[ARC5] Added 6F6 audio stage.

[Kenneth G. Gordon]

On 20 Oct 2012 at 10:35, WA5CAB at cs.com wrote:

> 
> The early receivers (RAT/RAT-1, RAV and ARA) , plus the AN/ARC-5, all have 
> 500 ohm output.  The early SCR-274-N had 4000 ohm output.  In the B models, 
> the transformer has an added 250 ohm tap.

Thanks for the clarification, Robert. I was just guessing from my poor memory, but the idea is 
the same.

Match the damned impedances and leave the radio alone.

Ken W7EKB