ssh Posted January 27, 2017 Share Posted January 27, 2017 I have a pr of AVVT 2A3s that have wobbly glass (I can wiggle it a little) where the glass meets the base. They sound OK, but do they need repair, and if so, who would do that? SSH Quote Link to comment Share on other sites More sharing options...
EMRR Posted January 27, 2017 Share Posted January 27, 2017 You would do that. Any sort of high temp sealant you can get in the crack, or double down and de-solder all 4 pins at their ends (they are hollow tubes) and pull the phenolic socket loose from the leads, fill with sealant of choice, then re-seat and re-solder the leads. If not too loose, just leave it alone. Invasive procedure maybe more harmful than ignoring. Quote Link to comment Share on other sites More sharing options...
ssh Posted January 27, 2017 Author Share Posted January 27, 2017 Thanks for the response, EMRR. Do I understand correctly that I should simply encircle the glass with sealant where it meets the base? Several years ago, as backups, I bought the last pr JACS had, and have not used them thinking that they need to be powered up with a Variac (which I don't have). SSH Quote Link to comment Share on other sites More sharing options...
thebes Posted January 27, 2017 Share Posted January 27, 2017 Yup. But you want to use something that can stand up to heat. There's something common out there that people use but I can't remember what. Nail polish maybe? Ah senility. Quote Link to comment Share on other sites More sharing options...
Dr Morbius Posted January 28, 2017 Share Posted January 28, 2017 I use a few drops of super glue and a stout rubber band wrapped from the top to the pins and don't touch for 3 hours. So far worked fine for me. Quote Link to comment Share on other sites More sharing options...
dirtmudd Posted January 28, 2017 Share Posted January 28, 2017 17 hours ago, ssh said: I have a pr of AVVT 2A3s that have wobbly glass (I can wiggle it a little) where the glass meets the base. They sound OK, but do they need repair, and if so, who would do that? SSH i hope this helps http://www.jacmusic.com/accesories/Tube-Glue/tube-glue-.html http://www.diyaudio.com/forums/tubes-valves/157600-loose-tube-bases.html Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted January 28, 2017 Share Posted January 28, 2017 Well, how about that. I did not know you could repair tubes. 1 Quote Link to comment Share on other sites More sharing options...
Schu Posted January 28, 2017 Share Posted January 28, 2017 Quote Link to comment Share on other sites More sharing options...
mike stehr Posted January 28, 2017 Share Posted January 28, 2017 I guess that proves silicone sealer won't work. Quote Link to comment Share on other sites More sharing options...
ssh Posted January 28, 2017 Author Share Posted January 28, 2017 Thanks, dirtmud. I don't see the glue in the pricelist. I'll email them. SSH 1 Quote Link to comment Share on other sites More sharing options...
ssh Posted January 29, 2017 Author Share Posted January 29, 2017 That's some expensive stuff when the "small order fee" and shipping is added. About $70. I hope it works. SSH Quote Link to comment Share on other sites More sharing options...
dirtmudd Posted February 1, 2017 Share Posted February 1, 2017 On 1/29/2017 at 2:53 PM, ssh said: That's some expensive stuff when the "small order fee" and shipping is added. About $70. I hope it works. SSH for $70 it better be a lifetime supply. 1 Quote Link to comment Share on other sites More sharing options...
seti Posted February 2, 2017 Share Posted February 2, 2017 On 1/27/2017 at 1:00 PM, ssh said: I have a pr of AVVT 2A3s that have wobbly glass (I can wiggle it a little) where the glass meets the base. They sound OK, but do they need repair, and if so, who would do that? SSH Is that the same one that was wobbly a few pilgrimages ago? They sounded great... I'd get some super glue with a narrow needle like tip and inject it till it fills enough to stick. I did that with an old globe 245 and it is still good. Quote Link to comment Share on other sites More sharing options...
ssh Posted February 2, 2017 Author Share Posted February 2, 2017 Same pr, seti. I just don't want to lose one, so I'm anteing the bucks to fix them. My backup pr is the last pr JACS had. SSH Quote Link to comment Share on other sites More sharing options...
seti Posted February 2, 2017 Share Posted February 2, 2017 13 minutes ago, ssh said: Same pr, seti. I just don't want to lose one, so I'm anteing the bucks to fix them. My backup pr is the last pr JACS had. SSH How many tubes can take that and keep going!!!! Speaking of JACS.... http://www.jacmusic.com/accesories/Tube-Glue/tube-glue-.html Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted February 2, 2017 Share Posted February 2, 2017 13 hours ago, dirtmudd said: for $70 it better be a lifetime supply. Once you start getting close to $100 for a tube repair, consider some new tubes unless these are the uber expensive type. Quote Link to comment Share on other sites More sharing options...
ssh Posted February 2, 2017 Author Share Posted February 2, 2017 Uber $, if you find them. Yes, the JACS repair is what I'm going to do, and I hope it's the last bottle I need. SSH Quote Link to comment Share on other sites More sharing options...
Don Richard Posted February 3, 2017 Share Posted February 3, 2017 High temp epoxy is cheap, available, and works well for this sort of thing. I used Devcon, but something like JB Weld should work fine. It doesn't take much, a little dab will do ya.. 1 Quote Link to comment Share on other sites More sharing options...
minermark Posted February 3, 2017 Share Posted February 3, 2017 13 minutes ago, Don Richard said: High temp epoxy is cheap, available, and works well for this sort of thing. I used Devcon, but something like JB Weld should work fine. It doesn't take much, a little dab will do ya.. And of course you are kidding right? Quote Link to comment Share on other sites More sharing options...
minermark Posted February 3, 2017 Share Posted February 3, 2017 On 1/28/2017 at 10:28 AM, Schu said: Well iv seen everything now. No tube can be "Repaired" ---- The only way would be to remove the glass and re-blow a new envelope, sucking a vacume at the same time of course. You tube has some great tube Mfg Videos for info. If it's even cracked, it's toast, sorry. Quote Link to comment Share on other sites More sharing options...
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