Intercom Question

Y adapters for the headphones are easy. Y adapters for the microphones are
well nigh impossible.

What does Sigtronics have to say about extending the intercom to the back
seats?

Jim




wrote in message ...

On 6-Aug-2005, "RST Engineering" wrote:

It would help if you would post the make and model of intercom.

Jim

That would be a Sigtronics SPA-400 STO, mounted in a 1976 PA28-161
Warrior.
The instructor that checked me out in the airplane had a nifty adapter he
said he picked up at Radio Shack that allowed my wife riding in back to
plug
in the headphone portion of her headset in a "Y" adapter and so share his
intercom audio jack. It didn't have anything for the microphone plug
though, so she couldn't talk to us, she could just listen in on our
conversation.

"RST Engineering" wrote

Y adapters for the headphones are easy. Y adapters for the microphones
are
well nigh impossible.

How about a true Rube Goldberg solution?

Use the Y for the headsets, and make up two boxes (and wires to go from the
front to the back) that has a cord to plug into the intercom and a jack
receptacle and a momentary switch(with a normally open and normally closed)
in each one. Press the button, and you get to talk, and cut out the
possibility of the other mic being hot at the same instant. Make two; one
for each side.

I know, Jim; try not to cringe! (I can see you doing it, right now!) g
--
Jim in NC

The Y adapters we've got have both mic and headphones. I'm trying to find
where we got them. I know it was off the web, and I think the place was in
Arizona. They weren't cheap, but they do the trick. I'll keep digging.
Jim B

http://www.pilotproduct.com/page2.htm

Has several options. Not what we have, but similar.
Jim B

"Jim Burns" wrote in message
...
The Y adapters we've got have both mic and headphones. I'm trying to find
where we got them. I know it was off the web, and I think the place was
in
Arizona. They weren't cheap, but they do the trick. I'll keep digging.
Jim B