Was struggling to understand what was overheating :)
SWR was increasing and power was lowering. Was trying to figure out whats wrong… Finally…
Метка: hf
Wolf 7″ amplifier in the thermal camera
No active cooling. Also there are no feedback circuits on both stages and untuned bias on the second.
Just photo of mrfx1k80h amp. parts
For qrz.com
Wolf7 first QSO
Plus couple photos.
Wolf 7″ first HF transmission
Video in russian language
Back 2 da roots
Simplest SDR receiver with network connection.
Just two pictures
Noise floor without electricity
Amplifiers hottest parts measurements
Checking with the thermal camera
Unknown wideband amp. from Aliexpress
https://aliexpress.ru/item/1005006114325611.html Maximum output with 30v input voltage on HF band — 1.369 watts: More input power — failed output: It hasn’t any
Just finished reserve rd100hhf1 amp
80-40-20m measurement