Our Four place intercom is packed with features only found in much more expensive units.
A few years ago I purchased a four place intercom (Nav-Data) from Aircraft Spruce. Recently the toggle switch appears to have started failing. Something in the switch is causing the PPT to stay on even when I dont have the PPT pressed. It happens when I toggle over to radio (pilot). However, the co-pilot cant here me when its in the middle. I purchased the intercom and push-to-talk (also a Nav-Data product last month) from AirCraft Spruce. I jammed up the airways at the Prince George airport and got a serious lecture from air traffic controller. They thought my PPT was stuck, but I know its the toggle switch (or something associated with it) is failing when on the radio side. I had to unplug it to stop it from transmitting.
Not worth the money. Terribly noisy, can barely understand instructor, also distorts radio
No, you cannot run two intercoms and have them work together. A portable intercom is intended to override the panel mount intercom. Your best bet is to buy a four place intercom and have everyone in the cabin plug into it and plug the intercom into the pilot side panel jacks.
Yes, you would not need any additional components to communicate with 3 other headsets aside from the 9v battery to power it.
The Nav-Data 4 Place intercom will only work off the 9v battery plus a failsafe feature in the event of dead battery.
To use this with the H10-36 helicopter headset, you would need adapter part number 11-10650.
No, this unit uses a 9V battery as it's power source.