[Premium-Rx] RA-17xx variants

[Michael O'Beirne]

Dear Clemens

Thanks for the contribution.  The 1773 and 1774 mounted in the strong Creeth
cases were almost certainly for military applications as I don't know of
civilians using those heavy (and costly) cases.

You can see the same case used for the Racal RA329B (the green pained
military version of the RA217D plus FSK/FM adaptor) and with much other
equipment used in the field such as signal generators etc.  The box-like
screw-on lids (fairly water-resistant I think) are perfect receptacles for
storing cables, probes and books in safety.

There was a maritime version of the RA1772 using the requisite narrower
2.35kHz SSB filters in lieu of the normal 2.75kHz filter.  I personally
don't like the sound of 2.35kHz bandwidths, but they play their part when
the amateur bands are very crowded.

I hope the group's learned membership will be able to tell us more on the
American and Canadian variants.  There seems to be very little info on these
sets over in this part of the world.

73s
Michael
G8MOB


----- Original Message ----- 
From: "Clemens" <clemens at it.dk>
To: <premium-rx at mailman.qth.net>
Sent: Tuesday, August 17, 2010 5:50 PM
Subject: [Premium-Rx] RA-17xx variants


>
>
> Michael asked about other types in the series. With so many elephants
> around, I hesitate a little,:-) but feel safe commenting on the -73
> and 74. They must have been aimed either at marine use or for some
> kind of mobile use(!), the radiomuseum site describes them thus:
>
> RA-1773 (RA1773): RA-1771 fitted with MA-1070A connector panel
> providing a fan and front connectors of rear sockets, all in Creeth
> Field Transit Case.
> Similar receivers:
> RA-1774 (RA1774): RA-1772 fitted with MA-1070A connector panel
> providing a fan and front connectors of rear sockets, all in Creeth
> Field Transit Case.
>
> I have been wondering when someone would bring up the
> American-produced types, like 6772, 6772E(R-2130), 6778A,B,C and Q
> (remote), the latter ones Tempest qualified, and the 6778A,etc having
> push-buttons and more memories. Does anyone have the story on
> those?  And on the Canadian RA8772CB?
>
> I could add to common failures, the LED's giving up, but fortunately
> they are 'standard issue', like HP used for instance, so easy to find.
>
> Best,
>
> Clemens S.Ostergaard
> DENMARK
>
>
>
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