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Old 4th March 2013, 04:16 PM   #1461
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Quote:
Originally Posted by Marra View Post
Thanks for the tip NS heres a couple of less fuzzy pics.
[/IMG]
OK fair enough undervare is ok maybe just one day off and is that 32DD maybe better picture is needed.
But Red soks no please
(only joking neh!)
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Old 4th March 2013, 04:23 PM   #1462
Marra is offline Marra  United Kingdom
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Old 4th March 2013, 04:33 PM   #1463
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Hat off to you Sir!
own you a pint just for sound sense of humor.
Sorry is in the Pub (no not realy) could not resist.
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Old 4th March 2013, 06:18 PM   #1464
zoe is offline zoe  United States
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Quote:
Originally Posted by lehuy173 View Post
So do I. There is hum when I connect input signal. I cannot fix it.
When I turn my amplifier off amplifier keeps playing for a few seconds but hum stops immediately so I thought to much ripple in ps so I wired in a few chokes I had for a speaker project 2.7mh plus one more bank of caps this dropped my voltage down to 29v at output to amp boards but also added more filtering for dc I also removed ground bar from one side of first part of ps as this was creating a loop.
Hum is very low now but still there. I bought these caps at surplus store and I don't know there ripple rating. Here's a picture. I also wired in one more MU3020 bridge so now one transformer -bridge is powering positive ps and the other the negative.The bias seems more stable now. This may also be from the amp settling in as it's new.
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File Type: jpg 2-28-2013 amp 020.JPG (591.1 KB, 269 views)
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Old 4th March 2013, 07:55 PM   #1465
nrg2009 is offline nrg2009  United States
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wow... capacitors galore. nice job soldering those fat copper wires. This could be a case study of how to make a power supply.
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Old 4th March 2013, 08:04 PM   #1466
Zen Mod is offline Zen Mod  Serbia
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or - how to not

positive , gnd , negative takeout points to amp pcbs - all of them need to be on two last caps in filter

expand that pic , open it in Paint or other graph proggie , mark and write down function of each wire and post it here

then I'll tell what and where to re-locate
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Old 4th March 2013, 08:14 PM   #1467
oiphy is offline oiphy  Norway
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I would tend to agree with Zen on this one... this looks like a mess for us who didn't build it.

Not claiming that what I do is better....
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Old 4th March 2013, 08:31 PM   #1468
zoe is offline zoe  United States
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Thanks Zen Mod! I'm not able to manipulate pictures but I can mark wires and post new pictures with marked wires.would that be acceptable?
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Old 4th March 2013, 08:32 PM   #1469
Zen Mod is offline Zen Mod  Serbia
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just put some tapes on wires with numbers on them
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Old 4th March 2013, 10:08 PM   #1470
zoe is offline zoe  United States
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Quote:
Originally Posted by Zen Mod View Post
just put some tapes on wires with numbers on them
1 = + side from first bridge
2 = - side from first bridge
3 = - side from second bridge
4 = + side from second bridge
5 = + input to first choke
6 = - input to second choke
7 = + output from fist choke to + caps
8 = - output from second choke to - caps
9 = amp board ground
10 = amp board ground
11 = + output to amp board one
12 = - output to amp board one
13 = + output to amp board two
14 = - output to amp board two
15 = ground to ground bridge
16 = cap ground connector
The other wires are speaker outs and rca inputs
If this is not clear let me know and I'll elaborate.
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File Type: jpg arch rock 2-2-2013 005.JPG (587.5 KB, 230 views)
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