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Audio and Video Talk
Valves / Vacuum Tubes
Primary wires to output transformer - which to twist together?
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<blockquote data-quote="Qualityten" data-source="post: 998895" data-attributes="member: 17776"><p>A couple of years ago I built a clone of the Mars EL84 P-P amplifier. I admire the look and neatness of his chassis layout, so I studied and followed the pictures given here: https://www.avforums.co.za/index.php/topic,66441.0.html</p><p></p><p>I later removed the tranformers from that build and to use on a Dynaco SCA-35 restoration.</p><p></p><p>Returning to this build with different UL output transformers, I was a bit surprised to see that I had twisted the two screen grid wires together and the two anode connections together for each side of the amp. Rechecking the pics linked to above, I see that's what Karel has done.</p><p></p><p>I'm very much still a learner, and would appreciate understanding what the thinking is behind this. Does it reduce hum more than if the wires from pins 7 and 9 of each valve are twisted together themselves?</p><p></p><p>Greetings from the UK and good wishes to all for these tough times. I had the privilege of visiting Karel in June last year. How different this year has been.</p></blockquote><p></p>
[QUOTE="Qualityten, post: 998895, member: 17776"] A couple of years ago I built a clone of the Mars EL84 P-P amplifier. I admire the look and neatness of his chassis layout, so I studied and followed the pictures given here: https://www.avforums.co.za/index.php/topic,66441.0.html I later removed the tranformers from that build and to use on a Dynaco SCA-35 restoration. Returning to this build with different UL output transformers, I was a bit surprised to see that I had twisted the two screen grid wires together and the two anode connections together for each side of the amp. Rechecking the pics linked to above, I see that's what Karel has done. I'm very much still a learner, and would appreciate understanding what the thinking is behind this. Does it reduce hum more than if the wires from pins 7 and 9 of each valve are twisted together themselves? Greetings from the UK and good wishes to all for these tough times. I had the privilege of visiting Karel in June last year. How different this year has been. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Primary wires to output transformer - which to twist together?
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