QRP
I've got another grab-bag of miscellaneous news for this post, but I'm going to lead off with the big one: I'm going to be a presenter at the world's preeminent QRP convention: Four Days In May 2012. The tentative topic for my presentation will be about the free and open source tools that I use [...]
Progress on CC-Series development proceeds at a reasonably-good clip right now. One of my last big hardware bugs to stamp out is some nasty microphonics that seem to be generated by the combination product detector/BFO. Today, I believe that I made some significant progress towards solving it and wanted to share what I learned. I've done a [...]
Continue reading about Single-Ended Mixers and Reverse Isolation
I'm happy to report that the second of four CC-20 beta kits is completed and working! Mikey, WB8ICN got his all finished up with no major problems and made a first QSO with N1WPU. It looks like he made a nice custom enclosure out of some very sturdy copper clad. Very, very nice! Please click [...]
Here it is, the first CC-Series beta unit completed by someone other than me! As is obvious by glancing at the photos, Dave AA7EE has done a magnificent job of assembling the CC-20, as well as creating a custom enclosure for the radio out of red copper clad using the WA4MNT technique. There's really not [...]
No earth-shattering news to report on the blog, but a few little things to mention (hence the "junkbox" title). The CC-20 Beta 1 test is proceeding pretty much as planned. As of tonight, AA7EE has his receiver up and running now and a couple of the others are close behind. I'm eagerly awaiting the results [...]
I'll admit there were times when I thought I might never get this thing working, but dogged persistence in the face of frustration will sometimes get the job done. Failure to accept the mushy and hum-ridden audio finally led me to crack the tough nut. Today, I finally slew the new CC-20 beta dragon. Without getting into [...]
As I've previously noted, the VRX-1 is a nifty little basic direct conversion receiver, but it has some shortcomings that could be problematic under certain circumstances. Here's a story of one of those issues and the cure that was found. Dave AA7EE purchased and built a VRX-1 kit a while ago but was never fully [...]
