[Milsurplus] Bendix interphone question.

[Mike Hanz]

Jack Antonio wrote:
> Two questions.  
> First, anyone have any info or a manual for the Bendix model 3611 Interphone
> system?

Yup.  I loaded circuit and theory to
http://members.cox.net/mymhh/Bendix%203611%20Interphone%20Amp.GIF
(might have to cut and paste this URL).

> Second,  the station boxes for this system refer to a TR-9. This is 
> probably a British or Canadian radio, what is it?

Dunno.  The 3611 was the standard interphone system for commercial 
airlines (and a few Navy aircraft) in the years surrounding WW2, so it 
was teamed with a variety of equipment.  Not much to it (like most of 
the WW2 interphone sets except the AN/AIC-5) but it offers a nice way of 
getting speaker capability from the "earphone only" receivers of the period.

Best 73,
Mike