dbegeman
Member
I have an issue that has been bugging me since I bought my airplane a year ago. Unfortunately I didn't realize it was an issue until after the pre-purchase inspection was done and the paperwork signed.
What happens is, when ever I push the PTT button (on either stick) my manifold pressure gauge starts decreasing and the ammeter deflects 180 degrees from zero amps. It does it on either radio (ICOM 200 and a Bendix/king nav/comm) and with the engine running or just on battery power. The ICOM makes the ammeter deflect one way and the Bendix/King the other way but both deflect 180 degrees from zero amps. In addition I have a switch labeled AMP that on the right selection says ALT and the left selection is unlabeled and I have no idea what function it serves. I included pics (and hopefully I can lable them). Any help would be appreciated!!
MAP before pushing PTT
MAP with PTT pushed
Ammeter before pressing PTT
Ammeter with PTT pressed
Ammeter with PTT held down longer and the "AMP" switch in the upper right hand corner.
Thanks in advance,
Dan
What happens is, when ever I push the PTT button (on either stick) my manifold pressure gauge starts decreasing and the ammeter deflects 180 degrees from zero amps. It does it on either radio (ICOM 200 and a Bendix/king nav/comm) and with the engine running or just on battery power. The ICOM makes the ammeter deflect one way and the Bendix/King the other way but both deflect 180 degrees from zero amps. In addition I have a switch labeled AMP that on the right selection says ALT and the left selection is unlabeled and I have no idea what function it serves. I included pics (and hopefully I can lable them). Any help would be appreciated!!
MAP before pushing PTT
MAP with PTT pushed
Ammeter before pressing PTT
Ammeter with PTT pressed
Ammeter with PTT held down longer and the "AMP" switch in the upper right hand corner.
Thanks in advance,
Dan
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