Amateur Radio Island - Our "antique" R-140 amplifier with GU43B tube, which had been working for many years, suddenly died. It will take a long time to get it repaired back to
gu-43b
FRI-1500 HF amplifier with GU-43B
GU-43B tube power amplifier - Ham-amplifiers
FRI-1500 HF amplifier with GU-43B
GU-43B-1 (original box) | Soviet-Tubes
DC9DZ: Projekt Katana 3K – Power Amplifier (PA) mit GU43b