Thread: Drake SSR-1
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Old 3rd Sep 2017, 6:21 pm   #1
n_highfield
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Join Date: May 2010
Location: West London, UK.
Posts: 102
Default Drake SSR-1

Just acquired one of these for no better reasons than it was only twenty quid and I have never had a Wadley loop receiver before.

I looked around the internet before it arrived and there are apparently two versions - one all bipolar and with a slightly odd system for the 1 MHz harmonic generator of an astable multivibrator directly synchronised to a 10 MHz crystal osc. The other version with mosfets in the local oscillators and a rather more sanitary harmonic generator using a 7490 decade counter between the crystal and astable oscs.

Curious to know which type I had, I pulled the cover off as soon as it arrived; neither - yes to bipolar local oscs but a 'kludge' board on the back of the harmonic gen with the 7490 on it!

NHH
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