Eaglebeak

It was factory mounted on press-fit studs on side of wheel well, then covered by a panel so as not to be kicked by co-pilot - see photo enhancement of two of the studs.

Found it! On the M20M, it is located behind co-pilot panel, left of rudder pedal, covering the nose-gear wheel well. Thanks for all your feedback!! Now to troubleshoot this baby...

Yes. Thanks!

Thank you for your input. I didn't see it behind the panel control head initially, which led me to check the POH's distance to datum. This was why I thought Mooney might have installed it at a different location further from panel. I will check again.

And... However, where is it installed? I want to avoid ripping out instrument panel to follow wires from controller to the box and possibly break something else. I'm hoping someone who had one taken out of their Mooney might provide a location.

With or without engines running? Both Only on Intercoms or also on Comm? When power is on to Intercom. Comm works fine (Pilot and Emergency only) when circuit breaker to intercom is pulled. Have you had engine work done lately? Problem started about 10 hours after annual. My temporary remedy is to disable intercom by pulling breaker. Then I attached an old 4 port portable intercomm and PTT switch to Emergency Jack and Mike.

Would anyone happen to know where the factory installed DRE 468 intercom box is located on the M20Ms? It doesn't appear to be adjacent nor behind to the DRE controller on the instrument panel, nor is it on the Pilot side panels. POH indicates it should be 30 inches from datum, whereas instrument panels is about 17 inches from datum. I am trying to troubleshoot high volume static noise and want to isolate box from wires to make sure it isn't something as simple as an intermittent ground short.