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Old 24th July 2012, 02:36 PM   #121
The Dastardly Dad of Three
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At the risk of ignoring my dads advice ( "no one knows how big a fool you are until you open your mouth"...) it appears to me that the phase is correct as presented in the schematic.
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Old 24th July 2012, 02:38 PM   #122
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... If the output haves were effectively outputing the same signal, there would be no F.B. If one is distorted and the other not, there would be F.B. correcting the distortion
Like the master, I'll try quoting myself. In the previous post I did not mean the 2 1/2s of the output were outputing the same signal. I meant, if they were opposite in phase but the same level and undistorted. They cancel!
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Old 24th July 2012, 02:51 PM   #123
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Originally Posted by kasey197 View Post
At the risk of ignoring my dads advice ( "no one knows how big a fool you are until you open your mouth"...) it appears to me that the phase is correct as presented in the schematic.
Same phase relationships as in the OTL schematic shown in thread #38. Thus, the signal drives to the FETs in F6 are Out of phase.
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Old 24th July 2012, 02:54 PM   #124
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Why is everyone debating whether the phase is correct? Obviously it functions properly. It wasn't designed by a beginner.

Last edited by labjr; 24th July 2012 at 03:17 PM.
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Old 24th July 2012, 03:03 PM   #125
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lalala

possible variations

all with different amount of Zen

some having Mu , some uM , some MuuM



edit : added original Pa's (with title ) sch , redrawn slightly , for easier comprehension
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File Type: jpg F6-SIMPc.jpg (24.4 KB, 954 views)
File Type: jpg F6-SIMP.jpg (67.8 KB, 947 views)
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Old 24th July 2012, 03:05 PM   #126
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So the transformer has become the modulation point.
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Old 24th July 2012, 03:10 PM   #127
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Quote:
Originally Posted by flg View Post
Like the master, I'll try quoting myself. In the previous post I did not mean the 2 1/2s of the output were outputing the same signal. I meant, if they were opposite in phase but the same level and undistorted. They cancel!
exactly why I'm all the time , surprised to the bone

as I wrote , only logical way , to stay on same path , is that upper modulation is attenuated in some way

but , I will not be surprised if Papa say tomorrow that there is ( intentional or not ) mistake on schematic , in secondary phasing

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Old 24th July 2012, 03:11 PM   #128
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Originally Posted by buzzforb View Post
So the transformer has become the modulation point.
more apparatus then point
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Old 24th July 2012, 03:14 PM   #129
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one detail is indicative - existence of +/-V1 and +/-V2
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Old 24th July 2012, 03:20 PM   #130
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one detail is indicative - existence of +/-V1 and +/-V2
What are you getting at? I just thought those input JFETs are a low voltage and a high current. Or maybe there is a pair of 'em for low low source impeadance for the xfrmr. This is good or the JFETs but bad for output power. So, there is a bigger supply for the output.
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