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Audio and Video Talk
Vinyl
rectifiers and their heaters....help please
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<blockquote data-quote="ludo" data-source="post: 51168" data-attributes="member: 691"><p>Handsome, is the 12V filament transformer a split bobbin type or are the windings on top of each other on a single bobbin? I'm thinking a split bobbin will give less capacitance between primary and 12V secondary and should (on account of the extra nylon between pri and sec) therefore be insulated better too. I'm not sure that all makers of small transformers pay equal attention to an unexpected few hundred volts for small low-voltage transformers.</p><p></p><p>I'm a still valve noob and haven't made things like this. Are there some real nasties happening at the junction of the valve cathode and that first choke and 220nF when that diode switches off? Could these be upsetting your filament transformer?</p></blockquote><p></p>
[QUOTE="ludo, post: 51168, member: 691"] Handsome, is the 12V filament transformer a split bobbin type or are the windings on top of each other on a single bobbin? I'm thinking a split bobbin will give less capacitance between primary and 12V secondary and should (on account of the extra nylon between pri and sec) therefore be insulated better too. I'm not sure that all makers of small transformers pay equal attention to an unexpected few hundred volts for small low-voltage transformers. I'm a still valve noob and haven't made things like this. Are there some real nasties happening at the junction of the valve cathode and that first choke and 220nF when that diode switches off? Could these be upsetting your filament transformer? [/QUOTE]
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Audio and Video Talk
Vinyl
rectifiers and their heaters....help please
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