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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: Re: RIAA design dilemma, need your opinions. posted by Thorsten on February 19, 2002 at 11:06:15:
It's been more than 40 years since I messed with contact (grid leak) bias. As a youngster, the tube circuits I built (AM radio) invariably used contact bias. The grid leak resistor was always 2.2 MOhms, even on a 6AQ5 "final" which had supplementary cathode bias. Obviously, my experience was not HIFI, but my memories of a 6AN8 using the pentode as a grid leak detector and the triode as a driver for the 6AQ5 are clear. The thing worked fine with no cathode resistor on either section of the 6AN8. IMO, it's definitely worth a try.
Eli D.
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Follow Ups
- Grid Leak Bias - Eli Duttman 11:57:39 02/19/02 (2)
- Re: Grid Leak Bias - pedroskova 06:17:58 02/20/02 (1)
- Re: Grid Leak Bias - Eli Duttman 10:43:47 02/20/02 (0)
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