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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: Plate dissipation & tube rolling posted by Ganesh on January 23, 2006 at 07:25:31:
Your calculations of the standing current in your amp are correct. The screen voltage, although it's current draw will participate in the total current draw, can be ignored for biasing.I should mention in passing that you should follow the manufacturer's guidelines on biasing your amp. The reason why I suggest this is that the KT 88/6550 tubes have a maximum voltage rating of 600V at the plate. Now I don't know your amp. But you should know that, depending on the regulation of your power supply, different standing currents are going to affect the plate voltage of your amp. On the one hand, too little current draw could result in increased plate voltage on an amp which is 150V above design maximum. On the other hand, too much current draw could have the output tubes dissipating too much wattage. Anyway, the manufacturer has built your amp. Give them the best chance of resolving the dilemna in order to keep your amp running correctly.
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Follow Ups
- Re: Plate dissipation & tube rolling - corerosin 10:51:29 01/23/06 (2)
- Re: Plate dissipation & tube rolling - Ganesh 12:15:14 01/23/06 (1)
- Re: Plate dissipation & tube rolling - corerosin 10:24:51 01/24/06 (0)
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