[Amps] Drake L4B and L7 QSK Board

[Jim W7RY]

##(VE7RF)  But if you only have one amp, and no requirement to calibrate the 
internal wattmeter, but want QSK, the new board
is the ideal  ticket.   It’s a well designed board, I like it.... and it 
eliminates the mech clunker.

Thanks!

##(VE7RF)  for qsk use, or just fast, quiet vox,  I used TWO vac relays, one 
for the input, and another one for the output.
The reed relay is simply replaced with another vac relay.

True... But, you save $$ and keep the amplifier that much quieter by using a 
reed relay. Easy enough to drill a hole (or 3 of them) in the bottom of the 
L4 chassis for wattmeter cal.

You don’t need to run 1500 watts through the relay just to calibrate the 
wattmeter. There are many other ways.

73
Jim W7RY