[Lowfer] Grabbers

[jrusgrove at comcast.net]

> Probably get more bang for the buck if a guy ran WSPR on 1750m. Use a HF
> rig with a transverter and a linear final amp out at the antenna.


No need to run a linear final if it's constant amplitude FSK.

I've been running MFSK, Amtor, Jason, Domino EX, Olivia, RTTY, Thor etc for the past couple weeks 
through the kilowatt Class D amplifier. Setup is linear exciter > frequency doubler > Class D final. 
The input stage to the Class D is a flip flop to develop both phases...thus the need for 2X 
frequency.

Circuit below was thrown together with workbench 'pre-used' parts. It could probably be simplified / 
improved but worked so well I've been using it as is. Only downside is the Class D is 95% efficient 
compared to the big Hafler at < 50% so the shack isn't as warm ;~)

Jay W1VD  WD2XNS  WE2XGR/2 
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