Just curious, does anyone see any problem caps on my aging amp that I should keep an eye on, are any of these tantalum? Or ones that could potentially go due to age?
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Re: See any caps here that I should be concerned about on an aging amp?
The electrolytics all look like "off brand" Taiwanese/Chinese stuff (and 85C rated) that could definitely be suspect. Though audio gear generally isn't too "hard" on caps compared to something like an SMPS so I've seen even "sub par" caps last a long time in audio gear. -
Re: See any caps here that I should be concerned about on an aging amp?
Doesn't really look that old. Looks fine to me
what about the main power board? That is the one you really need to be concerned about. These look like the speaker ampsCap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM meComment
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Re: See any caps here that I should be concerned about on an aging amp?
Wow. Looks so clean. Is that a linear PSU? Ohh it has a pre-amp and those are the full speaker output amps
yeah that looks fine. High quality shit thereCap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM meComment
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Re: See any caps here that I should be concerned about on an aging amp?
It does sound really good, this is my highest quality amp I've ever owned so I don't really have anything to compare it to sound wise to know how good it is. But it's pretty awesome. It does sound good. It does 200w per channel at 8 ohms 3 channels driven per specs, not sure what it puts out in 5 channel mode, so I was thinking of upgrading the big power caps coming off the toroidal since it's 46000uf right now, looks like 23,000uf goes to each side of amp boards. I was thinking of doing something like 2 45,000uf caps instead of the same brand.
But even with these caps, if I power off the amp music will keep.playing for 14 seconds before the caps start to fully drain.Last edited by demoncamber; 01-06-2021, 12:30 PM.Comment
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Re: See any caps here that I should be concerned about on an aging amp?
I read you can use a bleeder resistor, but have more or less no clue how to implement it on this type of amp. Another solution is to turn off the pre-amp before you turn off the main ampCap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM meComment
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Re: See any caps here that I should be concerned about on an aging amp?
Oh yeah, probably, it doesn't bother me though, I have it in a trigger outlet so it powers down when I shut my AVR off, so you can hear the caps drain and kind of fizzle out softly in the speakers after about 14 seconds. It's not loud enough to be annoying though.Comment
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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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Hello!
I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.
The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.
I have studied the board and... -
I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,... -
Good evening
I recently aquired a rev 1.1 Gigabyte 60XT, and was suprised of the amount of leaking caps for a motherboard of the P3 era. Especially the way the 330µf caps seems like the housing discolored even.
Now, there are some 3300µF 6.3V KZG series around the CPU. Would it be OK to replace them with something like EEUFR1A332 ? (Panasonic FR 3300µF 10V). Or was this board designed around very low ESR caps?
But I was also suprised about the bigger boys, which are 330µF 25V.
Could it be they used 25V caps because they were cheaper / available at that time?...
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