I lost a keyway on a 60s RCA blackplate 6V6 today, ouch! But I find clear Gorilla glue to be working quite well at re-attaching it. I had good success not long ago with a vintage 5U4 as well. I carefully dab some on the broken off tab, and very lightly apply a slight wetness to the tube base with a toothpick dipped in water. Squeeze them in place for a minute or so and then carefully prop the tube upside down for 2 hours ( I use a couple of rolls of electrical tape). Next day it seems pretty solid. Maybe not as good as new, but certainly enough to get it inserted correctly in the socket. Good stuff that Gorilla Glue.
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repairing broken tube keyways
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Are you aware of this product? They have made them as long as I can remember, I mean even 60 years ago.
https://www.tubesandmore.com/product...ce-octal-tubesEducation is what you're left with after you have forgotten what you have learned.
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Originally posted by Enzo View PostAre you aware of this product? They have made them as long as I can remember, I mean even 60 years ago.
https://www.tubesandmore.com/product...ce-octal-tubes
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Originally posted by mozz View PostViva tubes has them cheaper.
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It's a handy product to be sure. But when I still have the keyway I usually epoxy it back on with a decent two hour epoxy from the hardware store. The five minute stuff can soften with too much heat. I sort of remember trying CA glue once and not being pleased with the result, but I'm not certain."Take two placebos, works twice as well." Enzo
"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas
"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
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Originally posted by Chuck H View PostI sort of remember trying CA glue once and not being pleased with the result, but I'm not certain.
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Crazy Glue is a brand of CA.
CA glues do come in types. A serious hobby shop or online hobby supplier should have a selection. There are the ones that bond in a few seconds, then there are the slow curing ones that give you some time to reposition something. I never used them, but there are also formulas that you can use in places where there are gaps.Education is what you're left with after you have forgotten what you have learned.
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Originally posted by christarak View PostI don't think we have the crazy glue trademark here. Whn I see water activated, I'm think it may be a polyurethane glue. Does crazy glue bubble and expand a bit?
Moved to the US not so long ago and have tried Krazy Glue. It's what we know as Super Glue.
https://en.m.wikipedia.org/wiki/Cyanoacrylate
Edit: We must have simulpost
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Originally posted by christarak View PostAha! We have a good range of CA glues here with different names. It was the water activation that stumped me. Thanks Enzo
I've used CA glue extensively in R/C model airplane building.
Many different kinds/brands, thin, medium, thick, gap filling,etc.
Thin sets fast, thicker sets slower, usually needs activator.
Somewhat new to the market is Q-Bond.
Basically CA glue with a "welding powder".
Works good, sets fast, but very hard (as most CA glues) and can be brittle.
https://www.amazon.ca/Q-Bond-QB2-Q-B.../dp/B00HX704NGIf it ain't broke I'll fix it until it is...
I have just enough knowledge to be dangerous...
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