selfbiassing amp!!

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Uploaded by on Aug 20, 2008

That's what can happen for a common misunderstanding about bias!!
New tubes broken, circuitry broken and output transformer broken!!
If you are not a technician don't try to do yourself!!

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  • 1.21 Giggawatts!!

  • Bellissimo! :D

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All Comments (39)

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  • if you blew your tubes, fried components, and blew the OT then maybe you should have turned off your amp instead of recording it.

  • Mmm sounded like popcorn in the microwave

  • @HarvesterBob and the tubes wasn't new and I had done no changes to the amp bias or something like that.

  • One of my tubes started doing this... does that mean that it's not just the tube that is broken?

  • if i hade a tube amp that hapend than i would not be very happy

  • Some of the new production 6L6GCs have a higher Ip and will need rebiasing regardless, so stick with the same brand and number and company that puts the number on the tubes and you should be OK. Biasing is not exact anyway. There is a range that is OK. Cool and dirty sounding to hot and cleaner sounding to burnem up fast. The burnem up fast setting for bias I get requests for with the Ruby tubes. Self biasing is usually a cathode biased amp. I think you have a set biased amp. It can be reset.

  • My amp is "self bias" yet 2 of the 4 tubes glow purple and make loud popping sounds as if it needs biasing.

  • Wow.That looks like too much anode voltage or a short.Poor amp....

  • @LeonoSalomo There's some companies that put out tubes that are bias tested, and have a number on the side corresponding with the bias. Such as like 1-10. If you get a set of 7's say, and have the amp biased to use them. Then you should be set to not need rebias-ing each time you replace those tubes.

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