[Amps] Which LDG Autotuner for Amp Input?

[jeff millar]

On 10/10/2010 12:42 PM, Gary Schafer wrote:
> Look at the WD7S tuned input board.
> http://home.earthlink.net/~wd7s/TU-6B.htm
>
> An external tuner is not the best way to go as the output capacitor of the
> pi net needs to be very close to the cathode of the tube.
>    
That's probably true in the sense that the the line from cathode to 
tuner should be much shorter than a wavelength at the operating 
frequency...or else the capacitor starts to look like an inductor.  So 
how about putting enough capacitance close to the tube cathode to cover 
say 10 through 20 meters and then use a relatively short line to connect 
to the tuner?

jeff, wa1hco

> The WD7S board solves all problems.
>
> 73
> Gary  K4FM