So I came across a small treasure trove of WWII vintage channel marked radio crystals… Almost the full set for the BC-604 transceiver that covered 20-28 MHz which was at home in armored vehicles of the time….most of them in their original packaging. These are quartz crystals in the FT-241-A holders. These were made… Continue reading Random thoughts on something not random….the quartz crystal.
Category: Electronics
An inside look at a tube tester
This is just a very quick look inside a tube tester, a TV-7D/U to be more specific. I recently listed this one on eBay and naturally got some inquiries that resulted in my doing some further checks to verify its operation and answer the bidders questions. Most tube testers work in pretty much the same… Continue reading An inside look at a tube tester