Quote:
Originally Posted by CarbonMike
Was this GEC's one and only attempt to produce a comms receiver?
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There may have been another one other than the RC410 family.
On p. 165 of his article "Trends in Receiver Front-ends", RSGB Bulletin, Sept 1963, pp. 161-167, Pat Hawker mentioned, but did not reference, a paper given by A. Cormack of G.E.C. The paper was titled "An H.F. Receiver and Synthesizer designed for use on H.M. ships", I.E.E. Convention on H.F. Communication, March 1963, pp. 299-306.
Pat's interest was in the design of the front-end and its strong signal handling performance. The design was single conversion with a 1.6MHz i.f. and a synthesizer which tuned in 100Hz steps. The paper does not go into the design of the synthesizer, noting that it had already been described elsewhere, ie E.S.Carint and E. Ribchester, "The Synthesis of High Purity Oscillations Suitable for Single Sideband Receivers", J. Brit. I.R.E March 1961, Vol. 21 No. 3, pp. 237-240.
I wonder if this receiver was a forerunner to the RC410 ?
Sadly the papers from the 1963 Convention are very hard to find. I know of only three copies in libraries in the U.K., and the British library does not appear to have one. The convention was organised by the Electronics Division of the I.E.E, and they published the papers as E.D. 4 (as shown on the spine), and not as a set of I.E.E conference proceedings which had recently been started. This was the first I.E.E convention on H.F. Communication since the Radiocommunication Convention in 1947 (J. I.E.E. Vol 94, 1947,part IIIA, Nos 11-16)
Finally, there was some discussion about the RC410 in a thread last year. See:
https://www.vintage-radio.net/forum/...d.php?p=940172
with some serious history from Synchrodyne.
73 John