Jim,

Sorry about my phrasing, I did not mean to imply that it was strange 
that the varying V- current would cause modulation, it can and it will.

What I intended to say was that the modulation itself might appear 
"strange", and may not be recognized as mmodulation at all.

73,
Don W3FPR

On 9/12/2010 12:34 PM, Jim Brown wrote:
>
> Don said:
>
>> Strange modulation of the V- line to the accessory can result,
>> especially with SSB transmission,
> Nothing strange about it, it's simple Ohm's Law. :)  You have DC
> current on the V- lead that reaches a peak value of at least 20A, so
> there is voltage drop on that lead as predicted by Ohm's Law.
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