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Audio and Video Talk
Vinyl
rectifiers and their heaters....help please
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<blockquote data-quote="handsome" data-source="post: 51157" data-attributes="member: 772"><p>i , ahem, "found" a center tap on the heater transformer (amazing how blind one can be) and connected the cathodes to it. The rectifier's filament transformer and separate HT transformer are switched on by a solid state zero crossing relay. when operating the amp with the cathode connected to the rectifier heaters there was an audible click when the heaters & HT switched on and a buzzing which i assume came from the filament transformer (the transformers are rather close to one another). disconnecting the rectifier heater-cathode connection gave a silent switch on and no buzz. what gives? i worry about the buzz as it implies to me component stress somewhere....any help anyone? I ahve attached the PSU schematic</p></blockquote><p></p>
[QUOTE="handsome, post: 51157, member: 772"] i , ahem, "found" a center tap on the heater transformer (amazing how blind one can be) and connected the cathodes to it. The rectifier's filament transformer and separate HT transformer are switched on by a solid state zero crossing relay. when operating the amp with the cathode connected to the rectifier heaters there was an audible click when the heaters & HT switched on and a buzzing which i assume came from the filament transformer (the transformers are rather close to one another). disconnecting the rectifier heater-cathode connection gave a silent switch on and no buzz. what gives? i worry about the buzz as it implies to me component stress somewhere....any help anyone? I ahve attached the PSU schematic [/QUOTE]
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Audio and Video Talk
Vinyl
rectifiers and their heaters....help please
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