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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
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Old 9th June 2018, 05:44 AM   #361
Samuel Jayaraj is offline Samuel Jayaraj  India
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Quote:
Originally Posted by Zen Mod View Post
SEF

this one goes in prototype
Refer to post #264.

Zen Mod, I tried this circuit all over again with new home etched PCB and exact values, parts etc., just two days ago. The amp biased at 2.5 Amps, measured with an Ammeter in the positive rail.

Sounded forward and a bit dry, compared to M2. I also felt that it was a bit compressed on dynamics compared to M2 output stage. Just my two cent. Thanks.
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Last edited by Samuel Jayaraj; 9th June 2018 at 05:46 AM. Reason: missed out the quote
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Old 9th June 2018, 08:37 AM   #362
Zen Mod is offline Zen Mod  Serbia
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
tnx for follow up!

as I wrote , that circuit is going in prototype ......... which means- it needs optimization - regarding Iq and THD spectra

for Iq - 2A5 is too much ...... 2A is acceptable and maybe sweet spot

then Shade thingies (R6, R8) needs further attention
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Old 9th June 2018, 03:10 PM   #363
Zen Mod is offline Zen Mod  Serbia
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
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File Type: jpg WP_20180609_15_33_03_Pro.jpg (84.6 KB, 267 views)
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Old 10th June 2018, 03:48 PM   #364
indra1 is offline indra1  Indonesia
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Quote:
Originally Posted by generg View Post
How do you see this in Spice?
Quote:
Originally Posted by indra1 View Post
Left positive, right negative, ...
Dear Generg, I don't know what happened, I just found that (after upgrading to LtSpiceVII) my statement in #175 is only correct on inverting systems (fundamental phase close to 180 deg.). On non-inverting system with (fundmental phase close to 0 deg.), a positive 90 phase on second harmonic like your left picture on #174 corresponds to negative phase. You can confirm your system with fundamental null tool jcx shared at Spice simulation post #361.
Sorry ...
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Old 10th June 2018, 03:53 PM   #365
indra1 is offline indra1  Indonesia
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Originally Posted by Zen Mod View Post
Nice trick with the jumpers.
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Old 10th June 2018, 06:39 PM   #366
Zen Mod is offline Zen Mod  Serbia
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
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Old 14th June 2018, 03:37 PM   #367
Zen Mod is offline Zen Mod  Serbia
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