[GreenKeys] Collins 709D-1 FSK keyer & 706A-1 TU

[WA5CAB--- via GreenKeys]

Duncan,

Unless you are older than I think you are, you may have never actually seen 
an AN/URA-8, which consisted of two CV-60's and a CM-14.  AN/URA-8(*) is 
sorta like the R-274(*)'s, over which fights have been known to break out 
between someone who had one of the models that was an SX-73 and someone else who 
had one that was an SP-600 derivative.  About the only thing common between 
AN/URA-8 and AN/URA-8A/B is that they were the same size, same color, and 
used the same external connectors.  I always liked the CV-60 better than the 
CV-89.

None of which answers your question, of course.  The only reason I can 
think of is that the CV-89 was FM and not limited to 850 cps shift.  Which 
someone in the Navy decided was important.

In a message dated 12/04/2014 19:55:40 PM Central Standard Time, 
duncanancy at earthlink.net writes: 
> George,
> 
> Thanks for your comments on these Collins FSK units. You seem to be the 
> only one to know about them.  Apparently Collins did not make many of 
> the 706A-1 TUs, but if they were so much better than the URA-8, makes 
> one wonder why.
> 
> Do you know anything about the 600 hz shift capability??
> 
> Thanks &73,
> 
> Duncan
> K2OEQ
> 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20141205/1f107f1a/attachment.html>