So I have a King KY-97a with a sigtronics SPA-400 in an airplane I bought. Issue is that it doesn't have any sidetone, the headset is quiet while transmitting.
So I figure someone wired it wrong and start digging into the rats nest, and eventually separated the radio from the intercom and plugged it in directly. Still no side tone. I adjusted the pot on the top back and forth a few times and still no side tone. So I think the radio might have a problem, but don't want to fling money at it when I can just modify the SPA-400 to have side tone.
So my question is, is this a common problem? Is it reasonable to just work around it in the intercom? Is this something I should have looked at?
Thanks,
schu
So I figure someone wired it wrong and start digging into the rats nest, and eventually separated the radio from the intercom and plugged it in directly. Still no side tone. I adjusted the pot on the top back and forth a few times and still no side tone. So I think the radio might have a problem, but don't want to fling money at it when I can just modify the SPA-400 to have side tone.
So my question is, is this a common problem? Is it reasonable to just work around it in the intercom? Is this something I should have looked at?
Thanks,
schu