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Monday, August 11, 2025

AWA 6AQ5 Transmitter

I've gotten the RF portion of my AWA 6AQ5 transmitter ( https://www.antiquewireless.org/homepage/pcb-item-12 ) done and tested on 80, 40 and 30 mtrs. This transmitter sounds nice on 80 and 40 running 8-10 watts out with a single 6AQ5. It doesn't sound quite as good with HC49S crystals on 30 but it is still acceptable. 

The plate tuning and load variable caps are under the chassis. Temporarily I'm running with an external 300 VDC power supply. Eventually I'll add a power supply in the spare space at the rear of the chassis. The PS transformer and rectifier will go on top with the fuse, filter caps and filter choke underneath.
 
The PC Board and parts list from AWA allows for a straightforward semi-kit or homebrew project. My thanks to the AWA for making them available.
 
KC7WXD built one also. See https://www.youtube.com/@kc7wxd
 
Does anyone know when PC Boards started showing up in tube rigs? Were there any before the Knightkit R-100? It used a PCB for most of the components. See its review in the Nov 1958 issue of QST.
 
 



 

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