Re: R210 Larkspur receiver
For details on the design of the R210 see: J.A. Knight, "HF Band Communication Journal", A.T.E. Journal, April 1958. The A.T.E Journal was the house journal of Automatic Telephone and Electric Co., which later merged with Plessey. I have seen the article, but do not recall if I have a copy. It was referenced by Pat Hawker, G3VA, in his wonderful article "Trends in H.F. Receiver Front-ends". R.S.G.B. Bulletin, September 1963, pp 161-167.
73 John
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