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In Reply to: RE: Apply this once and you're done. posted by MikeWI on June 27, 2016 at 15:31:44
I own a Fluke 87V meter that has a temperature probe option. I have measured the temperature on the surface of the glass envelope of a huge type 7241 output tube pulling about 0.5 amps of current at steady state in my OTL amplifiers. The glass reaches a little more than 100 degrees C max, which is plenty hot enough to overheat my living room after several hours with a total of 8 tubes running in twin monoblocks. Thus I wonder whether anyone should worry about what happens at 250 degrees C on a tube pin; the pin is very unlikely ever to get as hot as does the glass envelope of any tube.250 degrees C = 482 degrees F. You could broil a steak at that temp.
Edits: 06/28/16Follow Ups:
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I don't recommend it, however.
I just love Walker Audio SST. It sounds real good after 1 hour and even better at 24 hours.
~D
Wherever you go there you are.
Was wondering why no one has yet mentioned it. I also have the Craig solutions, which I use (the cleaner) to clean tube pins before I apply Walker SST. However, I have not worked up the courage to use it on the pins of power tubes, for fear of it being baked on by heat. I do use it on small signal tube pins. I am aware that not everyone loves it, but I am a fan, especially on cartridge pins.
I love Walker SST, but it's a high priced audiophile version of the stuff I use, (Cool Amp Conducto-Lube) which also isn't cheap (and I suspect is the same stuff).
By the way, I use it on everything including power tube pins. The industrial stuff is meant to be used on super high voltage and amperage power lines...so I really doubt you have to worry.
It does have a drawback of being messy if one isn't extremely careful. The Walker and the Cool Amp both need to be used very sparingly. But if one is simply careful and goes slow, the results are dramatic. At least for me they were.
I always suspected that SST was made from the automotive product, "Never Seez" or "Anti-Seize", maybe with some silver flakes added. Those two products already contain nickel, a decent conductor, and are silvery in color. But I am not about to substitute either of those two for SST. The initial cost may be high-ish, but a small container lasts maybe literally forever. (My bottle is going strong after maybe 10 years.) Lloyd sells a tiny vial of Canola oil to refresh the SST, if it dries out, which does tend to happen. Or, you can use Canola oil.
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