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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: New reissue KT88 versus vintage Genelex/Gec KT88 posted by Michael Samra on April 28, 2010 at 17:32:04:
Mike, I don't remember ever biasing NOS TS 6550's to 70-80mA (each?). Unless you are running very low plate voltages (between 300-350 VDC). I like to bias the TS 6550 to around a max IDLE PLATE DISSIPATION of 25-30 watts per tube. For amps that place 500-550 VDC onto the plates, I start at around 35-40mA per tube (for Class AB1, push-pull amps). Then, slowly tweak the bias upwaard and listen to the amp's response.
Amps that run over 600 VDC onto the plates get KT-88's.
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Follow Ups
- " NOS TS between 70 and 80ma " - FenderLover 00:28:36 04/29/10 (4)
- RE: " NOS TS between 70 and 80ma " - Michael Samra 02:42:18 04/29/10 (3)
- And they say guitar ppl push their amps! - FenderLover 06:49:21 05/02/10 (2)
- RE: And they say guitar ppl push their amps! - Jim McShane 07:12:04 05/03/10 (1)
- RE: And they say guitar ppl push their amps! - PakProtector 14:39:19 05/03/10 (0)
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