Box. Wideband Receiver Works! February 12, 2011 Scott Leave a comment General I demonstrated earlier this week that I can generate a wide range of frequencies using a tank circuit and the oscillator in a SA612. In fact, this constitues a single chip TX with an output of a few hundred microwatts. В каскадах УПЧ вместо пары 2SK241 можно применить один BF998. With simple. But even with an external antenna (12m wire) and a tuner in between the output volume is too low. After some hamradio antenna updates I use now R-7000 GP for receiving DRM. Entradas. Identify how the noise is coupled into the receiver. Entradas Digitais para uso Industrial. @@ -1 +1,14 @@ This is code I recovered from around December 2014. SA612 NXP Data Sheet. When you mix, you get the sum and the difference of the frequency components from each input. thank you regards. General description The SA612A is a low-power VHF monolithic double-balanced mixer with on-board oscillator and voltage regulator. Zibo Tanglian lined storage vessel receiver with from tanglian factory TanglianTank&Vessel&Receiver. Classic 40 is a high-dynamic- range, high-fidelity direct-conversion receiver for the 40-meter band. SA612 - Free download as PDF File (. This is a single chip superhet receiver with an intermediate frequency of zero Hertz. But we'd have less output at 7 MHz. MIDDLE: the orientation of the MV209 varactor is the flat side to the band module. Little changed in the Signetics and Philips designs. The receiver circuitry as presented here can be built for less than $50. Zener diode ZD3 provides a stabilized 6. NE602AN RF Amp , Oscillator and Mixer for sale. The 50MHz RF & mixer stage is an SA612 integrated circuit followed by a 2N3904 post mixer amplifier at 28 MHz. From 2009-2010, Make: had the pleasure of hosting a series of ham radio articles by fashion designer, hardware hacker, and ham radio enthusiast, Diana Eng. Der fertig aufgebaute Bausatz. First receiver I was ever built for HF was tube receiver without RF amplification called OV2. The noise is not detected when the SA612 mixer frontend is connected to the Raspberry Pi, which is our suspected noise source. The Mixer used in this receiver is Philips SA612. HA16852MP : Optical Communication Receiver/amplifier. The electrical circuit as it described below in the manual is intended for 14. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, VOL. @@ -1 +1,14 @@ This is code I recovered from around December 2014. The ability of the mixer to handle a wide dynamic range of RF inputs signals are limited, and therefore usually not desirable. This circuit has not been tested but a very similar circuit was successfully built for a recent A2 project. Performance was very good for its simplicity, but, the local station, totally blocked my receiver. sa612 pdf Should download the 602 mixer data sheet - 109K which is in PDF format. This is really great that your doing this. The (fully differential) mixer offers some 18 dB gain. 582 MHz PAL colour burst crystal) Simple Local oscillator isolation Reasonable sensitivity Signal range? Small Useable with a computer SA612 (NE612) (Mixer & oscillator) + LM386 'Neophyte', 'Sudden', 'MRX-80', 'Warbler'. pdf), Text File (. Turn the receiver off, and then on at any time and temperature, the BFO frequency is exactly the same. The toggle switch removes the inductor and lets the 7. The incoming 518kHz NAVTEX signal is is mixed with the local oscillator at 516. SA650H - Headset Mono 95 kHz SA652H Double Emitter Power Supply SA611 - Emitter, Small Area SA612 - Emitter, Standard Area SA613 - Emitter, Large Area. It is basically a direct conversion receiver, basically a superhet where the intermediate frequency is zero, ie the conversion is straight from RF to AF. An Antenna Impedance Meter for the High Frequency Bands When SWR isn’t enough — here’s a tool that you can build. Output of this circuit is designed to drive an SA612 Audio Detector. The MeSquares were equally awsome for rapid building. Now suppose the VXO will be tuned down a few kHz (to about 25 kHz max. Thank you for purchasing my general coverage receiver kit. But we'd have less output at 7 MHz. With simple. かなり以前から、ebayやaliに気になるキットが出ている。youtubeにも色々投稿されている。それは6BAND6. Thanks for commenting a lot in the code. As a result of high sensitivity of the Product Detector, the gain of the receiver from antenna connector to the detector input, is not necessary to be very high, improving in this way the overall receiver linearity and noise floor. Schematic is posted but there were some last minute changes for the Buildathon kits: a. * Can of course be used by any receiver that has a 455kHz MF you can tap. You only need to add these items if you want to monitor the local oscillator frequency with and external frequency counter. A 40 meter QRP-Transceiver - This was one of my very first transceiver developments. 40m or 80m Regen RX by G3XBM The regen receiver is an amazing piece of electronics. The (fully differential) mixer offers some 18 dB gain. 5 to 18 MHz range. Only the MC1350P is included with the kit. The mixer we used is a Philips SA612 Mixer chip, along with various other necessary external components (inductors, capictors, etc. Most have been regenerative receivers or receivers with Q multipliers, perhaps this is the mitigating factor. The EMRFD receiver design has slightly different component values for the tuned circuit at the receiver front end than the Micromountaineer 40 meter values here. 1975 Penfold 3. But even with an external antenna (12m wire) and a tuner in between the output volume is too low. DIY SA612 + RTL-SDR HF receiver: good on laptop, but huge wideband noise on Raspberry Pi. Public Projects:4 Libraries:7. Czu³o¶æ SA612 -112dBm 12db SINAD. LED_DRIVER. Other features of the receiver. availability of tapped inductors. The circuit employs the 8 pin Signetics balanced mixer IC (NE602) which converts the incoming RF signal to the standard 455 Khz IF signal and provides about 13dB gain. I Googled “wwvb kits” and came up with the following: WWVB NIST Radio Time Receiver Kit WWVB Chiming Clock Kit WWVB 60 kHz Time Receiver Module with Antenna Unfortunately, all of these kits use a little […]. 5KHz Crystal Filter, receives CW, LSB, USB, AM To make a complete general coverage receiver, you will need 3 boards, a DDS VFO Kit, LCD Display, and a Receiver kit (GCRX) The design is relatively straightforward. frequency out of the SA612 mixer chip. Advanced SW receivers Q-Multiplier – Babani 2. Mixer ratings put the IP3 maximum at -15 dbm which comes out to about 40 mV p-p at the input. No switch was provided for removing the preamp from the circuit as the RF gain works quite well to reduce receiver gain whenever appropriate. Ke- member that the output of a mix- er is the sum and difference of Osc 500 mhz buy on Elcodis. 192 MHz because there are many quartz crystal resonators on the market whit that frequency. but i m not sure how can mix them using sa612. 5 MHz: Superhet Receiver: This idea presents a simple circuit for a superhet radio receiver that can be built up in sections, with each section tested before assembly. The receiver section is direct conversion using the popular NE612 (SA612/SA602/NE602) mixer and LM386 audio amplifier. sa612 material SA-612high water pressure resistant. SA612 можно заменить на аналоги. On completion of your purchase a link to your download is instantly available in your account. Being a ham operator I'm always on the lookout for new radio related projects. is the local oscillator. 01 µF capacitor to ground filters out the high frequency component (the. The file "NE602 Rx. The SA602A is a Gilbert cell, an oscillator/buffer, and a temperature compensated bias network as shown in the equivalent circuit. 1975 Penfold 3. Second, connect the 12 Volt power supply to the Radiono, but do not turn it on yet. NE612=NE602 =SA612 MIX/OSC. This technique is called direct conversion (DC). - Converter for reception signals of a very low frequencies, using a short wave HAM receiver (transceiver) - This design uses a very popular low cost mixer SA612 (alternatively NE602) in DIP (DIL) package and a few other components. I was able to clean this noise up quite a bit by adding two additional clip-on ferrite rings to the output cable of the power brick. The overall effect of this was to make the SDR receiver seem pretty deaf to desired signals. R5, the sidetone pathway across the receiver's muting transistor, Q1, was removed and not. The SA602 chip is a mixer with a built-in local oscillator. I changed the original designs to be able to use LM358 audio IC amplifier. radio kits in ja 信州の田舎発ラジオ工作(自作とキット)中心blogです。 トランジスタラジオキット,真空管短波ラジオ(自作)、真空管レフレックスラジオ、自作amワイヤレスマイク、fmワイヤレスマイク(真空管)、ダイレクトコンバージョンキット製作、 lc7265表示器など計 360例。. The SA612 Mixer is powered at 6. You only need to add these items if you want to monitor the local oscillator frequency with and external frequency counter. The NE602 through the SA612 series are all virtually identical Gilbert cell-based integrated circuits. The Receiver SA612: Make a few measurements of your choice to characterize your receiver-side SA612 and to verify that it is working properly. Receiver Design Fixed frequency (3. Distribution Accessories Receiver Accessories Batteries for SA650 Series Receivers SA601F Single Channel Infrared Transmitter PS24 - Emitter Power Supply SA650HX - Headset Mono 250 kHz SA650H - Headset Mono 250 kHz SA611 - Emitter, Small Area SA612 - Emitter, Standard Area SA613 - Emitter, Large Area SA652P - Pendant Receiver Stereo SA1502P. A recent news story about the 50th anniversary of WWVB got me to thinking about building my own WWVB receiver. When 4SQRP brought out a version of the David Cripe NM0S-designed Hi-Per-Mite Filter, I noticed that it could be configured to give up to 50dB of gain. There is a high power of noise relative to the power of the desired signal (i. Local Oscillator frequency is 24 MHz, using the built-in SA612 LO driver. The SA602, SA612, and NE602 are virtually identical. Some investigation with my old Racal-Dana Universal Counter Timer revealed that the VFO was being pulled by such strong signals. 5 KOhms in parallel with about 2 pFd. The resistor R1, therefore, is the current limiting resistor to protect the Zener D3. With simple. The NE602 ( SA612 etc. the WWV receiver. Mixer ratings put the IP3 maximum at -15 dbm which comes out to about 40 mV p-p at the input. 1975 Penfold 3. It covers 1 IC1 NE602 NE602A NE602 or SA612, 8 pin IC 1 C6 50pF brn Trimmer. It needs to be 24 MHz or slightly higher. This is a common problem with trying to use switching power supplies in the ham shack. The receiver section is direct conversion using the popular NE612 (SA612/SA602/NE602) mixer and LM386 audio amplifier. 5) Select the component "SA612" and drop it into your schematic. 80 Metre DSB Transceiver - The receiver is quite sensitive and tunes about 80-90Khz, tx output is ~300-500mW __ Designed by John Price VK3AJG. Follow Message. The balanced output. SA602A NXP Data Sheet. 350MHz upper single side band receiving of amateur radio transmissions. Se, ad esempio, il quarzo dell'UpConverter è da 125 Mhz, allora qui si imposta -125 000 000. Ne602 Vs Sa602. 5uH Inductors 2 Q1, 2 J309 TO92 1 Galileo2-0914S Single Sided PCBoard 1 Metal Case Project Box. Jean-Marc's crystal-controlled QRP tranceiver is a design by F6BCU. There are four different versions of this chip NE602, NE612, SA602 and SA612. The board consists of the following components: – LO first oscillator realized by U2 – SI570 (570CAC000141DG), 3 switchable low pass filters: 10. Recommend Projects. Receiver bandpass filters, RF preamp, mixer, IF amplifier, detector, audio. Vad vill du digitalisera?. • Direct conversion (Zero I. The receiver is tuned by varying the frequency of the L. This is a single chip superhet receiver with an intermediate frequency of zero Hertz. 8MHz band pass filter with molded RF chokes leads to a SA612 mixer oscillator. ARDF Receiver 3. Na pocz±tku lat 90tych kiedy wiêkszo¶æ uk³adów SSB oklepana by³a na uk³adach UL1024 ja zastosowa³em w moim homemade SA612 (NE612) i stwierdzi³em ¿e to jest to. The receiver uses SA612 mixers, so it won't be like a K3 or Orion etc. The transceiver uses a SA612 in a Direct Conversion receiver, and takes the 612 oscillator output to drive the transmitter. かなり以前から、ebayやaliに気になるキットが出ている。youtubeにも色々投稿されている。それは6BAND6. Wind 2 turns using the 30 GA red wire and 6 turns using the 30 GA green wire on a BN-43-2402 binocular ferrite. Sa612 Receiver Sa612 Receiver. High performance communications receivers Single conversion VHF/UHF receivers SCA receivers RF level meter Spectrum analyzer Instrumentation FSK and ASK data receivers Log amps Wideband low current amplification 4. NE612=NE602 =SA612 MIX/OSC. Building the Splinter II v2 QRPp Receiver-Transmitter kit Thank you for purchasing your Breadboard Radio “Splinter II” QRPp receiver-transmitter kit. The thing hanging off the left side is an FTDI FT232R serial to USB module that I was using to program the microcontroller. A regenerative receiver can receive CW if it’s adjusted to oscillate and isn’t much more complex than this transmitter. You only need to add these items if you want to monitor the local oscillator frequency with and external frequency counter. Output of this circuit is designed to drive an SA612 Audio Detector. The NE602 through the SA612 series are all virtually identical Gilbert cell-based integrated circuits. sa612 material SA-612high water pressure resistant. It may be modified to export mixer output and local oscillator output (this can be ommited). So after completing the entire assembly and while testing the receiver the IC 74HC4053 can be removed from the base and jumpers can be used to the respective pins on the IC base like 4-3, 15-1 & 14-13. Mixer ratings put the IP3 maximum at -15 dbm which comes out to about 40 mV p-p at the input. 47 cap going to the 10 ohm resistor on the LM386 output. The ability of the mixer to handle a wide dynamic range of RF inputs signals are limited, and therefore usually not desirable. I did not use a crystal that was used in the original design and used my homebrew signal generator instead. The addition of TC1 and L1, enables the frequency to be ‘pulled’ slightly, in order to put the transmitter exactly on the 1500Hz marker in Spectran. I used an USB-frequency oscilator to shift the incoming frequency up by 28. Add-on Q-Multiplier Practical Wireless Oct. Install the following parts: Socket for U3, and U3 (SA612) Socket for U4, and U4 (NE5532) C16 through C23 D3 and D4 R2, R3, R4, and R7 Y4 Make sure that the temporary jumper from the base of Q6 (leftmost hole) to the top hole for C36 is still in place (you installed it for lesson 5). The mixer we used is a Philips SA612 Mixer chip, along with various other necessary external components (inductors, capictors, etc. No switch was provided for removing the preamp from the circuit as the RF gain works quite well to reduce receiver gain whenever appropriate. This time I investigated the properties of direct conversion receivers using the cheap and widely available NE612 balanced mixer IC. The BFO trimmer C24 was adjusted so that white noise was visible up to 3000Hz on the waterfall. The Mixer used in this receiver is Philips SA612. frequency out of the SA612 mixer chip. I Googled “wwvb kits” and came up with the following: WWVB NIST Radio Time Receiver Kit WWVB Chiming Clock Kit WWVB 60 kHz Time Receiver Module with Antenna Unfortunately, all of these kits use a little […]. The mixer circuit I decided to start with in my receiver is a simple direct conversion mixer based on the popular SA612. asc" in the schematic editor. All seems to be working well, although only tested up to 50Mhz until I build the Si5351 module. The FunCube Dongle Pro edition (here, FCD) gives unlimited access to the frequency range 64 to 1,700 MHz for reception of all modes. Sample rate Questo comando determina la larghezza di banda. Subject: [QRPLabs] NE602/SA612 minimum specs To: [email protected] The filter formed by the 21. Sa612 radio Sa612 radio If transformer 455khz The most common home brew receiver part = the LM386 audio amplifier. I will have a look around through my notes as I designed a receiver for 6m band a few year back using the SA612, more modern equivalent of the SA602. I was able to clean this noise up quite a bit by adding two additional clip-on ferrite rings to the output cable of the power brick. The 10 turn potentiometer spans about 80kHz providing an easy tuning rate on what is a relatively narrow band. This simple speech processor is suited for all Atlas 210-215 types. The SA612A is a low-power VHF monolithic double-balanced mixer with on-board oscillator and voltage regulator. 1 transceiver, which employs a tuneable SSB filter with tuning diodes in place of the capacitors in a min-loss configuration. Ne612 ssb Ne612 ssb. NE602AN RF Amp , Oscillator and Mixer for sale. HA16852MP : Optical Communication Receiver/amplifier. A bit more tuning around during the CW Sweepstakes 2013 with the Homebrew Broadband SA612 receiver. Receiver design for 20. The board consists of the following components: – LO first oscillator realized by U2 – SI570 (570CAC000141DG), 3 switchable low pass filters: 10. 5 kHz of bandwidth. Of course when we can find a PCB designer for this project all sections of the receiver could be on the same PCB. Unfortunately the only modern schottkys I have are rectifier shottkys used in high power low loss rectification and switching. Ordering information 4. Local Oscillator frequency is 24 MHz, using the built-in SA612 LO driver. A 40 meter QRP-Transceiver - This was one of my very first transceiver developments. There is FM broadcast bleeding through (probably after the mixer). 7MHz IF for FM receivers that a standard IF transformer can be used. at which point the losses become excessive and brass slugs are used. Currently FRG-100 is main receiver for DRM now, and it has made very well job almost over one year. The C with a value of 68 pF in the schematic must be absorbed int the filter input circuit. The receiver uses the superheterodyne scheme of the receiver whit the IF frequency of 8. Philips SemiconductorsProduct specificationSA612ADouble-balanced mixer and oscillator21997 Nov 07853-0391 18662DESCRIPTIONThe SA612A is a low-power VHF monolithic double-balanced mixerwith on-board oscillator and voltage regulator. The resistor R1, therefore, is the current limiting resistor to protect the Zener D3. Communica is a wholesale and retail distributor of semiconductors, electromechanical and passive electronic components for automotives, electronics, electrical, automation, mining and process control industries and technical and tertiary educational institutions. Marty KN0CK sent me some details to publish about his great looking miniature HF upconverter board for the RTLSDR, the HF Alchemy DVB-T Active HF Upconverter. SA612 NXP Data Sheet. 01 µF capacitor to ground filters out the high frequency component (the. The IF filter is a 5-crystal ladder filter with 2. It uses a LC resonant with a hand wound transformer and a trim capacitor to create a band pass filter at about 7MHz, the 40M band. LO board provides all oscillator signals needed for signal conversion and mixing. 374 MHz/24 kHz/ - RX2 - 73. does not have an R. At the IF a sharp band-pass filter (e. How simple can it be? If you are a minimalist and like to mess with small electronics projects then you should meet the SA602 chip. Which is a little more than needed by the SA612, but it can be attenuated with simple resisters if needed. The receiver uses the superheterodyne scheme of the receiver whit the IF frequency of 8. The transceiver uses a SA612 in a Direct Conversion receiver, and takes the 612 oscillator output to drive the transmitter. General coverage receiver kit. The (fully differential) mixer offers some 18 dB gain. Sounds to me like the front end of a receiver. The Belka-DSP radio receiver is designed to receive radio stations with amplitude, frequency and single-band modulation, as well as telegraph signals at short waves in the frequency range 3. And keep the audio stage and HF part separate. В каскадах УПЧ вместо пары 2SK241 можно применить один BF998. 01 µF capacitor to ground filters out the high frequency component (the. SA612 or SA612A should make a good, low-power SSB or CW detector. The RX path then starts from K1 through the auto-transformer U2 and pre-amplifier stage Q8 into the first mixer IC1. The filter method is the traditional SSB reception method in analog superhet receivers. 047 vs the. ON1DHT's 50 MHz Converter Look under "Wireless" in his index on the left side of his home page. asc" is a basic receiver implemented with this model. It covers 1 IC1 NE602 NE602A NE602 or SA612, 8 pin IC 1 C6 50pF brn Trimmer. Support Hours: Monday - Friday 7:30 AM to 4:00 PM Pacific Time. radio kits in ja 信州の田舎発ラジオ工作(自作とキット)中心blogです。 トランジスタラジオキット,真空管短波ラジオ(自作)、真空管レフレックスラジオ、自作amワイヤレスマイク、fmワイヤレスマイク(真空管)、ダイレクトコンバージョンキット製作、 lc7265表示器など計 360例。. The NE602 through the SA612 series are all virtually identical Gilbert cell-based integrated circuits. Receiver design for 20. Having developed an interest in WSPR last year, I purchased a very neat transmitter kit from QRP-LABS. The total sensitivity of the receiver is better than 0. Turn the receiver off, and then on at any time and temperature, the BFO frequency is exactly the same. org Ceramic resonator oscillators are as easy to construct as crystal oscillators, and nearly as stable and reliable. Download SMT MRX-40 Receiver book pdf free download link or read online here in PDF. Whats a Q Electronics Illustrated May 1964 4. A bit more tuning around during the CW Sweepstakes 2013 with the Homebrew Broadband SA612 receiver. 00 in US currency. Typically a first mixer translates the signal to an intermediate frequency (IF) first. At the receiver end, for a Signal-to-noise ratio of 3 dB, this may look like: A first glance will not reveal the original transmitted sequence. NE602 Balanced Amplifier and Oscillator. I bought a new CB radio and I just ordered a CB to 40 meter conversion kit. This simple speech processor is suited for all Atlas 210-215 types. I'm trying to design an analog portable single side band receiver (ham radio transceiver in future). Please use a IC base for all the ICS. Declarative templates with data-binding, MVC, dependency injection and great testability story all implemented with pure client-side JavaScript!. It can be used too as the 2nd mixer in a dual conversion receiver, and as a balanced modulator. No switch was provided for removing the preamp from the circuit as the RF gain works quite well to reduce receiver gain whenever appropriate. Best outgoing student 2014-15 Dr. Free Next Day Delivery. This circuit was used to stop all the BFO drift. Without an antenna, I can see the base and handset carriers of my cordless telephone at 31 and 40 MHz; and I can see my neighbour's wireless baby alarm at 49 MHz. At the IF a sharp band-pass filter (e. Основой этого трансивера послужила микросхема sa612. The oscillator pins should be no more than 200 mV. The relay K1 acts as the receive/transmit switch. Being a ham operator I'm always on the lookout for new radio related projects. FM Receiver TV Tuner 50MHz to 900MHz Kami menggunakan TA7358 (LA1185) di sirkuit ini , kita bisa menggunakan SA602 dan SA612 ( sebagai osilator konverter ) , atau. Each receiver is engineered for a very specific purpose and is designed from the ground up to perform one task as well as possible. 1 BNC PCB BNC Connector. It can be used too as the 2nd mixer in a dual conversion receiver, and as a balanced modulator. SA612 Datasheet : Double-balanced mixer and oscillator, SA612 PDF Download Philips Electronics, SA612 Datasheet PDF, Pinouts, Data Sheet, Equivalent, Schematic, Cross reference, Obsolete, Circuits Electronic component search and free download site. 2020 admin Комментарии 42 комментария Приемники прямого преобразования на микросхеме SA612 или ей подобных NE602(612), SA602 делали все, кому ни лень. 8MHz band pass filter with molded RF chokes leads to a SA612 mixer oscillator. les Typons et le schéma d’implantation des composants provient du Forum Polonais « Home Made …. Simple home made ADS-B receiver that takes IF from a modified receiver: RF: Oct 04, 2010: 1: Very Simple ADSB Receiver using a TV tunder to allow reception of aircraft transponders: RF: Oct 04, 2010: 0: 115200 RS232 QPSK RF modem project: RF: Oct 04, 2010: 0: Yaesu FT-736R doppler compensation: RF: Aug 14, 2002: 0: 30M PSK31 Transceiver circuit. SA612 and SA516-70 grade steel materials are used. Basic gain is set by the load resistor. The electrical circuit as it described below in the manual is intended for 14. ) A direct conversion receiver has a local oscillator and mixer like a superhet but the L. It helps for those of us that are struggling. HA16852MP : Optical Communication Receiver/amplifier. The mixer we used is a Philips SA612 Mixer chip, along with various other necessary external components (inductors, capictors, etc. 5 uV if you have good hearing. After some hamradio antenna updates I use now R-7000 GP for receiving DRM. This circuit was used to stop all the BFO drift. sa612 material SA-612high water pressure resistant. The BFO trimmer C24 was adjusted so that white noise was visible up to 3000Hz on the waterfall. Therefore, we don’t have to use transformer coupling. Another possibility, besides a dual conversion superhet, is an HF receiver with a 2-meter down converter bolted on the front end. After that I build super heterodyne receivers but when I built DC transceiver by W7EL at the beginning of 80’s ZL2BKW version I was surprised how good DC receiver can be. Sa612 Steel Plate Price xinhai. Zibo Tanglian lined storage vessel receiver with from tanglian factory TanglianTank&Vessel&Receiver. SA612 or SA612A should make a good, low-power SSB or CW detector. Please send me the new code for superhet receivers. Now, they’re widely available and ship from within the USA. Articles traitant de SA612 écrits par 3V8HB. Cheap Remote Controls, Buy Quality Consumer Electronics Directly from China Suppliers:Universal 2 channel Gate Garage Door remote control receiver 433MHZ fixed code and Rolling Code Receiver Remote control switch Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. 000MHz – 14. juwang best selling horizontal storage tank lng storage tank. The noise is not detected when the SA612 mixer frontend is connected to the Raspberry Pi, which is our suspected noise source. The IF frequency is chosen to be 8. 1 BNC PCB BNC Connector. The SA612 is a double-balanced mixer and oscillator (see data sheets). This page was also one of the very first circuit descriptions that I put on the internet quite some years agon. With addition of the TA7642, increased simplicity of the circuit, contributing with IF high gain, selectivity and demodulation for AM signals. Direct Conversion Receiver: making friends with the Signetics SA602 IC Introduction. The Belka-DSP radio receiver is designed to receive radio stations with amplitude, frequency and single-band modulation, as well as telegraph signals at short waves in the frequency range 3. Datasheet SA612 Double-balanced mixer and oscillator. sa612 receiver The later NE612 or SA612 is an improved pin for pin improved. sa612 material SA-612high water pressure resistant. It is cheap and easy to obtain. but i m not sure how can mix them using sa612. The transmitter section produces an output power of 1W. The NE602 through the SA612 series are all virtually identical Gilbert cell-based integrated circuits. 1, JANUARY 2009 129 Very-Low-Frequency Electromagnetic Field Detector With Data Acquisition. Основой этого трансивера послужила микросхема sa612. Declarative templates with data-binding, MVC, dependency injection and great testability story all implemented with pure client-side JavaScript!. 01 µF capacitor to ground filters out the high frequency component (the. Hans, No argument from me on any of your points, this is the reason why I intend to press the SA612 into transmitter/exciter service where it's limitations are not such an issue. NGL, LPG Plants & Terminals EPC; Vaporization/SNG systems; NGL, LPG/Propane Storage Tanks, ASME Vessel Fabrication for Chemical, Petrochem, Oil & Gas. The Belka-DSP radio receiver is designed to receive radio stations with amplitude, frequency and single-band modulation, as well as telegraph signals at short waves in the frequency range 3. Most parts for the receiver are readily available from sources like Mouser, Digi-Key, and Jameco. В каскадах УПЧ вместо пары 2SK241 можно применить один BF998. But even with an external antenna (12m wire) and a tuner in between the output volume is too low. Mixer ratings put the IP3 maximum at -15 dbm which comes out to about 40 mV p-p at the input. 0] for SC126. Derwyn Williams. is the local oscillator. Receiver: The receiver front end is entirely conventional. The RF signal coming from the RF filter is firstly transformed to 200 ohms. LED_DRIVER. HORRID SQUEAL SOLVED!. I didn't expect that!. SA612 Mixer The heart of the receiver is the SA612A is a low-power monolithic double-balanced mixer with on-board oscillator and voltage regulator. to be using a Philips SA602 mixer IC. 2uV with the LNA switched ON. ) A direct conversion receiver has a local oscillator and mixer like a superhet but the L. VFO signal is injected into pin 6 at about 300mV pk-pk. When it is a transister radio, large local frequency component (tuned freqency + IF) will pass through the mixer due to the mixer will be cheap emitter injection type. General description The SA602A is a low-power VHF monolithic double-balanced mixer with input amplifier, on-board oscillator, and voltage regulator. ) I think the radio is working very well on the LTspice iV(Liner Technology inc. A simple direct conversion receiver using a SA612 mixer would require a Local Oscillator at the received frequency. An AM super heterodyne radio receiver is used as a signal source. Yes, a square wave can be fine. Chapter 14 describes a vacuum tube regenerative receiver that was great fun to build and quite good for listening to foreign short wave broadcast stations. These instruction pages will guide you through all the steps to insure that you end up with an attractive and functional project. * Can of course be used by any receiver that has a 455kHz MF you can tap. The varicap diode-tuned LO covers about 50 kHz of the 75M band. Ordering information 4. We don’t think [VK4FFAB] did himself a favor by calling his seven-part LTSpice tutorial LTSpice for Radio Amateurs. The receiver uses the superheterodyne scheme of the receiver whit the IF frequency of 8. Sisu is a simple, compact, high-performance add-on receiver for use with VFO-controlled QRP transmitters. Public Projects:4 Libraries:7. The NE602 ( SA612 etc. The receiver is based on Realtek RTL2832U accessed using RTL-SDR library. The receiver uses SA612 mixers, so it won't be like a K3 or Orion etc. The IF filter is a 5-crystal ladder filter with 2. Follow @priyom_org Worldwide receiver map Wait-what is this? Priyom is an international organization intending to research and bring to light the mysterious reality of intelligence, military and diplomatic communication via shortwave radio: number stations. 7 Mhz Tuned Inductor 1. I had experience with the SA612 double-balanced mixer, but I did'nt want to make a converter. 350MHz upper single side band receiving of amateur radio transmissions. Active Probe: I use the counter like in conjunction with a simple, self-made active probe. Followings are simulation result of the 14MHz receiver which uses SA602/SA612 DBM mixer IC. 0] for SC126. The file "NE602 Rx. SA612 Mixer The heart of the receiver is the SA612A is a low-power monolithic double-balanced mixer with on-board oscillator and voltage regulator. 5,7,10,14,21,28MHz)で値段も数千円であり、. A series L-C T-R switch and bandpass transformer feed the SA612 first mixer. NGL, LPG Plants & Terminals EPC; Vaporization/SNG systems; NGL, LPG/Propane Storage Tanks, ASME Vessel Fabrication for Chemical, Petrochem, Oil & Gas. The mixer we used is a Philips SA612 Mixer chip, along with various other necessary external components (inductors, capictors, etc. The mixer circuit I decided to start with in my receiver is a simple direct conversion mixer based on the popular SA612. 5 MHz, IF Frequency 0 to 500 MHz, Conversion Loss 5 to 7. A 40 meter QRP-Transceiver - This was one of my very first transceiver developments. 50 MHz Receiver based on MC3372 circuit schematic schema wiring diagram diy project schaltbild shema; 50MHz Receiver for the IR Detector circuit schematic schema wiring diagram diy project schaltbild shema; 60-120MHz FM receiver with AFC circuit schematic schema wiring diagram diy project schaltbild shema. So I tried AD831 which had almost no gain while dissipating tonnes of heat. The circuit employs the 8 pin Signetics balanced mixer IC (NE602) which converts the incoming RF signal to the standard 455 Khz IF signal and provides about 13dB gain. The audio signal from the first stage microphone amplifier Q202 (PC-200) is coupled to integrated oscillator and mixer circuit NE612A (SA612), which converts it to a 6. The result is puny output power, in need of amplification and/or filtering. The SA602 is a rare and *very* hard to find IC and the price can be in the range of $4 to $6. Double-balanced mixer and oscillator, NE612 datasheet, NE612 circuit, NE612 data sheet : PHILIPS, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs. The OCR1A variable is one less than the actual divisor. And they are pretty cheep. Unfortunately, radio receivers covering this band are very rare. Worlds Smallest HF Receiver The version we posted about recently was his 'Production 3' version. This double-balanced mixer can be driven by a single-ended LO source and requires only –2dBm of LO power. The SA612 Mixer is powered at 6. Second, connect the 12 Volt power supply to the Radiono, but do not turn it on yet. The data sheet is a. The transmitter section produces an output power of 1W. Public Projects:4 Libraries:7. The toggle switch removes the inductor and lets the 7. As a result of high sensitivity of the Product Detector, the gain of the receiver from antenna connector to the detector input, is not necessary to be very high, improving in this way the overall receiver linearity and noise floor. 5 KOhms in parallel with about 2 pFd. The only thing missing is the LD1117 regulator so I am just powering it from an external regulated supply. 95 OP is OP. The IF filter is a 5-crystal ladder filter with 2. The output frequencies (10 to 10. Text Source for W1AW Web Code Practice Files for June 24 and 25, 2014: Text for the 5 to 15 WPM runs comes from November 2013 QST, page 85. 95 KB New Jerseys South Counties Emergency Radio Network. The mixer is a "Gilbert cell" multiplier. oh well gear comes and gear goes so mabe its time for me. The SA602A/SA612AN is a Gilbert cell, an oscillator/buffer, and a temperature compensated bias network as shown in the equivalent circuit. All seems to be working well, although only tested up to 50Mhz until I build the Si5351 module. This is a single chip superhet receiver with an intermediate frequency of zero Hertz. Mixer ratings put the IP3 maximum at -15 dbm which comes out to about 40 mV p-p at the input. Has anyone ever used one of these kits? I ordered mine from Cycle 24. The difference here is where the VFO is - in the superhet, it's the first LO, in the HF plus down converter, it's the second. The later NE612 or SA612 is an improved pin for pin improved equivalent so if you can't find a 602 then look for a 612. sa612 material SA-612high water pressure resistant. 192 MHz because there are many quartz crystal resonators on the market whit that frequency. The SA612 output frequency (f1-f2) is approximately 700 kHz (+/-). I was able to clean this noise up quite a bit by adding two additional clip-on ferrite rings to the output cable of the power brick. The thing hanging off the left side is an FTDI FT232R serial to USB module that I was using to program the microcontroller. ) data sheet shows the formulae for calculating the values. The Signetics SA602 IC is a double balanced mixer and tunable oscillator in one shot. The input is protected with a pair of back to back diodes and fed single ended into pin 1. When 4SQRP brought out a version of the David Cripe NM0S-designed Hi-Per-Mite Filter, I noticed that it could be configured to give up to 50dB of gain. Support Hours: Monday - Friday 7:30 AM to 4:00 PM Pacific Time. FM Receiver TV Tuner 50MHz to 900MHz Kami menggunakan TA7358 (LA1185) di sirkuit ini , kita bisa menggunakan SA602 dan SA612 ( sebagai osilator konverter ) , atau. Mixer conversion gain is somewhere in between 14 and 19 db. 136 kHz one knob QRSS receiver by IK2PII I don't like knobs, pushbuttons, blinking leds and so on whistles and bells on the receivers front panels. SA650H - Headset Mono 95 kHz SA652H Double Emitter Power Supply SA611 - Emitter, Small Area SA612 - Emitter, Standard Area SA613 - Emitter, Large Area. 110 nction r. The LT5560 is a low power, high performance broadband active mixer. The rig is a basic SA612-based design which can be found here:. Zener diode ZD3 provides a stabilized 6. Philips SemiconductorsProduct specificationSA612ADouble-balanced mixer and oscillator21997 Nov 07853-0391 18662DESCRIPTIONThe SA612A is a low-power VHF monolithic double-balanced mixerwith on-board oscillator and voltage regulator. This is a common problem with trying to use switching power supplies in the ham shack. The C101 capacitor is connected to ground just to filter away any spurious noise that is on the power lead going into the mixer. What we have so far is the audio stage centered around the LM386 amplifier chip, along with the low pass filter coupling the down-converted audio from the SA612 mixer chip. Best outgoing student, Department of. I'm trying to design an analog portable single side band receiver (ham radio transceiver in future). 4 MHz signal. Many kit receivers use ferrite toroids, but these require an external antenna. Receiver Design Fixed frequency (3. SA612/602 Mixer 1 U3 MCP601 DIP8 1 U4 LM386 Audio Amp DIP8 3 IC Sockets 3xDIP8 SA612, LM386, TL071 2 L1, 2 Neosid 1. The receiver has to be very, very small. The result is puny output power, in need of amplification and/or filtering. The SA602A/SA612AN is a Gilbert cell, an oscillator/buffer, and a temperature compensated bias network as shown in the equivalent circuit. The problem is in the simulation (I was so happy that I found a SA612 spice model) everything works fine, but in reality doesn't oscillate. Since LO is internally generated no need of external LO. The 10 turn potentiometer spans about 80kHz providing an easy tuning rate on what is a relatively narrow band. Mixer conversion gain is somewhere in between 14 and 19 db. What are the other demands? - range: 10m (30ft) - speed: 800bps (slow). I removed all components associated with the crystal circuit except for the capacitor across pins 6 and 7 of the SA612 mixer. ON1DHT's 50 MHz Converter Look under "Wireless" in his index on the left side of his home page. It can be used too as the 2nd mixer in a dual conversion receiver, and as a balanced modulator. How simple can it be? If you are a minimalist and like to mess with small electronics projects then you should meet the SA602 chip. It is intended for low cost, low-power communication. Bring back the Q-Multiplier 73 October 1969 Grenell 7. a quartz filter) simply selects only one of the two sidebands and suppresses the other one. 3) Rugby time code receiver. 2uV with the LNA switched ON. The mixer circuit I decided to start with in my receiver is a simple direct conversion mixer based on the popular SA612. Features of the 602 mixer. Both input and output impedances are 1. Ceramic Resonators for Cheap and Cheerful VFOs Jack Ponton, GM0RWU, [email protected] Please use a IC base for all the ICS. I used his MePads to mount the DIP sockets for the LM386 and SA612 chipssaved me several toasted chips, I'm sure. I ended up using SA612 mixers to combine paralleled 7. I made the PCB for an SA612 mixer module and assembled the first test build. The later NE612 or SA612 is an improved pin for pin improved equivalent so if you can't find a 602 then look for a 612. Build Your Own Antenna Analyser for under $50 Beric Dunn K6BEZ. 000 MHz 21t #26, FT37-61 Alt: 22 uH RF Choke 10 MHz T1 -- 5. Mixer ratings put the IP3 maximum at -15 dbm which comes out to about 40 mV p-p at the input. Best outgoing student 2014-15 Dr. Ke- member that the output of a mix- er is the sum and difference of Osc 500 mhz buy on Elcodis. Buy Hand Cleaner & Soap - Bottle, 3 L SA612. * The module will work as expected with a voltage of as low as 2V. On completion of your purchase a link to your download is instantly available in your account. Download a detailed datasheet for the MAS6180C receiver IC. Recommend Projects. * Can of course be used by any receiver that has a 455kHz MF you can tap. 8-15MHz; 15-24MHz; 24-39MHz. Another possibility, besides a dual conversion superhet, is an HF receiver with a 2-meter down converter bolted on the front end. The resistor R1, therefore, is the current limiting resistor to protect the Zener D3. This circuit is a switching type mixer with the 74HC4066 analog switch. SA602A NXP Data Sheet. 3 MHz (40 meters). but i m not sure how can mix them using sa612. Added better image of receiver. Receiver/Exceiter. The C101 capacitor is connected to ground just to filter away any spurious noise that is on the power lead going into the mixer. The resonator is a Murata CSB 455E. В каскадах УПЧ вместо пары 2SK241 можно применить один BF998. Posted: Nov Sun 15, 2015 8:13 pm. Joe Rocci, W3JDR, developed this one back in December. Excellent Receiver Sensitivity, Excellent Image and Spur Rejection 2. Philips SemiconductorsProduct specificationSA612ADouble-balanced mixer and oscillator21997 Nov 07853-0391 18662DESCRIPTIONThe SA612A is a low-power VHF monolithic double-balanced mixerwith on-board oscillator and voltage regulator. SA612 Mixer The heart of the receiver is the SA612A is a low-power monolithic double-balanced mixer with on-board oscillator and voltage regulator. Best outgoing student, Department of. Pictured above is a little AM superhetrodyne receiver that covers the broadcast band from 550 Khz to 1650 Khz. Both inputs are DC biased internally so. No switch was provided for removing the preamp from the circuit as the RF gain works quite well to reduce receiver gain whenever appropriate. Demonstrate the Variable IF and active audio filters & take a quick spin up to the 20 Meter SSB. Basic gain is set by the load resistor. Schematic is posted but there were some last minute changes for the Buildathon kits: a. SA612 µF 470 pF 82 pF 7042 kHz 10 k C2 C3 8-45pF U1 Antenna LL-4148 x 2 22uH 8-45pF C1 SMT MRX-40 Receiver v3 D5 LL-4148 C6 C16 C17. Ordering information Table 1. The balanced output. sa612 material SA-612high water pressure resistant. The SA612 is a good mixer, but has its limitations. Sure, the posts do focus on radio frequency analysis, but these days lots o…. So after completing the entire assembly and while testing the receiver the IC 74HC4053 can be removed from the base and jumpers can be used to the respective pins on the IC base like 4-3, 15-1 & 14-13. Derwyn Williams. Building and Operating: LF Converter An SA612 based LF up-converter from Jackson Harbor Press Introduction: The frequencies below the broadcast band are covered by few receivers on the market - those that do cover these frequencies are sometimes lacking in performance. Many designs using an SA612 as local oscillator / mixer and the ZN414 / TA7642 have been published on the Internet. SA612 220 pF 78L06 Out In Gnd 56 pF QRPme WWVR Receiver TP Gimmic By: Chuck, W5USJ, 20 Sep 2019 Frequency Counter 2 in length ribbon cable Strip opposite ends * QRPme Crystals C Inductors Capacitors Crystals 5 MHz T1 -- 11 H Cx A/R 15t #26, FT37-61 L1 -- 22 H 5. Le Taurus transceiver SSB est un QRP conçu par l’OM Polonais SP5ddJ. The mixer circuit I decided to start with in my receiver is a simple direct conversion mixer based on the popular SA612. Title: Circuits - Single-Chip Frequency Converter Author: Michael A. Der SA602 und seine pinkompatiblen Brüder SA602A, SA612, NE602, NE612 sind günstig und leicht zu beschaffen. I am particularly indebted to Philips Components and Semiconductors Australia for their most generous assistance in giving me access to material presented on this page. Direct Conversion Receiver • NE602/SA612 • 74HC4066 • 40673/Dual Gate MOSFET • TA7358 • Single Ended • Diode Ring Single Conversion with Crystal Ladder Filter • Exception: Check out Jim Kortge’s 2N2/40 which uses 2N2222 transistors with diode ring DBM’s. As a mixers I’m using the well known SA612. Initially I started with SA612 mixers but I was disappointed by their noise level. Little changed in the Signetics and Philips designs. The SA602 chip is a mixer with a built-in local oscillator. The circuit is based on two NE612 mixer IC’s and one audio amplifier LM386. Double superheterodyne receiver Double superheterodyne receiver. LO board provides all oscillator signals needed for signal conversion and mixing. The EMRFD design specifies the inductor as 20 turns of #26 wire on a T37-6 toroid. SA612 можно заменить на аналоги. Buy Hand Cleaner & Soap - Bottle, 3 L SA612. The design is based on the MRX40 Mini Receiver by K8IDN. I was wondering if a 191 would work in this simple application which uses a 1n5711, Amazing All-Band Receiver, the schematic is just a click down the page it is an all band receiver I would like to use for EMI testing. General description The SA602A is a low-power VHF monolithic double-balanced mixer with input amplifier, on-board oscillator, and voltage regulator. Classic 40 is a high-dynamic- range, high-fidelity direct-conversion receiver for the 40-meter band. 5 kHz of bandwidth. LED_DRIVER. The Easy Receiver kit from Qrpkits. It is intended for low cost, low power communication systems with signal frequencies to 500MHz and local oscillator frequencies as high as 200MHz. ) data sheet shows the formulae for calculating the values. The LT5560 is a low power, high performance broadband active mixer. The incoming 518kHz NAVTEX signal is is mixed with the local oscillator at 516. So after completing the entire assembly and while testing the receiver the IC 74HC4053 can be removed from the base and jumpers can be used to the respective pins on the IC base like 4-3, 15-1 & 14-13. 4 Page 4 of 5 12 dB Fixed Attenuator SMA Male To SMA Female Up To 6 GHz Rated To 2 Watts With Passivated Stainless Steel Body from. Le Taurus transceiver SSB est un QRP conçu par l’OM Polonais SP5ddJ. Copyright Semtech 2006 5 of 22 www. Support Hours: Monday - Friday 7:30 AM to 4:00 PM Pacific Time. Often the probe tip must be kept only in the vicinity of the oscillator in order to determine the frequency can. The LT5560 is a low power, high performance broadband active mixer. The problem is in the simulation (I was so happy that I found a SA612 spice model) everything works fine, but in reality doesn't oscillate. 5 MHz A3 Tuesday, December 13, 2016 1 1 Rig Expert Ukraine Ltd. And they are pretty cheep. This circuit has not been tested but a very similar circuit was successfully built for a recent A2 project. les Typons et le schéma d’implantation des composants provient du Forum Polonais « Home Made …. Many designs using an SA612 as local oscillator / mixer and the ZN414 / TA7642 have been published on the Internet. There are other holes on the board that connect to CR2 and CR7 on the side of the Caps not connected to Pin 6 on the devices. txt) or read online for free. Unless that is for a different receiver. Articles traitant de SA612 écrits par 3V8HB. 110 nction r. Sounds great on a receiver and changes frequency very nicely!. Double superheterodyne receiver Double superheterodyne receiver. Another possibility, besides a dual conversion superhet, is an HF receiver with a 2-meter down converter bolted on the front end. The C101 capacitor is connected to ground just to filter away any spurious noise that is on the power lead going into the mixer. The total sensitivity of the receiver is better than 0. He writes to tell us that along with his 'Production 3' release he created a 15mm x 15mm 'Small Form Factor' radio enclosed in one of the smaller RTL2832 tuner dongles, which is the 'Worlds Smallest HF Receiver'. NE602 Balanced Amplifier and Oscillator. The C101 capacitor is connected to ground just to filter away any spurious noise that is on the power lead going into the mixer. The design is based on the MRX40 Mini Receiver by K8IDN. Which is a little more than needed by the SA612, but it can be attenuated with simple resisters if needed. Of course when we can find a PCB designer for this project all sections of the receiver could be on the same PCB. The Mixer used in this receiver is Philips SA612. Now suppose the VXO will be tuned down a few kHz (to about 25 kHz max. 040- and a single 11. We don’t think [VK4FFAB] did himself a favor by calling his seven-part LTSpice tutorial LTSpice for Radio Amateurs. At the receiver end, for a Signal-to-noise ratio of 3 dB, this may look like: A first glance will not reveal the original transmitted sequence. Datadelen effektiviserar genom att skapa unika digitala lösningar där excelfiler och postit-lappar är ett minne blott. Read online SMT MRX-40 Receiver book pdf free download link book now. かなり以前から、ebayやaliに気になるキットが出ている。youtubeにも色々投稿されている。それは6BAND6. sa612 pdf Should download the 602 mixer data sheet - 109K which is in PDF format. I didn't expect that!. This is a common problem with trying to use switching power supplies in the ham shack. The total sensitivity of the receiver is better than 0. Several toroid cores are suitable, however I choose the T50-2 with primary 8 and secondary 16 windings. I like both circuits; the NE602/SA612 version for simplicity and the discreet for "scrounge-ability", HA! Novice builders: You can use the receiver as the basis for a general coverage test receiver! 73Steve Smith WB6TNL "Snort Rosin" Reply Delete. The receiver section is direct conversion using the popular NE612 (SA612/SA602/NE602) mixer and LM386 audio amplifier. I used the device’s internal oscillator as varactor tuned VFO.