Aircraft Intercom

j_dunavin

Member
2005-10-10 11:27 pm
Has anyone ever tried to make an intercom? Or at least a mic, with headphone circuit?
Since I am building my own aircraft, why not build my own intercom?
here is a link the to the aircraft:
Pietenpol Air Camper - Wikipedia, the free encyclopedia

And here is a link to an intercom from David Clark:
David Clark ISOCOM
The link to the manual has a schematic at the end.

I took a look at it and the parts, and aside from one NPN transistor, everything can be found on Digikey for cheap. And I found the replacement for that one NPN.
I duno could be a fun project.
The plan so far is to go with WW2 style cloth helmets with throat mics.
Like this:
Bell's Aviation, LLC: Army Air Corps, US Navy, and USAF Flight Gear, Clothing, and Equipment
Bell's Aviation, LLC: Army Air Corps, US Navy, and USAF Flight Gear, Clothing, and Equipment
Bell's Aviation, LLC: Army Air Corps, US Navy, and USAF Flight Gear, Clothing, and Equipment
I think I could use this schematic, and add a copilot volume and squelch control.
Any thoughts?
Would either have to wire PTP or make my own PCB....
 
Intercoms for homebuilt A/C

It the intercom is connected to the panel mounted avionics, I would only use a Sigtronics or Isocom. They have aux inputs and outputs as well. Thes will handle A/C conditions, and won't interfere with tower communications.

A DIY intercom for passengers and background music would be a great idea too, especially with a pair of lightweight noise cancelling hedphones, such as one of the Headwise projects.
 

j_dunavin

Member
2005-10-10 11:27 pm
It depends.
For an experimental aircraft, it does not matter, Except when you are regarding electronics that deal with ATC. Those would be the transponder, ELT, nav, and comm radios, ect. Since those devices are over the air, the FCC also has a lot to deal with that.
The intercom is not regulated, at least for an experimental aircraft, because even if you loose that devise you could still communicate with ATC through your radio.
Another interesting fact, is if you look at that schematic, when you turn off the intercom the off switch will take the radio input and bypass it straight to your phones.
A regular aircraft is totally different, when it comes to "approved" electronics.
Everything has to be tested, and come with a piece of paper saying so. See then it's trackable.