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Old 16th September 2012, 08:02 PM   #1901
Antoinel is offline Antoinel  United States
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Is this thread going/gone quiet [globally]? A lot of subjective, objective knowledge and learning has been accomplished [and taught] todate by lhquam, buzzforb, Zen Mod and countless other DIYers. lhquam; Did you reach your destination and achieve your goals?
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Old 16th September 2012, 08:13 PM   #1902
buzzforb is offline buzzforb  United States
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I started a new thread as not to clog this one further for new folks signing in. ZM hinted at the fact that the article may be viewable soon, so it will be good to keep this clean.
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Old 16th September 2012, 08:17 PM   #1903
Zen Mod is offline Zen Mod  Serbia
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it's a Sunday

sittin' on terrace , eatin' apples and watchin' John Carter
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Old 16th September 2012, 08:25 PM   #1904
Antoinel is offline Antoinel  United States
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Thanks buzzforb. I saw the thread and will visit it. ZM. Enjoy.
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Old 16th September 2012, 08:30 PM   #1905
Zen Mod is offline Zen Mod  Serbia
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'twas joke for article

didn't meant to press Pa

I can bet that at least 5 greedy boyz looked at FW site

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Old 16th September 2012, 08:31 PM   #1906
buzzforb is offline buzzforb  United States
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It was OK movie. +1 on article
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Old 16th September 2012, 09:02 PM   #1907
lhquam is offline lhquam  United States
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With the adjustments made in post #1889 F6 Amplifier, the sound is much improved. After listening for an evening, I am getting much happier with this amp. I still have one channel that isn't so good that I am working on. I do not know if the problem is with the output R100s, the xformer, or something else. As soon as both channels are performing well I can declare victory.

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Is this thread going/gone quiet [globally]? A lot of subjective, objective knowledge and learning has been accomplished [and taught] todate by lhquam, buzzforb, Zen Mod and countless other DIYers. lhquam; Did you reach your destination and achieve your goals?
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Old 16th September 2012, 09:49 PM   #1908
bobodioulasso is offline bobodioulasso  Europe
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[QUOTE=I do not know if the problem is with the output R100s, the xformer, or something else. [/QUOTE]

I thought it was clearly the R100s when you swapped them.
Something new makes you hesitate?
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Old 16th September 2012, 10:32 PM   #1909
lhquam is offline lhquam  United States
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You are right about the problem moving with the R100's. While I have the boards off of the amp right now, I think I will remove the R100's and measure their transconductance and a few other parameters. I expect delivery of additional R100s tomorrow. I will solder in some 3-pin Molex sockets to make the exchange of output FETs easier.

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I thought it was clearly the R100s when you swapped them.
Something new makes you hesitate?
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Old 16th September 2012, 11:16 PM   #1910
Nelson Pass is offline Nelson Pass  United States
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You don't need to remove the R100's, just measure the AC voltage Gate
to Source and compare it to the AC voltage across the source resistance.

At 100 Hz, a cheap ac voltmeter will do it.

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