Help with dropping B+ with Zeners

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sluckey
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Re: Help with dropping B+ with Zeners

Post by sluckey »

I usually aim for 100%. I like my tubes crunchy and well done! :lol:
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xtian
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Re: Help with dropping B+ with Zeners

Post by xtian »

Get a little heat sink compound under that MOSFET and it will be even happier.
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Dr Tony Balls
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Re: Help with dropping B+ with Zeners

Post by Dr Tony Balls »

xtian wrote: ↑Fri Jun 09, 2023 7:57 pm Get a little heat sink compound under that MOSFET and it will be even happier.
That's what i'm doing right now. I can leave the amp for an hour or so and the temperature of the MOSFET is plateauing at ~125°F (~52°C), which I think should be satisfactory (its not in an area in danger of being touched).
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bepone
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Re: Help with dropping B+ with Zeners

Post by bepone »

Dr Tony Balls wrote: ↑Fri Jun 09, 2023 5:03 pm
bepone wrote: ↑Fri Jun 09, 2023 5:02 pm nice..but whats about 95.8% bias??
not sure the question. For a cathode biased amp I usually shoot for 95% dissipation. Do you or others disagree?
bias for any class and any condition, must be under 70-80%.. also A .. you are not getting any more power, just generating heat and shortening tube life ..
but ofcourse you can put also 120% if you want :mrgreen:
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