[Elecraft] KPA500 & Drake TR7

[Don Wilhelm]

Marcel,

About the maximum voltage, that might be in the TR7 specifications. 
OTOH, start with the pot at a low voltage and increase it until you 
achieve the results that you want.

The K3 EXT ALC default threshold is -4.0 volts, so that may be a good 
starting point for your experiments.

73,
Don W3FPR

On 1/13/2019 5:19 PM, Marcel Jorba via Elecraft wrote:
>   Thanks to all of for your prompt answers
> On CW it works great thanks to the carrier adjustment control
> 
> On SSB: it goes to 150W out very easy
> Yes it is just for fun.
> The K3 is great but the TR7 is funny and special.
> 
> 
> One last question: Someone suggested to use a 9V battery  with a pot to inject a constant negative voltage in to the TR7. But any idea about the maximum voltage?