NYTOM
Well Known Member
Installing PM 3000 . Have PTT?s on sticks with single unshielded wire that ground to frame near stick. I?m afraid there going to pick up noise so I thought I?d have them trip sub miniature relays right at the intercom so everything will be shielded. The short lines (4?) from the intercom to the relays will be shielded but will the line that is switched by the relay pick up buzz from the relay coil? The only other thing I can think of is running new two conductor shielded lines to each PTT so I can ground to the audio ground and not the power( frame) ground right at the stick. There?s a real science to keeping your audio clear and pure.