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Vintage threads from the first ten years
| previous: lion I tried to wire up the B+ dropping ... -- 2/10/2000 12:02 PM |  |
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Re: Dropping B+ problem!
 2/11/2000 7:10 AM |
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Tracy | Re: Dropping B+ problem! Lion I used this B+ dropping method in a silver face deluxe. It lowered the voltage about 35 volts but it took a 70 volt zener to do it. I was able to use a 5ar4 rectifier instead of the specified 5u4gb. I think your problem may be in the bias supply. I had to increase the supply side resistor in the bias supply, if I remember correctly. Try the mod without the power tubes. check the voltages on the plates and bias supply before and after. Tracy |
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| D.P.Coyle Trying to drop the b+ of a power s... -- 2/11/2000 7:14 PM lion Thanks for the replies! |