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Supersonic Heterodyne radio 1920's.
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16th Mar 2018, 3:29 pm
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Herald1360
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Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,536
Re: Supersonic Heterodyne radio 1920's.
Is it actually an RF amp or is it just being used as the first detector (mixer)?
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