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I think Pete already gave you the best advice. The filter caps are most likely shot! You can dink around all you want but nothing else will help. The amp...
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Ah but Bruce, that sounds complicated! Besides, batteries have more mojo. Especially if you can find some of those old button cell bias batteries from those...
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Numbers like TI107 or whatever are probably what are known in the trade as "house numbers". Normally devices are catalogue items. They have a published...
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"You'll be sor-ry!!"
Have you looked at your plate voltage? When we bias an amp true class A we have...
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Yep! What he said!
Yeah, and if you have a 5R4 it's cheaper to use the resistor than to buy a different rectifier tube. ...
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Merry Christmas, y'all!
Not to disagree with what has been posted but Mr. Stokes started off by saying he did a test relating to voltage, in...
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What Don said! Especially his last point. Bass heads have an output transformer that is about a third bigger and heavier than a lead guitar amp.
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If you're careful it should work fine. The advantage with a cathode resistor is that the voltage on the probes will be millivolts. If something slips and...
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It's always a money thing...
Here's where having sold diodes to manufacturers for years counts perhaps less than simply being OLD! :-)
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