Sorry...sorry...sorry!
Contrary to what I thought , I had too many pre-magnetization on the
three recording heads .
I inserted a 500k potentiometer between 60pf capacitor , 120pF and
220pF and heads, and thus I was able to adjust the pre- magnetizing
voltage applied to each recording heads .
It is true that these heads , instead of presenting a resistance of about
1,000 ohms are only 300 ohms , and I gather that the HF voltage that
was applied to them was too high.
So I consider that my problem is solved.![Thumbs Up](https://music-electronics-forum.com/core/images/smilies/icon_tup.gif)
Sorry to have bothered you with my question ...
Contrary to what I thought , I had too many pre-magnetization on the
three recording heads .
I inserted a 500k potentiometer between 60pf capacitor , 120pF and
220pF and heads, and thus I was able to adjust the pre- magnetizing
voltage applied to each recording heads .
It is true that these heads , instead of presenting a resistance of about
1,000 ohms are only 300 ohms , and I gather that the HF voltage that
was applied to them was too high.
So I consider that my problem is solved.
![Thumbs Up](https://music-electronics-forum.com/core/images/smilies/icon_tup.gif)
Sorry to have bothered you with my question ...
![Thumbs Down](https://music-electronics-forum.com/core/images/smilies/icon_tdown.gif)
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