I noticed in some power supplies the caps are glued together and glue to some other components. What do you recommend for this? Is there a brand or something. I didn't want to just pull out the hot glue gun.
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Re: what do you use to glue together caps
Silicone caulk. Pick a favorite color and have at it.
I'm partial to "Melon Green"
veritas odium parit -
Re: what do you use to glue together caps
^
I usually use the gray RTV high temp stuff. A hot glue gun is also suitable.<--- Badcaps.net Founder
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Re: what do you use to glue together caps
isn't that glue stuff just there to hold the caps or whatever in place during manufacturing..?!
PS: @ Topcat: your SAI2 dual Tuali board is up and running my NAS and other stuff
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Re: what do you use to glue together caps
In some cases it looks like it keep components apart from touching each other. I'll grab some high temp black RTV
Thanks
JBComment
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Re: what do you use to glue together caps
Actually it's in the last steps that it's applied.
IMO Its' purpose is twofold -
It keeps any oscillations from the choppers from being heard. The hissing and buzzing some folks can hear, a lot of times it comes from the coils and caps.
It also keeps the parts from moving during transport so they don't strike each other or the heat sink. The output coils have enough mass that striking the heatsink would badly damage them.
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Re: what do you use to glue together caps
get the permatex ultra.it has an alcohol cure rather than acid.Comment
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Re: what do you use to glue together caps
in addition ... the "glue" also keeps the parts from vibrating and breaking off leads due to handling/shipping/normal use .
a fair a mount of mass on top of a couple of skinny legs that is free to move around is not a good thing .
think "pendulum" .
i use hot glue or silicone rubber (the acetic acid type) . a trade name is GE RTV type 1 .
the silicone rubber that smells a bit like ammonia is worthless in my book .Comment
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Re: what do you use to glue together caps
yes ... i remember those too .
do you remember the zenith triplers that would last for 1-6 months and fail ?
they pulled them and did a re-design . as i recall they had a clip-on cover for some leads .
then there were those four lead white tubular "buffer caps" ... they made a smart move going to the sprauge "orange drop" style .
the electrolytic cap and resistor in the horizontal drive to the HOT was standard fair for replacement too .
you are correct about the acetic acid crystals ... the method i use is to apply a thin layer , up off the board and only on non-conductive areas of components ... not just blobbed on .
thorough curing is important .
i do not recommend it for very high voltage areas (multi-KV range) .
although properly cured , it is ok for rf work .
hitachi sent out their version of HV silicone rubber with each replacement kine for their projection sets .
it was used on the second anode connector .
the stuff had a very light ammonia-like smell to it . it was great !
it was not at all like the caulking compounds one finds at home depot .Comment
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Re: what do you use to glue together caps
So what are you guys saying , the red high temp RTV is no good ?Comment
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Re: what do you use to glue together caps
you can play it on the safe side and use the high temp hot glue .
the reason i mention the high temp hot glue sticks is that i "borrowed" a stick from my girlfriend's artsy-craftsy stuff ... the stuff was still soft and tacky 5 minutes after i applied it !
the method i use with the rtv can be a bit exacting for some people , but i have had good results over the years .
something that is bad to use is "contact cement" ... mitsubishi and a few others had some bad go-arounds with the stuff over the years .Comment
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Re: what do you use to glue together caps
Most RTV nowadays is alcohol based the vinegar smelling stuff can still be bought but luckily the selection is slim. Even on the tube it says for 80s cars. I know the orange Permatex RTV is acetic acid based.
Permatex Gray or Black would work fine. I actually had to remove and apply the stuff on a 27" Panasonic TV I repaired in 09 I think. The main IC had it applied across the pins on one side. I guess it was to prevent arcing? It was basically the whole TV on one SMD chip.
It was gray like RTV to I reapplied gray RTV after I replaced the IC.
For caps I use hot glue especially when a cap is bent over or if it's a large top heavy bent over line cap. I put a little bed of hot glue underneath and push the cap down in it. Unlike silicone the cap will simply pull off with a bit of force should it need to be removed in the future.
Hot glue creates a solid but removable bond.Last edited by Krankshaft; 01-31-2011, 07:13 PM.Elements of the past and the future combining to make something not quite as good as either.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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