[Milsurplus] T-17 and RS-38 Microphones

[W2HX]

I have only a modest collection of WW2 transmitters (ARC-2, BC-375, ATD) . But I do, of course, have T-17s and RS-38 mics.  One thing that always bothered me about the RS-38 was the lack of a loop to hang it onto something. It seemed like a bad design. A search on Google brings up aafradio site and explains that there was a special clip to hold the RS-38 (and a special hanger for the T-17).  According to aafradio the T-17 hanger is pretty uncommon. How about the clip for the RS-38? Anyone have one? I hate the mic just dangling around!

 
73 Eugene W2HX
 

-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of David Stinson
Sent: Monday, December 21, 2015 11:21 AM
To: mrca at mailman.qth.net; milsurplus at mailman.qth.net
Subject: [Milsurplus] TCS: T-17 and RS-38 Microphone Mystery

Been refurbishing at TCS-13 (photo on my QRZ.com page).
I dug-out all my T-17s and RS-38s, looking to "seperate the sheep from the goats."  Most of these don't work with either SCR-274N or SCR-287.

To my great surprise, ALL of them work on the TCS transmitter, the worst of the lot still doing at least 70%
modulation.   The 274N and 287 use current-limited 
filament voltage to power the carbon mike.
The TCS uses the cathode bias of the modulators.
Diagram attached.
So- why do they work with the TCS, but not with other rigs?

73 DE Dave AB5S