LCR meters are a very useful tool for radio enthusiasts. I recall that handheld units started to appear on the market in the late 1990s and models such as the AVO/Megger BM183. Prior to this LCR instruments were cumbersome bench only instruments based on bridge designs and they were very expensive even if…
Airspy R2 Repair
This Airspy R2 belongs to a fellow scanning enthusiast. I have replaced the USB socket twice on this unit already. I stated to the owner, use extreme caution when plugging or unplugging from micro USB. It is so important not to be heavy handed when plugging or unplugging the unit. Micro USB sockets are very…
SDRPlay RSP1B SDR Receiver
SDRPlay and a bit of history. SDRPlay are a British Company who manufacture SDR products. The origins of the comapny can be traced back to their first product to be released to the world market way back in August 2014 with the original RSP1 radio receiver which had a 2 tone grey and blue…
AT-100M and AT-100M Pro Automatic Antenna Tuners by BI3QWQ.
The AT-100M is a further incarnation of the popular N7DCC type tuners which are widely available. The AT-100M standard version on the right and the new AT-100M Pro on the left. One thing which set this tuner apart was the quality of internal parts and the assembly which is more than acceptable…
HF Propagation Conditions