[TenTec] Mic Extension Cable Doesn't Work

[John Huffman]

I have a new Ten Tec 706 microphone that I'm using with my Pegasus.  It works 
fine, no problems.

The cord is too short, so I bought an extension cable with a 4 pin female 
connector on one end.  I wired a 4 pin male to the other end.  I connected the 
extension cable to the Pegasus and the mike to the other end of the cable.

Audio works fine, but the PPT button and the VOX button on the microphone won't 
go off.  You have to unplug the mike from the cable to get them to go off.  I 
start with the buttons off, all is well. I push either button and it locks in 
the on position.

I've checked the cable a dozen times.  Pin 1 goes to pin 1 and nowhere else. 
Same for pins 2, 3, and 4.  None of the pins are connected to the shield of the 
cable or the shells of the connectors.  None of the pins are shorting against 
each other.

This even happens when I have the "Xmit Disable" button pushed on the N4PY 
program, so no RF is causing the problem.

I'm guessing it may be a ground problem with the PTT circuit in the base of the 
mike.  I've tried jumpering the shells at each end of the extension cable with 
no luck.

I am at a loss to understand how extending 4 wires would cause the PTT to lock 
on.

Any suggestions will be greatly appreciated.

73 de NA8M
John