AA7EE
The Soldersmoke Direct Conversion Receiver was the first time I had ever built anything with a permeability tuned oscillator (PTO for short). I had never previously been that interested in them, due to the extra mechanical complexity over a standard LC circuit with a variable capacitor, or...
AA7EE
Well gosh. About a month ago, it was feeling as if every builder in the homebrew community had built the SolderSmoke Direct Conversion Receiver, apart from me. That’s a slight exaggeration, but I’d had a nagging feeling in the back of my head for quite a long time that I really ought to build it...
AA7EE
After finishing the two-transistor “Jingy 40” regen, I was looking for a little transmitter to use with it. I cycled through a few different designs, before deciding to “play it safe” and build another GM3OXX OXO transmitter. Why not just use the one I already had? Well, in the meantime, I had...
AA7EE
Or “The One-Transistor Regen That Turned Into A Two-Transistor Regen” with thanks to G3XBM and N0WVA. (Note – if reading this post on a computer, you can click on any of the images for a slightly larger version.) About 10 years ago, Doug N0WVA told me about an impressive little regen he had...
AA7EE
No new construction projects here, I’m afraid, and none planned for the foreseeable future, though I have made some exciting and worthy acquisitions. A couple of years ago, I was looking for a vintage high impedance headset to use with crystal sets. For regular use, I found a set of Baldwins (the...