Green vinyl in a tube to stabilize electrolytic capacitors on amp chassis

Discussion in 'Amp Central Station' started by yockoe, Dec 11, 2019.

  1. yockoe

    yockoe NEW MEMBER!

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    I saw a YouTube video where the presenter used a dab of green vinyl paste to keep the electrolytic capacitors from vibrating during amp operation. I forgot to write down the name of the product, the video, or the author (yes, I am very old and obviously very dumb). I am sure it was one of the guys who repair amps but since I watch so many I can't recall which one it was. I am hoping someone on here know what the product was.

    Thanks.

    Jack Isham
     
  2. muchxs

    muchxs Doctor of Teleocity

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    RTV silicone works just fine. It's available in a Cheez Whiz dispenser from your local auto parts store under the Permatex brand. It's available in black which is commonly used as glazier's silicone or high temp red for sealing the cylinder bases on your old VW bus.

    GE sells silicon adhesive and silicone sealant in a tooth paste tube. It comes in clean and white. Lowe's and Home Depot have it.
     
  3. kbold

    kbold Tele-Afflicted Silver Supporter

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    Manufacturers have been blobbing glue to caps for a long time. Long term stability and reliability from knocks/vibration.
    The stuff usually looks like plain old contact adhesive.

    wrt the green paste - never heard of it or seen it. I guess it's a lot more expensive than contact adhesive.
     
  4. mjr428

    mjr428 Tele-Meister

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    Go back and look in your YouTube history, you should be able to find the video again...

    Sent from my LGMP260 using Tapatalk
     
  5. Peegoo

    Peegoo Tele-Holic

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    WARNING: Not all RTV silicone is created equal!

    Most formulas gas off acetic acid as part of the cure process, and that will corrode PC traces, copper wire, and other metal parts.

    The only one that I use that's safe is GE Type II 100% silicone sealant.

    The GE Type I (and most other brands' RTV silicone sealant) is a slow death to any electronic circuit.

    Many manufacturers have made this mistake in the past, but pretty much all makers these days are aware of the issue, so they use GE Type II RTV or DC Molykote silastic compound:

    [​IMG]
     
  6. watercaster

    watercaster Tele-Meister

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  7. BobbyZ

    BobbyZ Doctor of Teleocity

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    The acid thing is something I've also seen mentioned in conversations about Avion and that other aluminum camper. Silicon is not advised.
    On the flip side, with my beat up old Ampeg Reverberocket I gutted the old cap can and put in those little Ecaps Weber sells, then used goodly amount of RTV to hold it all in place. Read about the acid afterwards and by the time I found another 6v6 RR I'd discovered Fliptops and their drop in replacements.
    However that first RR that I got in January 2012 is working great and is my favorite of the two.
    Maybe it's the acid? :)
     
  8. trev333

    trev333 Telefied Ad Free Member

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    what about high temp hot melt glue?.... would that work?...
     
  9. Mad Kiwi

    Mad Kiwi Friend of Leo's

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    A lot of computer / I.T equipment comes with Hot Glue braced components.

    I owudl be surprised if general electrical components got hot enough to cause that to melt to the point of movement.
     
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  10. muchxs

    muchxs Doctor of Teleocity

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    OMG! You mean... all those Dumbles are going to stop working?!
     
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  11. jimgchord

    jimgchord Tele-Afflicted

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    I just use red rtv
     
  12. Eastbound71

    Eastbound71 TDPRI Member

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    upload_2019-12-12_9-24-5.png
    This is the Mil spec stuff we use in the RF Lab where I work. Have used this on many caps and other electronic components without problems.
     
  13. Peegoo

    Peegoo Tele-Holic

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    Every amp stops working :)
     
  14. D'tar

    D'tar Friend of Leo's

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    All this modern high tech stuff kills tone. I use hubba bubba.... chew untill the taste is gone, usually less than a couple minutes, then mush it between the caps and board. Bazooka takes less time to rid the flavor but then you have some light reading for later. The more sugar content left, the sweeter the tone. I cant hear a difference between the two tho. YMMV.
     
  15. tubelectron

    tubelectron Tele-Holic

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    I never use that kind of product in my amps builds. Never !
    I call it a poor job trick for poorly designed amps.

    But it's me, OK ? :D

    -tbln
     
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  16. zook

    zook Friend of Leo's

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    I use this, found at any hardware store:
    [​IMG]
     
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