|
|
Post by Mini-Strat_Maine on Apr 15, 2006 14:32:20 GMT -5
Okay, this isn't "thermioniic valves and their uses," even though there's one in the pic. It's a small problem with my Fender Musicmaster Bass amp that I was hoping you guys could offer some guidance on:  There; better size of photo, and the two tubes put it a little more in perspective. Anyway, that screw on the output transformer has been like that since I got the amp. I'm pretty sure there's at least another nut on the unseen part of it, if not a lockwasher and nut like on the visible part. Unless the screw is supposed to screw into the top of the cabinet and help anchor the electronics to the cab, I have a feeling it's too long to hold the OT properly. I'm also not pleased with the way the socket of that left 6V6 is warped. (The one holding the other 6V6 looks okay.) That's a little more visible in this shot:  Yathink I should hold off taking it apart until I get a replacement socket, and maybe change out that screw and do any other repairs as one big project? And yes, I have "more conventional" pictures of the amp, too. ;D Thanks for any input. |
|
|
|
Post by sumgai on Apr 15, 2006 15:25:38 GMT -5
Doug, A too long screw is ugly, but not necessarily a 'problem child' in terms of holding things together. Yes, it has to have a nut/washer combo on both sides of the xformer tab and the chassis connection - its job is to clamp those two together, and if the head of the screw is not available to do the job...... Either cut if off, or just get a short one that matches the other side. No sense in asking for trouble - your hand will hit it the very moment you are holding a $25 output tube, the shock of which will cause you to drop said tube onto the hardwood floor of your basement shop/den/whatever, and you will be cursing a blue streak for as long as it takes you to find the bolt cutters. Better to find the cutters now, and to use them before you destroy the tube.  As for the socket, if it's distorted in any way at all, replace it, no questions asked. Failure to do so may not cause any damage this year, or the next one, but eventually, you'll wish you had. The tube thus destroyed by the bad socket will cost the same as the one you busted when you hit that long screw, above. ;D Waiting for the damage to occur in the future will not decrease the tube's price.  sumgai EditRemoved reference to image size being too small to see any detail, after Doug fixed the images. /edit |
|
|
|
Post by Mini-Strat_Maine on Apr 15, 2006 17:13:54 GMT -5
Errrr, too huge?? I can barely see it, at 73x102 pixels, it has no details that I can discern. Maybe my browser has something cached, but I'm seeing a rather large image of the screw (bolt?), one tube, and the output transformer. "Okay, now tell me if this lens makes it better {CLICK} or worse."  Pay no attention to that little skinny avatar behind the curtain.  Okay, you've got a good point about replacing all that stuff at once, and before any of it turns into heartburn. I can use the opportunity to change out any aging electrolytics, add tube (spring) retainers, and so on. |
|
|
|
Post by sumgai on Apr 16, 2006 21:42:25 GMT -5
Doug, Good plan, doing the maintenance all at once. But, be sure to test along the way. BTIM, after you've done each step, and while the amp is still on the bench, plug it all back together and try it out. That way, if you make a mistake on one of the procedures, you don't have to try to figure which one you screwed up - it was the most recent one. Good luck. p.s. that image..... I get a tiny picture. The properties shows it to be 73 x 102 pixels. The deal is, if you've stored it on photobucket, and then replaced it with another version of the same name, the new one may not be visible right away. At which point, your guess would be correct, and you would need to clear your cache and try again. Oh, and stop playing optomerist, or their society will sue the bejabbers out of you!  sumgai |
|
|
|
Post by Mini-Strat_Maine on Apr 18, 2006 23:31:24 GMT -5
Forgot that just editing my original post wouldn't bump this back near the top, helping to indicate that I might have corrected that too-small image. So, ("Ramming speed, Mr. Scott!")  |
|
|
|
Post by UnklMickey on Apr 19, 2006 9:35:03 GMT -5
Doug,
"Ramming speed, Mr. Scott!"
"Spock, are you out of your Vulcan mind?" .:LMAO:.
now that i can see the screw, it's apparrent some guy did a bit of shoddy work there.
no doubt they lost the original screw, and that thing was the right diameter.
they were using that nut that's sitting 1/4" above the mounting ear of the transformer to fasten it down.
you could just hold the screw from turning, and tighten the nut down.
but, why bother? get the right length screw and replace it.
you might be able to remove the screws from that tube socket, and bend the ears upward until they're flat,
or just a little past that.
assuming that the wires and component that are connected to the socket aren't too short.
if there's nothing electrically wrong with the socket, and the insulator looks sound,
bending the ears instead of replacing the socket, will save a bit of effort.
if you do replace the socket, consider replacing both of them. that way they'll match. it will look better that way.
unk
|
|
