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Old 16th March 2012, 10:23 AM   #1721
Salas is offline Salas  Greece
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As long as you got no buzz from a transformer field over the signal wires, do as you please.
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Old 16th March 2012, 06:04 PM   #1722
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I've a component selection very similar to yours, try those caps...



Sadly no, too much reverbs.

Maybe Silmic first version (ROS)
Why not use the Mundorf M-Lytic Bi-polar? Those are really good and have low ESR

Do
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Old 17th March 2012, 01:50 PM   #1723
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Wired my Tx directly to dcb1. No luck getting better results.
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Old 17th March 2012, 02:01 PM   #1724
Salas is offline Salas  Greece
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Is there anything wrong periodically with your mains quality maybe? So your system comes and goes over a few weeks?
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Old 17th March 2012, 02:15 PM   #1725
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Siberia - maybe a few very good result ion Jpegs would help look for any nasties.
Is there a cap across the AC, like .0033 to 0.1uf X or Y rated?
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Old 17th March 2012, 02:25 PM   #1726
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Should check the mains don't go south and the Vin - Vout margin drops too much is one thing.
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Old 17th March 2012, 04:09 PM   #1727
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Those comes and goes always had a reason that I or we have discovered eventually. Bad grounding, badly soldered wire, etc... Mains quality never played a role on it.

How do I check the "going south" thing?

These are most recent measurements:

VDC -10.30; + 10.24
VACin -16.60; +16.72
DCout -1.6; +0.9

Here are some pictures.

http://wtrns.fr/BroYUZKEF8JCGU

I could additionaly make every angle you ask.
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Old 17th March 2012, 04:41 PM   #1728
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I can't get rid of the feeling that something is wrong with my DCB1. It seems I've been here before: lack of articulation in rhythm, weak slam and bass. It's almost like somebody would play the drums with cotton buds.
Do you have different shunt resistors to try?

While those naked Vishays are the best for direct signal path I don't think they're as good for shunt... you need something that sounds bolder like PRPs or carbon films IMHO.
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Old 17th March 2012, 05:00 PM   #1729
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ClaveFremen, do you mean current setting resistors?
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Old 17th March 2012, 11:11 PM   #1730
Salas is offline Salas  Greece
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Quote:
Originally Posted by Siberia View Post
Those comes and goes always had a reason that I or we have discovered eventually. Bad grounding, badly soldered wire, etc... Mains quality never played a role on it.

How do I check the "going south" thing?

These are most recent measurements:

VDC -10.30; + 10.24
VACin -16.60; +16.72
DCout -1.6; +0.9

Here are some pictures.

http://wtrns.fr/BroYUZKEF8JCGU

I could additionaly make every angle you ask.
The way you checked is OK. Shows your mains are high enough to give margin. Regarding the pictures, maybe its better you solder the in/out wiring directly under the PCB on the connectors pads? Since you say it was always a contacts or good grounding thing, maybe worth a try.
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