Re: mike socket chassis pin question
- From: Jasen Betts <jasen@xxxxxxxxxxx>
- Date: Fri, 17 Feb 2006 18:52:41 -0000
On 2006-02-17, RB <rbig@xxxxxxxxxxxxxxxxxxxx> wrote:
I have an older solid state scanning marine VHF radio I'm trying to get
going again, after years of non-use.
The mike is missing. These radios all used a simple PTT mike---a common
ground, 12+ to one side of the PTT switch, and the audio from one side of
the mike element on the other. Three wires total. I'd like to put a plug
on a CB mike I have and use that for the marine VHF. I have no manual or
schematic, and little chance of finding one (I'm searching).
The chassis mike socket has 5 pins. I can easily find the ground pin. By
powering the set up, I can then find the 12v+ pin. That takes care of two
of my three wires in the mike cable.
Question being, then, how do I determine which of my remaining 3 pins is for
the audio lead?
if the two extra pins aren't for scan up/scan down and don't also read 12V with
the set powered up
select the ohms range, you'll be able to find the ground pin.
if the set has an amplifier mode select that turn it on and probe
the remaining pins on the ohms range, you'll hear when you get it right.
--
Bye.
Jasen
.
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