Homebrew: N1TEV Kitchin Regenerative Reciever
After speaking with my good friend Jeff (N9IZ), he got me interested in building a regenerative receiver. Jeff shared with me several YouTube links that have receivers like this that many hams and experimenters have built.
This particular receiver design comes from Charles Kitchin N1TEV. His design is a modification of a classic design that dates back to the 1920’s. The main modification is the use of the LM386 audio amplifier IC to give it a little better volume control, the use of 2N2222A transistors (instead of tubes), and the diodes that go to ground to improve regeneration.
When I decided that I would like to build a regenerative receiver and researched different designs, I settled on this one because I have heard that it is the most successful of the designs.
Originally detailed in the September, 2000 issue of QST magazine, the article that describes the design and details the circuit is available online here. There is a comprehensive parts listing complete with RadioShack part numbers for almost all components with the exception of the variable capacitor that is used for tuning (air-dielectric variable 150-350 pF). However those variable caps should be fairly easy to find, and most hams may even have one lying about or in something that could be scavenaged (like another old radio 😉 ).
This will be a multi-part build so, once I get the parts in I will document and maybe even make a video of the build. I think Jeff is going to build one with me, so that should be a lot of fun as we curse our way through the problems of the build and getting the thing to work correctly. I plan on making mine work on the 40m band. I thought that would definitely be more useful than another AM broadcast band radio, and then who knows, maybe Ill make a 40m transmitter as well. The regenerative receivers are pretty cool since they do not need a BFO or other circuitry to tune in AM, SSB or CW signals well. Just a touch of the regeneration control will help tune all signals in loud and clear. Well, im off to order the parts to put this together, so see you soon!
73! de Nick N9SJA