[ARC5] WWII aircraft microphone and audio circuit wiring question

[Mike Hanz]

On 9/30/2011 1:31 PM, jcoward5452 at aol.com wrote:
> Was the microphone and audio circuits in WWII aircraft shielded?  I've seen remnants of bare shielded wire on some connectors I've had/have.

Yup.  The earlier systems usually described the usage in notes on the 
drawings, rather than showing each input that was shielded.  The 
AN/AIC-4 was more specific about the designation, as you can see at 
http://aafradio.org/docs/AIC-4.html - which shows the microphone and 
high impedance circuits being shielded wire.  The particular aircraft 
wiring booklet would show more specifically by model where it was used.  
The one for the B-29 is about an inch thick....

73,
Mike  KC4TOS