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

[DK1IS <DK1IS@kabelmail.de>]

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!

73,
Tom, DK1IS