Was struggling to understand what was overheating :)
SWR was increasing and power was lowering. Was trying to figure out whats wrong… Finally…
SWR was increasing and power was lowering. Was trying to figure out whats wrong… Finally…
I’m using not best quality 0805 inductors (it’s just too hard to buy good here in Batumi) from aliexpress so BPF loss
Tang nanos and Portapack
No active cooling. Also there are no feedback circuits on both stages and untuned bias on the second.
For qrz.com
Plus couple photos.
Photos of nanovna filters measurement.
Video in russian language
Photos + short video
Gra & Afch kit