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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Restoring a Traynor YBA-1A: EL34's @ 560Va 535Vg2 ?!?!?! posted by Alpha Al on April 14, 2007 at 20:52:51:
"Does the zener also affect the bias supply?"Yes it does! Thank you for waking me up!
If the bias supply is derived from a tap, then there likely will not be enough raw voltage left over, depending on how large a zener is used. You can always change it to use the entire transformer winding, though you might want to switch to a higher voltage diode. Obviously, a resistor or two will need to be changed as well.
If the bias supply is already derived from the entire winding there might be enough adjustment left to bias the tubes the way you want. OTOH it might be necessary to change the dropping resistor to bring it up a little.
Thanks again for bringing this up.
-- Dave
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- Re: Restoring a Traynor YBA-1A: EL34's @ 560Va 535Vg2 ?!?!?! - Dave Cigna 04:42:41 04/15/07 (0)
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