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Audio and Video Talk
Vinyl
rectifiers and their heaters....help please
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<blockquote data-quote="Ampdog" data-source="post: 50973" data-attributes="member: 144"><p>Pweh (or however it is spelled),</p><p></p><p>Leaving the heaters plus transformer winding floating <em>might</em> have been the problem. It would have depended on the capacitive coupling between the heater winding and the primary, and to which side of the primary - not a good idea for things to be floating there. I see in the specs that 6D22S can tolerate 600V c-h continuously, so one may connect them to ordinary grounded heaters - although I would be a bit apprehensive. But in your case that is not a factor. (I do hope the transformer is as well insulated!) In your case - cathodes presumably connected together - it will make no difference how you connect the cathode(s) to heaters; either end of 12V; c.t. between heaters ....</p><p></p><p>I would be more concerned with the tube sockets and wiring. I would use ceramics, and with pins 3-4 and 5-6 adjacent, would be quite careful regarding insolation. The maximum voltage there is >700Vp, plus possible spikes coming along. Things need to be clean around there, and avoid spiky connections to the socket terminals; wire ends sticking out, etc.</p></blockquote><p></p>
[QUOTE="Ampdog, post: 50973, member: 144"] Pweh (or however it is spelled), Leaving the heaters plus transformer winding floating [I]might[/I] have been the problem. It would have depended on the capacitive coupling between the heater winding and the primary, and to which side of the primary - not a good idea for things to be floating there. I see in the specs that 6D22S can tolerate 600V c-h continuously, so one may connect them to ordinary grounded heaters - although I would be a bit apprehensive. But in your case that is not a factor. (I do hope the transformer is as well insulated!) In your case - cathodes presumably connected together - it will make no difference how you connect the cathode(s) to heaters; either end of 12V; c.t. between heaters .... I would be more concerned with the tube sockets and wiring. I would use ceramics, and with pins 3-4 and 5-6 adjacent, would be quite careful regarding insolation. The maximum voltage there is >700Vp, plus possible spikes coming along. Things need to be clean around there, and avoid spiky connections to the socket terminals; wire ends sticking out, etc. [/QUOTE]
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Audio and Video Talk
Vinyl
rectifiers and their heaters....help please
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