![]() ![]() Q1 y Q2 are a cascade darlington transistor array for amplify the current. The ferrite coil from am radio and a variable tunning capacitor sintonize the frecuency and the other circuits is amplification and selectivity. ![]() Luke Sontrop liked PullStruder: from plastic bottle to PET filament.We'll need some electronic components and any other thinks that you like to add for modify the radioģ- NPN TRANSISTORS (I RECOMMEND YOU TO USE GERMANIUM TRANSISTORS AC187) OR 2N2222 ANY GENERAL PURPOSE TRANSISTOR.ġ- VARIABLE CAPACITOR FROM AN OLD RADIO O FROM RADIOSHACK STOREġ- FERRITE COIL (ANTENNA AM RADIO) FROM AN OLD RADIO TOO.ġ- 3k3 Resistor (if whistles appears in the output cound you can to change the value between 2K7 TO 3K3 ohms).ġ- Little Speaker (you can to choose add plug for earphones).ġ- 1.5 V Battery (AA/AAA/C/D) anyone you have.ġ- Wood enclosure or anyone you have it's for to protect the proyect and have better look.ġ- dill or anything to make the holes in the enclosure.ġ- PCB board of cooper for to make the circuit.Luke Sontrop liked The Recreator 3D - Make Recycled PET#1 3D Filament.alain.haerri wrote a comment on A Million Times 288 clone.Mirko has added a new log for Trick Tracker.Han liked The Trash Printer - Version 3.davedarko wrote a comment on Time Machine Mk.kelvinA has added a new log for Coaxial Hotend.Tom on Royal Navy Tests Quantum Navigation.Observer on Royal Navy Tests Quantum Navigation.Observer on Billion Year Clock Is LEGO Genius Or Madness.thom on Royal Navy Tests Quantum Navigation.Gérald on The Integral Molten Salt Reactor And The Benefits Of Having A Liquid Fission Reactor.Johannes Burgel on Royal Navy Tests Quantum Navigation.burrito on The Integral Molten Salt Reactor And The Benefits Of Having A Liquid Fission Reactor.Peter Vogel Fan on Op Amp Contest: This Lighthouse Sculpture Flickers In The Rhythm Of Chaos.m1ke on Royal Navy Tests Quantum Navigation.Can’t tell with this one, I won’t watch videos to see a schematic. I’d point to his work before some random project on the web, especially when many such circuits these days derive from his work. (He did the same, to a lesser extent, for superregenerative receivers, which are just an extension of the regen.). Over twenty years ago, Charles Kitchin went back and reviewed early literature on the regen, and then moved forward with various regen projects. ![]() Add some voltage regulation, you would if it’s an oscillator. Helps keep the regen from becoming unstable as the antenna waves in tye wind. So you can do things like add a stage between the antenna and set ctor, for isolation. But solid state made things small, and cheap. In the 1920s, parts were big, and expensive, hence simplicity reigned. When oscillating, it’s really the same concept as a direct conversion receiver. You needed that if receiving morse code, the oscillation beating the incoming signal down to audio. Posted in Radio Hacks Tagged radio, regenerative radio Post navigationĪctually, when regens were king, kicking them into oscillation was often important. The inventor, Edwin Armstrong, developed quite a bit of radio tech that we still use today. While regenerative receivers aren’t the most common architecture today, they still have their place. But, then again, we have a lot of partial projects like that gathering dust on the shelf, so maybe that’s not such a great idea. We’d be tempted to make a module out of the audio amplifier and then keep the RF section intact. We were a little sad to find out there was a plan to tear the radio down to build something else. This provides extremely high gain at a particular frequency which allows just a single stage to really pull in signals. Regenerative receivers work by holding an amplifier just shy of oscillating at a certain frequency. The layout would work with a single-sided PCB and would be a great board to produce by hand if you were inclined to develop that skill. The coil of #22 wire dominates the visual layout, and we imagine winding it might have been the most time-consuming part of the project. You can watch a video about the simple receiver - which looks good on a neatly done universal board - below. Well, one transistor if you don’t count the dozens that are probably on the audio amplifier IC, but we won’t quibble. Example? modified a few existing designs and built a one-transistor receiver. They perform well and they are dead simple to create. ![]()
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