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Old 29th June 2013, 04:29 PM   #4771
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Pumps included.
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Old 29th June 2013, 05:01 PM   #4772
Zen Mod is offline Zen Mod  Serbia
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it is supposed to be amp thread ;

so : http://goo.gl/maps/SPtIQ

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Old 30th June 2013, 02:14 AM   #4773
lhquam is offline lhquam  United States
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Here is an idea for an F6 variant using 2 bifilar transformers rather than 1 quadfilar. Note that the P3 pot is back, to null H2.
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Old 30th June 2013, 02:17 AM   #4774
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That looks like BA3.
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Old 30th June 2013, 02:58 AM   #4775
lhquam is offline lhquam  United States
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Originally Posted by buzzforb View Post
That looks like BA3.
Huh?
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Old 30th June 2013, 03:30 AM   #4776
lhquam is offline lhquam  United States
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Here is a simplified version, with or without cascoding.
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File Type: jpg F6CC-2trans-sch-2.jpg (91.9 KB, 197 views)

Last edited by lhquam; 30th June 2013 at 03:49 AM.
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Old 30th June 2013, 04:52 AM   #4777
lhquam is offline lhquam  United States
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Here is a simplified version, with or without cascoding.
Have I diverged too far from the original F6 design for this to be considered?
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Old 30th June 2013, 08:36 AM   #4778
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No, for my feeling you kept the core!


Very interesting variations!
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Old 30th June 2013, 09:06 AM   #4779
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If you are using reversed complementary fets on the minus side there is no actual need for the transformer.

You are re-reversing it

To be more in the spirir of F6 (same device symmetry etc) I would use the same cascode up and down and just connect rhe down part to the other transformer side

However the transformer feels a bit redundant if we use both complementary parts. It becomes more of a flavour than a practical element.
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Old 30th June 2013, 12:41 PM   #4780
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Quote:
Originally Posted by lhquam View Post
Huh?
THe Jfet FE of BA3 FE is a unity gain phase splitter, sorta like a transformer. Well, if you split into two, that is what you have. Just ramblings of idle mind. I like The F6CC if it can retain the nature of F6 and improve performance.
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