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In Reply to: Different bias points? posted by JLH on November 14, 2003 at 09:18:30:
OK I ran curves on the highest and lowest prs. All stock falls somewhere within these extremes in the current shipment of premium globes:
highest: 55ma/-50V/250V
lowest: 43ma/-50V/250VI'm running the 55ma ones in my own amps at this moment.
BTW, of the several thousand 2A3, 300B, 45, KT88, 6550 and EL34 power tubes curve traced from US/China/E. Europe countries, the average spread is about + or - 25%. Of course the higher gain tubes have more variation, lower gain, less.
Brian
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Follow Ups:
Does it necessary mean the higher the 'ma' draw, the higher the output power?
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