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 varactor for even greater mechanical simplicity. However, when [ ]
Note A number of folk have mentioned experiencing difficulty leaving comments underneath posts on this blog. Unfortunately, I don t how to remedy that, or even whether I could. It s a free blog, and I assume that much of the functionality is out of my control. I do enjoy reading the comments and getting feedback [ ]
With many of the projects described in this blog, the idea to build them had been in my head for a while (often years) before it was finally acted on. This one was a little different. I had been aware of the NorCal 40A for a long time but, other than knowing it was a [ ]
NOTE: In the following post, I ll be referencing component designators according to the original schematic, which is in the SST manual, available here, on Ken WA4MNT and Karen KF4EEL s QRPBuilder website (check out their kits). I will also be making reference to the SST QRP-L archive, which is available here. (All links open in a [ ]
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 [ ]
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 developed a thing [ ]
I m not a collector of vintage headsets. 2 years ago, I purchased a high impedance Western Electric headset for listening to crystal sets. I also bought a set of Baldies . Both of these were in good, though not pristine condition, so I felt OK with using them for everyday listening. Although I used the Western [ ]
Back in 2010, I became interested in legal micropower broadcasting under the FCC Part 15 regulations, and assembled an SSTRAN AMT3000 kit transmitter for the AM broadcast band. I had limited success with an outdoor installation, but it worked well for broadcasting around the house. I later graduated to an outdoor installation with a Hamilton [ ]
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 built with [ ]
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 famed Baldies ) and [ ]