[600MRG] WD2XSH/6 testing amp

[pehamel]

After five years ( about10,000 operating hours) with the same tubes and 
after many modifications to the 811 amp, I am now running double the erp 
that I was putting out with the exciter running full bore this last few 
months.
One of the tubes developed an open filament on one side, so I tried to match 
the other three with my spares and tube checker. The spares were all better 
than the amp tubes, so now I need to reawaken the thoriated tungsten on the 
filaments of the three tubes.
I have a way to go to get near the 20 watt ERP limit, but copy should be 
better.
Anyway, WD2XSH/6 is QRSS10 on 475.322KC tonight until 05:00GMT.
Your report is awated with anticipation.
73,
Pat Hamel W5THT & WD2XSH/6
W5THT at arrl.net
Unhappy Tubes Blush, unhappy power FETs scatter plastic loudly.