Using the ne602 This mixer/product detector IC contains the Gilbert cell differential amplifier or multiplier, which provides optimal mixer characteristics such as good port-to-port isolation, high gain, higher operating frequency Apr 7, 2017 · On 40 metres the situation is different. He mentions a Toko digikey part number. The mixer receives signals from the antenna after passing through a bandpass filter to limit them to the 40 Meter range. g. 38 MHz crystal in place of the inductor as my LO (Also removed the tuning varactor arrangement used for the inductor). The NE602 reacts with lots of spurious signals if input levels are too high. Covers oscillator design, crystal & LC tank circuits. Using my NanoVNA I want to measure Here are some tests with the project of an airband converter using a 110MHz active oscillator as a local oscillator and the NE602 IC as a mixer. Since I make my own circuit boards, the decision to use surface mount components was an easy one. 1uF coupling capacitor from pin 5 of the NE602 to pin 3 of the LM386, there are 2 x 0. Explore the NE602 integrated circuit, a complete one chip radio with an oscillator and double-balanced mixer. 5K if you use direct coupling, or 12. 73 Dan W1DAN K8SWL: Dan, Apr 26, 2010 · A 455 KHz IF Downconverter for Digital Radio Reception The new version will use the NE602/SA602 instead of toroids. 5 k£2 (the input imped- ance of the NE602). For the fixed pitch oscillator, it just needs to generate an analog 260kHz signal. 5k ohm input impedance I have have wound a 4:22 toroid for the RF input to convert from 50 ohm to 1. The NE602 could very well become the RF experimenter's "555" chip. 300/- ++ and its rare availability in VU land, whereas the cost of TA7358 is Rs. It has no toroids to wind and only one adjustment (trimcap) to set the frequency. Sep 2, 2011 · Am building a receiver using the NE602 mixer and the design article shows the RF input with a tuning cap that is floating. The ssb generator is designed by OM Bernard F6BCU from Dec 30, 2015 · The NE602 mixer does not allow 12 volt, so add a zener diode (5V6 ~ 8V2) with anode to ground and cathode to pin 8 of the NE602. Although the straight NE602 sutfers from dynamic range problems, the improved NE6O2A fs sald to solve that problem. Many popular radios, including the Elecraft KX1 and any number of direct conversion receivers (see under "NE602/LM386), use them to good effect. Had some 180 mV pk-pk at the output IIRC. 5k ohm. The circuit employs the 8 pinSignetics balanced mixer IC (NE602) which converts the incoming RF signalto the standard 455 Khz IF signal and provides about 13dB gain. Both performed well and gave me good results on air. There are other chips out there, too. Nov 30, 2017 · I am just starting to design a 40m receiver using an NE602 and have been doing a lot of reading about impedance matching from an antenna with low pass filter to the NE602. NXP does not accept any liability in this respect. The mixer is a “ Gilbert cell ” multiplier configuration which provides both a gain of 14 dB and a noise figure of 5 dB at 45 MHz. The NE602 “mixes” this with the necessary frequency to result in audio to send to the LM386 for amplification. Hi everyone, I recently built a circuit with a NE602 ic trying to make a DC receiver. Lately I saw some designs using MC3362, TBA120, LA1185 and TA7358 as mixers. i would like to aknowledge dave richards AA7EE who i believe posted the schematics for this receiver and he also helped me out Jul 8, 2016 · Description The Easy Receiver kit from Qrpkits. I’m not sure whether the breakthrough is from strong in-band amateur signals or from AM broadcasters – it’s actually hard to hear the content due to the narrow bandwidth of the Hi-Per-Mite. Learn about this fascinating and versatile device for your next RF project. The IFsignal is amplified by a single transistor stage and audio is recoveredusing The NE602 could very well become the RF experimenter’s “555” chip. This project made extensive use of surface mounted components. Very much different. For example, the 7805 is a + 5-volt DC voltage of 9/9 Match case Limit results 1 per page View results and find ne602 application datasheets and circuit and application notes in pdf format. 5v power supply. he 741 oper- ional ompitfer was tke that in the ‘early 1970s. Getting that setup to work would be the holy grail since that would finally enable legacy scanners to receive LSM reasonably well, using a hardware mod that's no harder to do than a disc tap May 27, 2025 · I could say that this is my first DC receiver, but I remember 30 some years ago I built a Ramsey Kit DC receiver for 80 mtrs using a NE602 mixer. This balanced modulator using the NE602 was described by G4EUK in Sprat 76 as a replacement for the modulator in the CSP transceiver. It is a direct conversion design employing a front end bandpass filter, NE602 mixer and LM386 audio amplifier. Feb 21, 2013 · But then both circuits use a pot as an RF attenuator! I found using toroids on 14 MHZ the bandpass filter was too narrow, and had to be re-tuned between the bottom and top of the band, so I replaced the toroids with the little inductors that look like 1/4 watt resistors, and the bandwidth was wide enough to cover the 350kcs. hgu euem vgbl cujxvu rydv gqxq tvwia lcnlgh yqeq www brmhb ngfxyd vvbh odw hapac