Tubes Asylum

Bad Idea

98.109.49.164

Maxamillion

In Reply to: RE: Yes - good idea with DHTs. posted by Sherwood Forest on October 31, 2014 at 12:23:54

I wouldn't use a caulk that released Acetic Acid anywhere near electronics. Just begging for corrosion issues.

Follow Ups:

RE: The Monster Amp - Sherwood Forest 15:23:06 10/31/14 (3)
Never seen any corrosion issues from that at all. It only releases acetic acid (vinegar) as it cures, which is maybe a day. Manufacturers use it all the time to stick caps directly to circuit boards. Heck, look inside a modern Fender amp, you'll see it in all sorts of places.

I'd be more worried about heat buildup than anything else. Anyway, this guy was a very solid tech, so he's thought all that out. He primarily used that trick on just the highest gain stages in guitar amp combos, where the speaker directly rattles the tubes.
- NASA Advises Against it - Maxamillion 08:37:23 11/01/14 (2)
  Why tempt fate when non-corrosive alternatives exist?
  - https://code541.gsfc.nasa.gov/Uploads_materials_tips_PDFs/TI (Open in New Window)
  - RE: The Monster Amp - Sherwood Forest 11:06:03 11/01/14 (1)
    Huh. Food for thought I guess. I've never seen a problem with it. NASA are no dummies, though. My guess is that it is only with certain metals and certain stupidly extreme environmental conditions.
    
    Heck, I have a couple of 25+ year old Mercedes where the electronics modules were factory sealed with the stuff. No corrosion.
    
    Besides, look, I'm not saying that this trick is for everyone. I've never done it because I just hate silicone caulk, the stench and the mess. But I'm talking about placing it between glass (practically inert) and little metal tube shield (fifty cents, who cares if it DOES oxidize). There's not a whole lot of opportunity for damage here. If you can put it on a circuit board and after 20 years, it doesn't eat the copper traces, I'm just not gonna worry about it on a tube.
    
    Anyhow, never tried the teflon tape. I'm gonna give it a shot and report back.
    - RE: The Monster Amp - wkhanna 10:19:01 11/15/14 (0)
      I might be concerned the tube would run hotter.
      ----------------------------
      
      Practicing Curmudgeon & Audio Snob
      ......just an 'ON' switch, Please!

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