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Old 2nd October 2012, 12:08 AM   #2191
lhquam is offline lhquam  United States
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Here is F6 Conceptual Option 5. This might nearly double the open-loop gain.

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Originally Posted by buzzforb View Post
EWE! I forgot about number two.
Never mind. I am going for uber low distortion, then magic SE trick. All will have to wait for completion of M2 bastardo. Nothing like a good fight.
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Old 2nd October 2012, 12:10 AM   #2192
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Clever Ilquam. Toldyou this was tweakers amp.
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Old 2nd October 2012, 12:19 AM   #2193
lhquam is offline lhquam  United States
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I suppose I should cut a bunch of traces on my PCB and give it a try. But I am still tweaking my "original" Teaser-6.

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Clever Ilquam. Toldyou this was tweakers amp.
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Old 2nd October 2012, 12:43 AM   #2194
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No sense of adventure
Mine is torn down and off heatsink. Will build back and compare with few changes. Are you sure that interwinding C is cause of assymetry?
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Old 2nd October 2012, 01:56 AM   #2195
lhquam is offline lhquam  United States
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Using screws into standoffs for power and output connections and a PCB header for the input connector, I can completely tear down, modify, and reconnect in about 4 minutes plus the modification time. No soldering required, except for the PCB mods, of course.

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No sense of adventure
Mine is torn down and off heatsink. Will build back and compare with few changes. Are you sure that interwinding C is cause of assymetry?
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Old 2nd October 2012, 01:58 AM   #2196
lhquam is offline lhquam  United States
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I have new and novel idea to attack the interwinding capacitance issue. I should be able to report in a day or so.

Stay tuned to this channel!

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No sense of adventure
Mine is torn down and off heatsink. Will build back and compare with few changes. Are you sure that interwinding C is cause of assymetry?
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Old 2nd October 2012, 01:59 AM   #2197
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Sounds nicely done. Still not liking it as much as F5? Have you fiddled with p3 on f5 or have measurements to compare the two?
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Old 2nd October 2012, 02:06 AM   #2198
lhquam is offline lhquam  United States
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I have not twiddled much with P3 on the F5 because the pots are not instrumented (ie. no readout) for repeatable evaluations. I have added 10-turn pots and dials to my F6 Zen pots to do more listening experiments.

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Sounds nicely done. Still not liking it as much as F5? Have you fiddled with p3 on f5 or have measurements to compare the two?
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Old 2nd October 2012, 06:35 AM   #2199
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Quote:
Originally Posted by Zen Mod View Post
...some of possible variations are already shown here :
F6 Amplifier
but , without severe limitation of upper Jfet's modulation , you can hardly have any decent output ; and even then , efficiency of amplifier will be simply awful ; depending of said modulation limitation/attenuation , you'll have anything between total silencer and simple CCS loaded amp...:
Don't take it bad, Zen Mod, though you might be a little bit responsible of Antoinel barking up the wrong tree cause in phase driving should'nt seriously be contemplated like in the post you point at.

Last edited by bobodioulasso; 2nd October 2012 at 06:48 AM.
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Old 2nd October 2012, 07:28 AM   #2200
Zen Mod is offline Zen Mod  Serbia
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that was my hysteric attempt to make sense from Pa's repeatedly confirmed but still incorrect schmts

catch is in fact that I'm/we are often thinking too much about hidden agenda behind his decisions , putting unnecessary burden on his shoulders
there is no reason that he must be serious and uber-responsible all the time ......



conclusion - there is nothing wrong with good olde quasi push-pull ....

http://youtu.be/VXjb0aI57tQ
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