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Old 11th September 2012, 10:21 AM   #1031
sonnya is offline sonnya  Denmark
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Old 11th September 2012, 10:31 AM   #1032
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Sonnya,
Didn't know if you would find this interesting. I just happen to be working on Nelson's F6, which uses transformer as phase splitter and came across this while looking around.
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Old 11th September 2012, 11:09 AM   #1033
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Quote:
Originally Posted by sonnya View Post
Excuse me for my lack of participation .... I have been rather busy, as i have been asked if i could design a preamp for hypex modules as hypex don't offer such a solution for there boards.
That's super and very honourable recognition from Hypex, good for them.

I can now tell my friends that I had opportunity to cooperate with Hypex designer.

OK, I'm very still in unrecognizable area but close, just bellow you somewhere.
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Old 11th September 2012, 11:11 AM   #1034
sonnya is offline sonnya  Denmark
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no no no.... It is not hypex that have asked me!
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Old 11th September 2012, 11:17 AM   #1035
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Oh I misunderstood, apologize Sonny

BTW did you have opportunity yet to listen to NC400 module? I only see praises all around the net.

Last edited by Lazy Cat; 11th September 2012 at 11:19 AM.
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Old 11th September 2012, 02:14 PM   #1036
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padamiecki, did you build that circuit or is it only in simulation ?
It has lower distortion then the TSSA circuits i have seen here. I assume the 9mA current sources by pass the 4.7kOhm resistor. Otherwise the output will be totally over biased.
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Old 11th September 2012, 02:21 PM   #1037
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I understand andrew and apply what you suggest(see under). For your value proposal let LC answer...
Marc
Idefixes, the feed-back resistance's position are the worse you can imagine. You could improve a lot distortion by doing something like this:
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Last edited by Esperado; 11th September 2012 at 02:46 PM.
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Old 11th September 2012, 02:42 PM   #1038
sonnya is offline sonnya  Denmark
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The TSSA cannot run with 4.7K in its present state. But it is the way to go, to get more gain.

It is not precise enough in its currentsources...

Maybe version 1.7 will have this posebility.
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Old 11th September 2012, 03:14 PM   #1039
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Yes, that is the major problem of the TSSA, getting more gain without over biasing the output stage. padimiecki put in another twist, he grounded the output.
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Old 11th September 2012, 03:39 PM   #1040
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Originally Posted by sonnya View Post
to get more gain.
What is the min V in we are supposed to get for full power?
775mV rms to fulfill DIN requirements ?
1V to match most of the digital equipment ?
1.25V to match professional symmetrical equipment ?
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