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Old 19th Oct 2019, 1:02 pm   #15
G6Tanuki
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Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,953
Default Re: Mystery A.M. transformer

Yes the other stage is an audio oscillator - like you said it's set up to tone-modulate the RF-oscillator, so your 'thing' is indeed probably an alignment-aid/test-signal-source for the medium-wave band.
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