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Re: LF: A transductor instead of a traditional variometer on VLF/LF/MF?

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Subject: Re: LF: A transductor instead of a traditional variometer on VLF/LF/MF? Done!
From: DK1IS <[email protected]>
Date: Mon, 16 May 2016 10:56:49 +0200
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Hi Wolf,

Am 15.05.2016 um 14:12 schrieb Wolfgang Büscher:
Interesting application .. but wouldn't the operation of such a simple transductor (wound on a single ferrite core) depend a lot on the 'RF drive' itself, and / or have different influence on the positive and negative half wave ? Transductors for mains frequencies (as used in Theaters for electric lighting, long before the semiconductor age) used a balanced configuration, so the satturation appeared symmetric for both half waves. I think the Alexanderson alternator at Grimeton uses a similar principle for the modulator (keying). So for a high-power application, one would possibly need two ferrite rings, RF coils "anti-parallel" (with opposite DC magnetisation).
So did Stefan by using an 8-formed winding for the DC excitation!

Tom, DK1IS

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