[ARC5] Receiver audio transformers and other stuff.

[WA5CAB at cs.com]

Bill,

AFAIK, if you don't count MFP treatment, there were only three known 
official modifications made to any of the receivers after they entered service.  
The first was the conversion by 8th AF of the frequency coverage of some 
BC-455's.  The second was the installation of the motorized tuning on certain 
R-26, R-27 and ARA equivalents.  That was done during the War.  The third was 
the addition of ground straps to the receiver dynamotor shock mounts.  
That's most commonly seen on BC-453-B's and I think was done post-War.  If anyone 
can think of a fourth...

Robert D.

In a message dated 01/20/2013 15:06:54 PM Central Standard Time, 
wrcromwell at gmail.com writes: 
> On Sun, 2013-01-20 at 13:06 -0500, WA5CAB at cs.com wrote:
> >Bill,
> >
> >The missing output transformer was part of the "customizing" AKA
> >hacking.  None were ever made without one or the other of the four
> >transformer variants.
> >
> 
> Hi,
> 
> Thanks for your reply. I suspected none of them were built that way. I
> don't know if somebody yanked out a good transformer for some funny mod
> or used that circuit because the original transformer opened. Ken was
> asking about open transformers. Was there actually a mod that called for
> getting rid of the output end of the radios? Maybe somebody didn't know
> how to use a matching transformer.
> 
> 73,
> 
> Bill  KU8H
> 

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