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In Reply to: RE: In Pentode, G2 is of prime importance posted by gusser on August 7, 2012 at 11:24:02:
"We are looking at a total voltage difference of 0.22v in the upper example and 0.1v in the lower."
Actually we are looking at .021 for the upper and .045 for the lower in the first 12.5ms
This stepped response has little to do with the behaviour of a power supply operating audio vacuum tubes.
Having said that;
The longest, slowest, most sustained current draw increase would be the first 1/4 wave of the lowest frequency of interest or 20Hz.
The first 1/4 wave increases the current draw but the increase takes time, 12ms.
The second 1/4 wave decreases the current draw back to the idle current level with the third 1/4 wave decreasing the current draw and the last 1/4 wave increasing the current draw back to the idle current level.
If we look to see what happens to the voltage in both given examples, the supply that is the slowest to "settle" is the supply that drops the least voltage in the first 12.5ms which is the voltage drop within the time frame we are interested in.
P.S. The first PS example sims very quickly (only takes a few seconds to complete) using PSUD2 while the second PS sims very slowly (it took over 480 seconds to complete). This indicates a inherent flaw with the design of the second PS filter.
Tre'
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Follow Ups
- RE: In Pentode, G2 is of prime importance - Tre' 12:09:29 08/08/12 (7)
- RE: In Pentode, G2 is of prime importance - rage 13:17:15 08/09/12 (6)
- flaw in the power supply - Tre' 17:30:05 08/10/12 (0)
- RE: In Pentode, G2 is of prime importance - drlowmu 13:24:22 08/09/12 (4)
- excellence, "near perfection" in the G2 power supply - drlowmu 10:06:56 08/11/12 (0)
- RE: In Pentode, G2 is of prime importance - rage 13:31:13 08/09/12 (2)
- Photos of the 1970's Paoli 60M amps - drlowmu 09:14:20 08/10/12 (1)
- RE: Photos of the 1970's Paoli 60M amps - alexthegreatm62@hotmail.com 21:14:33 09/04/12 (0)
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