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.