Michael,

Turning the mic on or off won't do anything except make a nice loud pop. 
You will either need to find a PTT lead somewhere on the back of the radio, 
or figure out some way to use the PTT connection from the mic connector on 
the front.  If you're serious about experimenting with other mics through a 
mixer, you may want to visit www.w2ihy.com, where you'll find several items 
of interest.  One of these is an interface box for connecting various 
devices to the mic input of your radio.  The box is somewhat pricey, but it 
contains circuitry for isolating RF from the audio, as well as a gain 
control so you can vary the audio level from the output of your mixer.  The 
box also has an RCA jack which connects to the PTT lead on the mic connector 
so you can key the radio without having to use the PTT button on a 
microphone.

Steve

----- Original Message ----- 
From: "Michael Ryan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, August 22, 2009 20:24
Subject: Adding a Condenser Mic


> Hi all:
>
> I'm thinking of experimenting with a fantim powered condenser
> microphone.
> I'm guessing I'll need some sort of mixer such as a Barhinger 2 band
> equed model (802) which will also supply the fantim power I'll need
> and will allow me to match the mic's input to my TS-940SAT safely.
> What I don't know is: How do I control the PTT action like a
> traditional desk mic like the MC--60? Once piped through a mixure and
> such, I'm sure the mic will activate automatically similar to if the
> switch on the MC-60 is turned on.
> I'm also guessing that switching the mic's power off and on, won't do
> the trick as there is probably a short delay and there will probably a
> noticeable pop on the other end of my DXing and Rag chewing.
> I'm thinking some sort of interface will have to be constructed that
> will allow the mic to be kept on but not keying the transceiver until
> I push a button or something.
> Hope someone can advise me on this or knows someone using a setup and
> can forward me an email so I may contact this individual for
> assistance.  Most likely the person at the music store where I'm going
> to buy the mic, won't have a clew about applying these kind of mics to
> Amateur Radio. (HI)
>
> 73:
> Michael De VO1RYN
>