https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/ Guitar Noise Discussion Board en-US Thu, 04 Jun 2026 10:15:50 +0000 wpForo 60 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/paged/2/#post-330327 Wed, 03 Jun 2009 00:20:57 +0000 Guitar Repair and Maintenance Ricochet https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/paged/2/#post-330327 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/paged/2/#post-330293 Tue, 02 Jun 2009 18:20:46 +0000 that much. :roll:

I could always see if I can tempt a small child to try it though...]]> Guitar Repair and Maintenance Scrybe https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/paged/2/#post-330293 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330194 Mon, 01 Jun 2009 19:07:39 +0000 Guitar Repair and Maintenance TRGuitar https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330194 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330177 Mon, 01 Jun 2009 16:15:27 +0000
and resistors cost no where near $0.14 -- more like $0.002 to $0.02 depending upon specifics. and this one ain't special.]]> Guitar Repair and Maintenance gnease https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330177 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330153 Mon, 01 Jun 2009 07:23:35 +0000 Guitar Repair and Maintenance TRGuitar https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330153 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330132 Mon, 01 Jun 2009 03:03:35 +0000 should be designed with.
But, no. They're saving $0.14 per unit. :evil:]]> Guitar Repair and Maintenance kent_eh https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330132 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330019 Sat, 30 May 2009 23:30:07 +0000 Guitar Repair and Maintenance Ricochet https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-330019 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-329884 Fri, 29 May 2009 09:36:12 +0000
Oh ... here is a pic of the thing

]]> Guitar Repair and Maintenance TRGuitar https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-329884 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-329791 Thu, 28 May 2009 10:34:28 +0000
I had to take the back off to get working room toe fit the springs and metal cover cap for the ELs back on - I know what you mean about it being pretty dangerous opened up! Fortunately, I didn't have to go anywhere near the danger area, I just needed the back off as the grille which hangs down over the tubes was preventing me from fixing the problem. With that out of the way, fitting everything back together was easy, and I could screw the back on to the amp again safe in the knowledge that I hadn't done anything riskier than replacing the tubes with the back cover still on would have been.

Thanks for the responses. I am (quite rightly) still a bit of a wuss when it comes to amplifier work, so I appreciate the comments and pointers towards schematics and modding info. But I think I'll be leaving the build my own tube amp project until I've gone over physics 101. By which I mean "completed a degree in electrical engineering."]]> Guitar Repair and Maintenance Scrybe https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-329791 https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-329787 Thu, 28 May 2009 09:51:42 +0000
Okay, I'll take another crack at fixing this without taking the back off. The problem is getting the space to jiggle the tube back into place and reattach the little spring - there just doesn't seem to be room to do it. The tube is definitely loose though, as it isn't lighting up and the amp is fuzzing up and going silent intermittently, hence my using the Marshall for a bit instead. I'll report back later and let you know how I get on.

P.S. This forum really is bloody useful...]]> Guitar Repair and Maintenance Scrybe https://guitarnoise.forum/guitar-repair-and-maintenance/blues-jr-tubes-and-taking-back-off-qs/#post-329787