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Old 10th Feb 2019, 2:10 pm   #7
Jon_G4MDC
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Join Date: Nov 2015
Location: Welwyn Garden City, Hertfordshire, UK.
Posts: 2,013
Default Re: Drake TR-4C - PTO problem

Thanks for the enlightenment about variable pitch inductor winding to linearise the tuning.
I have some Swan rigs that use these and I always wondered how they got it so good.
I have never taken one apart - maybe I should now
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