[R-390] R-648 and roll call

[Meir WF2U]

Check out the previous messages about the R-648. Fred Osterman has a number of inaccuracies in several receivers in the book. He is incorrect regarding the R-648 original purpose. As shown in the original documentation, the purpose was to provide an auxiliary tunable receiver with digital frequency display (albeit mechanical) with accuracy and stability close to those of the main HF radio, which was a digitally step tuned transceiver. 
The R-648 was simply a different, modern, (then) state of the art approach to an airborne HF receiver, while preserving the manual tunability. 

73, Meir WF2U
Landrum, SC


On December 13, 2015 8:53:01 AM EST, Clemens Ostergaard <clemenso at gmail.com> wrote:
>As long as we are standing up and being counted, I might as well chime
>in.
>Still here, but down to two R-390A's now, a mid-town apartment not
>being as
>permissive an environment as I used to have. So instead of 65 boat
>anchors,
>I have 6,5 now. Decimated it is. But they are gone to good homes all
>over
>Europe.
>
>Yet I have always looked for an R-648 (and still am) Not many around in
>Europe. It is certainly not off-topic, building so much on the bigger
>box
>beloved by us all. In the wonderful new 800-page (4th) edition of
>"Shortwave Receivers Past & Present. Communications Receivers
>1942-2013",
>that Fred Osterman sent out last year, he comments that it was to
>replace
>the BC-348, and points to the review in Electric Radio Feb 2000.
>
>Have we heard from Roger (Ruszkowsky) in this round? So much to learn
>from
>him, and such a great way he has to share his knowledge.
>
>Best,
>
>Clemens S. Ostergaard
>(now) Copenhagen
>Denmark
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