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Old 21st May 2013, 08:54 PM   #3701
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Hi Uriah!
I did check right now- one of the batteries even does not measure ! It is brand new though.
I will see how is gonna be with another pack. Thanks actually

P.S.: I ll get back to you later regarding LDR, I have some troubles, but it is later.
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Old 22nd May 2013, 01:59 AM   #3702
omishra is offline omishra  India
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Quote:
Originally Posted by voxxonline View Post
Guys, I'm puzzled

Been rolling caps on my b1, everything was fine.
Recently I ve turned it on and had massive hum- had to switch off immediately.
Next day I did check everything, reconnected wires. Everything was fine . Used it for some time.
Few days ago I put my system on and notices weak music goes along with much louder hum. If I increase volume- hum increases.

Strange, cause everything seems to be normal.

10uf caps placed outboard- russian mbgo 2. 1uf is russian 71-4...

What can be the cause of the problem.

P.S. device running off the battery.
Same problem faced by one of my friend. Issues seemed to be the Russian made PIO cap itself. On measurement it was found leaking DC into signal. It was only one channel.
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Old 22nd May 2013, 12:17 PM   #3703
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Ok.. batteries- fine. So I suspect PIO, those outboard caps are leaking. Both
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Old 22nd May 2013, 12:33 PM   #3704
6L6 is offline 6L6  United States
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Replace the suspect cap with one of your older, working ones and see if that solves the problem.
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Old 22nd May 2013, 12:36 PM   #3705
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I will. Thank you. Report to follow.
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Old 22nd May 2013, 02:04 PM   #3706
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Changed to old ones. Hum has gone.
Can be the problem in placing them outboard ? Let's say wires pick up hum (they are short though , 4 cm long) from other components ?
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Old 22nd May 2013, 02:09 PM   #3707
6L6 is offline 6L6  United States
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Probably just bad caps.

Outboard can be an issue, but in this case it's likely not a big problem.
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Old 22nd May 2013, 02:21 PM   #3708
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Going to order another of the same. Mbgo caps are the best sounding indeed
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Old 22nd May 2013, 02:41 PM   #3709
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I used Obliago 10uF PIOs reliable and nice sounding for the output caps and 1.0uF MKPs on the inputs.
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Last edited by KatieandDad; 22nd May 2013 at 02:44 PM.
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Old 22nd May 2013, 03:18 PM   #3710
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Dunno.. maybe can order from different source.
Or obblig's as it was my second choice.
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