Thanks George, I was looking for that schematic but probably didn't look
hard enough:-)
72/73,
Peter - PA0PJE
GDanner schreef:
Peter,
Bias is "added" to the tip via menu.
The voltage you read on the 1st ring is the pull-up for the PTT & UP/Down
buttons.
See the schematic for the MH3 microphone (
http://www.elecraft.com/manual/MH3%20Rev%20A.pdf ).
It does show the connections to the mic plug.
I can not find the Mic jack on the KX3 schematics.
I used the MH3 schematic to make an adapter to interface my K3 microphones
in case I need my KX3 to back-up my K3 & KPA500.
73
George
AI4VZ
-----Original Message-----
From: Peter Eijlander (PA0PJE)
Hi Dom,
When I measure the mic connection with a standard 3.5 mm. stereo cable
with two RCA plugs at the other end, I end up having no voltage on the
tip of the 3.5 mm plug and 2.4 volts on the middle ring. That is the
situation I'd expect it to be: These mics are usually wired for mic
inputs of soundcards and they carry the bias supply voltage on the
middle ring and the AF output comes from the tip.
. . .
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
