[ARC5] T-17 mike with a SW-217 PTT repair

[Jim Haynes]

In case it will help, attached is the schematic of an electret replacement
for a carbon T-1 element.  I guess in a T-17 replacement you could leave
out the diodes since the polarity of DC is always (?) the same.

This schematic came from disassembling a T-1 replacement obtained from
a telephone supplier, sandman.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Electret_T1.jpg
Type: image/jpeg
Size: 25528 bytes
Desc: 
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20170331/4d006c0d/attachment-0001.jpg>