[ARC5] T-17 Microphone

[D. Platt]

Well, your T-17 mystery is sol-vid, as /Inspector Clouseau/ would say.  
The thing is, there are T-17's.. and then there are T-17's.  I have no 
less than 10-15 T-17 mics in various states of usefulness.  I have one, 
early straight T-17 that has amazing output, to this day.  Others vary 
from so-so, to genuinely usable, to all-but-dead.  The ones that 
surprise me are the later M-15/UR mics, some from the 60's and 70's that 
replaced the T-17's.  RS-38-type carbon mics have also been a general 
disappointment.  Again, a few are OK and a few are not.  That one T-17 I 
have beats all odds.  That said, I do have a query for the interested 
group. Why is it that some MIL radios that utilize single-button carbon 
mics won't accept carbon-compatible mics, such as the Electro-Voice 
FAA-approved mics.  The GRC-9 is the one I have the most issues with.  
Bias polarity, etc. is not an issue.  Is is RF feedback?

Jeep - K3HVG