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Audio and Video Talk
Valves / Vacuum Tubes
Home build of Mars EL84PP
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<blockquote data-quote="Ampdog" data-source="post: 918873" data-attributes="member: 144"><p>;D ;D ;D ;D ;D ;D ;D</p><p></p><p>Karel, yes, as said an engineering solution; not sure that it would fetch high marks in an exam paper. But sometimes one's patience with oneself runs out. When I looked at the whole caboodle of wiring and transformer placement, I simply did not relish the prospect of re-doing the lot. I then hunted and finally came up with using an earth wire with a loop in it, and started roaming all over the show. Came a at certain position in 'space' where the hum suddenly diminished - and mounted said coil accordingly. This was under the chassis near the power transformer, which was a C-core jobby. Such transformers usually exhibit relatively a low leakage field<em> when assembled correctly</em>; not sure why there; </p><p></p><p>still.</p><p></p><p>P.S.: You would know that I was fortunate; the above is not a universal solution. Phase also appears in the picture, and one is stymied when stray induction is of both an L- and a C-nature.</p></blockquote><p></p>
[QUOTE="Ampdog, post: 918873, member: 144"] ;D ;D ;D ;D ;D ;D ;D Karel, yes, as said an engineering solution; not sure that it would fetch high marks in an exam paper. But sometimes one's patience with oneself runs out. When I looked at the whole caboodle of wiring and transformer placement, I simply did not relish the prospect of re-doing the lot. I then hunted and finally came up with using an earth wire with a loop in it, and started roaming all over the show. Came a at certain position in 'space' where the hum suddenly diminished - and mounted said coil accordingly. This was under the chassis near the power transformer, which was a C-core jobby. Such transformers usually exhibit relatively a low leakage field[i] when assembled correctly[/i]; not sure why there; still. P.S.: You would know that I was fortunate; the above is not a universal solution. Phase also appears in the picture, and one is stymied when stray induction is of both an L- and a C-nature. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Home build of Mars EL84PP
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