[Milsurplus] TCS: T-17 and RS-38 Microphone Mystery

[Hubert Miller]

I would take a guess and say it has more to do with the mic transformer 
ratio than mic current.
There is only so much current you can put thru a carbon mic before it 
starts to sizzle and pack
solid.
I have been surprised in the past to see how minimal a carbon mic 
modulation scheme can be.
I think the German field radio transmitter 5WS uses only two tubes, osc 
and PA, with the PA
modulated directly by mic and transformer. I think the Japanese navy 
aircraft radio 96-2 has
the same thing. Maybe those were designed primarily for telegraphy, with 
voice as secondary,
and lower modulation percentage acceptable.
-Hue
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