Lee Jackson Metaltronix Amplifiers

[Hippybilly]

[b]Just when I thought life was going great with my VL 1002, up jumped the devil and bit me in the cheeks again. When my VL 1002 gets warmed up it starts cutting out, but there are some things that also occurr that may make this easy to diagnose.

When it gets good and warmed up, let say about 30 minutes into playing time, the sound starts acting like a light bulb does sometimes before it goes out, kind half ass working and almost seems like something is going weak and then going out. You can turn the STANDBY switch off and back on again and it will work for awhile longer or sometimes it cuts out again. Also I noticed that turning the PRESENCE switch full left to full right makes it start cutting out or weaking the signal it seems, the further past 12 oclock you go. I don't how these two are wired or related to each other or what have you but it seems like the PRESENCE knob has something to do with my problem too. I don't know if it's the STANDBY switch itself, or a bad cap or resisitor. Any ideas would be appreciated. I don't have a tech for a good 70 miles of where I live so if I can find out what it is and fix it myself it would be great. Maybe Lee will get us that DVD made someday that we so so so really really need, so we can take care of our own amps....wouldn't that be a joy to behold...fix your own stuff when it breaks and not have to take it somewhere and then somewhere else cause that person didn't know what they were doing and so on and so forth. Got some of those amps too, 4 of them. Now nobody can fix them to where they sound good.

Anyway, anybody that can help me I would sure appreciate it, Hippybilly[/b]

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Hippybilly, The Missouri Ozarks

[sloanstewart]

I'm no expert, but check/replace your tubes.
I had a friend experiencing a similar problem and it was indeed his tubes.

[Hippybilly]

Thanks for your reply. I tried so many different types of tubes in this amp searching for tones that I'm very very sure it's not the tubes. The tubes were my first guess too. It just almost acts like the standby switch, but not quite hardly. I would think that the switch would be a work or no work situation and no cutting out or whatever in between, unless it's dirty or arched a black spot on it. Don't guess it would cost anything to see what the switch looks like but time, and I've got plenty of that. I still don't see what effect on this situation that the "presence" control (pot) would have. It seems like, the farther past 12 oclock, clockwise you go, it starts to cut out or weaken the signal down to almost nothing and cut plumb out. I need to look and see if the presence switch and the standby switch are in the same circuit I guess and see what they have in common and why one would affect the other. I give up. I guess I'll go try the last couple of things I mentioned and see what they do. Thanks for your help and if you think of anything else, I'd appreciate all the help I can get. Hippybilly
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Hippybilly, The Missouri Ozarks

[erniebull]

I had the same problem with my VL-1002 :

after 15 min of fine working the sound was suddenly going down to a very low blurry sound .
It took me a lot of techs to find out that it was a bad solder joint in the power section !

It has been resoldered and it is fine now .

[Hippybilly]

Thank you so much for your reply. That's exactly what one of my music buddies said it was. I'll check it out and see what I can come up with. Thanks so much for you reply. Can you get any more specific as to where exactly it was? Just asking. THanks again. I so much appreciate it. Hippybilly
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Hippybilly, The Missouri Ozarks

[erniebull]

I can't be more precise , a tech did the repair .