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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: an interesting journey posted by cpotl on December 9, 2016 at 10:42:04:
Chris, it was a lapsus calami ;) 6.25 it is.
The noise is proportional to the square of the heaters voltage. That's one good explanation.
As for gain, again theory says the signal input at the cathode is amplified by mu-1 thus with pentodes that's way higher than with low mu triodes.
After all the hum is the mains frequency input at the cathode and amplified.
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- RE: an interesting journey - Alex Kitic 13:11:42 12/09/16 (0)
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