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
Few measurements
Old tube amps
Here I want to preserve some memories of tube amplifiers that I had in the past. Some time has passed—around 7 years—since I last powered up the last of these amps. This post will be long, but I don’t want to split it.