Quote:
Originally Posted by G6Tanuki
R209s featured quite frequently in the early-1960s surplus ads in Practical Wireless - at a time when _proper_ Larkspur stuff was still very much in service. I was told that one of the intended roles of the 209 was that its "IF Out" socket would be connected to a RTTY or Radio-Fax decoder. Whether this ever happened I couldn't tell.
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Well, somewhere I have a document showing the R209 was connected up to a WS53 - that monster transmitter with 2 x 813 in the PA - to form a RTTY link. I think that would date back to the late 40s and 50s.
The R209 replaced the R107 as a partner for the WS53, and I suspect it was precisely the availability of that IF output that forced the change. The R107 doesn't have that facility of course.
What the R107 does have - which the R209 does not - is a muting system. I have never understood how the R209 is supposed to be muted when the system is on transmit?
Richard