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Audio and Video Talk
Vinyl
Advice needed on "strange" tube amplifier bias system
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<blockquote data-quote="Ampdog" data-source="post: 67498" data-attributes="member: 144"><p>Ghostin,</p><p></p><p>Then I can only repeat that the circuit above does not make sense - for bias regulation or anything else connected directly to tube pins. (One presumes it is for bias because of the implied negative output leads.) As F_D said, in the circuit he sent the only transistorised circuit is a kind of regulated voltage step-down circuit using a BU... transistor, feeding the input and driver stages with about +300V.</p><p></p><p>So sorry for that, I cannot help further.</p></blockquote><p></p>
[QUOTE="Ampdog, post: 67498, member: 144"] Ghostin, Then I can only repeat that the circuit above does not make sense - for bias regulation or anything else connected directly to tube pins. (One presumes it is for bias because of the implied negative output leads.) As F_D said, in the circuit he sent the only transistorised circuit is a kind of regulated voltage step-down circuit using a BU... transistor, feeding the input and driver stages with about +300V. So sorry for that, I cannot help further. [/QUOTE]
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Audio and Video Talk
Vinyl
Advice needed on "strange" tube amplifier bias system
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