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Old 8th July 2012, 03:59 PM   #1591
Siberia is offline Siberia  Lithuania
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Quote:
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Hey, Nice setup dude
I can see "my" Allen minimalistic replicas running at the outputs

nAr
Another benefit perhaps. I can use them because of much lower Zout as compared to previous setup. Un grand merci for those and the caps. A good deed is not forgotten.
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Old 8th July 2012, 04:10 PM   #1592
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Another benefit perhaps. I can use them because of much lower Zout as compared to previous setup. Un grand merci for those and the caps. A good deed is not forgotten.
You're welcome hope you can have a good time listening to some nice lps

AnaŽl
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Old 8th July 2012, 06:42 PM   #1593
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Added 1K to R9 in parallel. Q3 reads:

C 10.8; 10.9V
B 9.4; 9.3V
E 8.75; 8.65V

Looks like more in the ballpark?
Changing R9 is a bad idea. It is part of the RIAA equalization network, as Wayne gently pointed out to me earlier in this thread. You should leave its value alone.

To adjust your bias you may instead lower R10. See my post #1180.

THEN report on the sound

By the way, congrats for a beautiful build.
Pierre

Last edited by PierreQuiRoule; 8th July 2012 at 06:46 PM.
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Old 8th July 2012, 07:01 PM   #1594
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Thanks! Will definately try. Should I try to lower it to 3K3 like you nearly did?
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Old 8th July 2012, 07:10 PM   #1595
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Why not. You want Vc > Vb > Ve for Q3. I got my transistors from Pass Labs, so what worked for me might work for you too

Pierre
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Old 8th July 2012, 07:16 PM   #1596
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I've got some 6K8, I could try paralleling with R10.
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Old 8th July 2012, 07:20 PM   #1597
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I've got some 6K8, I could try paralleling with R10.
Sounds about right (4k or so for R10). Don't forget to put 499 back in for R9.

Pierre
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Old 8th July 2012, 07:33 PM   #1598
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Oups, I'm terribly sorry ! I let out the wrong correction accidentally.
Luckily Pierre is here to correct my mistakes

Tomas please report voltages after mods (my repair mistake, sorry, I really apologise) and Pierre's right correction

Best,

nAr
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Old 8th July 2012, 07:44 PM   #1599
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So here we are. Q3:

Vc 7; 6.9
Vb 5.4; 5.4
Ve 4.7; 4.8
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Old 8th July 2012, 07:47 PM   #1600
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Originally Posted by nar View Post
Oups, I'm terribly sorry ! I let out the wrong correction accidentally.
Luckily Pierre is here to correct my mistakes

Tomas please report voltages after mods (my repair mistake, sorry, I really apologise) and Pierre's right correction

Best,

nAr
You must be joking! There's nothing to regret. We live and learn and I've learned a lot from you.
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