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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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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: 6GM8 mu follower with AC filaments with no hum posted by john8417 on December 4, 2006 at 04:42:29:
No hum is no hum, which is always good, but 6GM8 is an indirectly heated triode I believe, so it has a heater rather than a filament. Assuming that hum through the heater is capacitatively coupled, there should be a cancellation effect when the tubes are stacked and the signal comes out mid way between the top and bottom tube.But, I have never had much problem with AC on heaters of indirectly heated triodes. I built a DC supply for IDHTs on my first headphone amp, but later wondered why I had bothered.
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- Re: 6GM8 mu follower with AC filaments with no hum - Perseo 06:13:31 12/04/06 (0)
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