Here was the situation: having been a technician for over thirty years, I had decided to get a degree so I would have Engineer credentials. I didn’t mean to make fun of people whose first language isn’t English. I look forward to Hackaday carrying project from you that demonstrates the use of “cool technology” and that is more accessible. Getting on for 100 people have picked up his design for a Direct Conversion receiver from last year, some of them engaging in amateur radio for the first time. You could actually reproduce it by driving tacks into a breadboard – oh wait, that old technology …įar from being “superficial” Pete has been a very prolific designer and has made his work open and available for anyone to pick up and build themselves. The same circuits can very easily be adapted to being reproduced on perfboard, or simply by drilling plain pcb. The construction style is easily reproducible using MeSquares, a scriber, a Dremel, a CNC, or just by cutting up off -cuts into pads, so it’s cheap, flexible and accessible to many.
The joy of Pete’s designs is that a) he’s spent a lot of time making sure that it does work, b) designs in simple easily understood, built, and tested modules, c) his designs make it easy to use them as a platform to experiment, and d) he is usually accessible to help people who build it and find that they don’t understand something. Because Pete has taken the time to engineer it, its simplicity belies it being really quite sophisticated in terms of only using what is necessary, and no more, the mark of a good competent engineer.
Its a good sound basic design built in a way that’s very easy to reproduce, fault on and modify using easily obtained components. Posted in Radio Hacks Tagged 2n2219a, 2n2222a, amateur radio, ham radio, IRF510, QRP, QRP operation Post navigationīerb, I’d be intrigued to know how you think it isn’t accessible. We appreciate this contribution to the homebrew ham radio community, and we’re sure this will provide many nights of solder smoking enjoyment for radio amateurs around the world.
#Old transistor radio circuits code#
has painstakingly documented the entire project on his website, and the code for the VFO is available by request via email. Be sure to check out the demonstration below the break! On the other hand, the PSSST was modeled stage-by-stage in LTSpice, ensuring great transmit audio and nice receiver performance. Many simple transceivers are designed to demonstrate a minimum viable radio, with performance not really a goal. The VFO and IF frequencies are both provided by the venerable si5351a with an Arduino at the helm. The best part is that all of the transistors can be had for under $10 USD! shows where radio components such as the RF mixers and the crystal filter can be purchased, saving a new constructor a lot of headaches. On transmit, an extra three components step in to amplify the microphone input and build output power, which is 2.5-4 Watts, depending on the final output transistor used. The same circuit using four 2N2222A’s is used on both transmit and receive. What makes the PSSST so simple is not only its construction, but the low component count. He forged ahead, building a novel design that he calls Pete’s Simple Seven SSB Transceiver, or PSSST for short. When sat down to design a sideband transceiver for the 20 Meter (14 MHz) ham radio band, he eschewed the popular circuits that make up so many designs.
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