[ARC5] WWII aircraft microphone and audio circuit wiring question

[WA5CAB at cs.com]

However, headset and carbon microphone cords were not shielded.

In a message dated 09/30/2011 18:34:44 PM Central Daylight Time, 
aaf-radio-1 at aafradio.org writes: 
> >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
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480