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g&l preamp

D

dudelove

Apr 16, 2010
467
4
Greenland, Nuuk
#1
so, i came to burn out the preamp on my g&l tribute l2500
and needed one, problem is im living in greenland (the Greenland)
and i been searching for new or parts, but i cant find any places on web, and it wont help to ask my local music store

i been mailing g&l, guitarsbyleo, and some dealers in scandinavia and germany and sweden with out luck

so im thinkin to try another preamp, but i dont know what to use, if anyone know one it will be great to get info
 
#5
dudelove said:
so, i came to burn out the preamp on my g&l tribute l2500
and needed one, problem is im living in greenland (the Greenland)
and i been searching for new or parts, but i cant find any places on web, and it wont help to ask my local music store

i been mailing g&l, guitarsbyleo, and some dealers in scandinavia and germany and sweden with out luck
Click to expand...

The burned part of the preamp must be the opamp. The images on the internet shows that opamp is socketed on most G&L preamps. Can you confirm this and the type of the opamp?
Maybe someone here can send you a replacement opamp.

http://www.talkbass.com/forum/f38/g-l-l2k-preamp-459487/#post6122666
 
#7
dudelove said:
so, i came to burn out the preamp on my g&l tribute l2500
and needed one, problem is im living in greenland (the Greenland)
and i been searching for new or parts, but i cant find any places on web, and it wont help to ask my local music store

i been mailing g&l, guitarsbyleo, and some dealers in scandinavia and germany and sweden with out luck

so im thinkin to try another preamp, but i dont know what to use, if anyone know one it will be great to get info
Click to expand...

"burning out" the preamp on this almost always means you scorched the op amp. It's the little 8 pin "bug" that either plugs in to a socket (if you are lucky) or is soldered in if you are not.

Note that you CANNOT replace the whole preamp without either a major rewiring of the bass (which makes it QUITE different) or by buying one from G&L (yes they do sell them, I don't know for how much). This is NOT a normal preamp but is a special high-boost only unit. It has two levels of high boost: moderate and strong.

I've scorched one or two of mine and in one sense it's a minor fix. You just get some more chips from Mouser, pop a new one in the socket and be on your way.

OK, now the gory details. First is to determine what the chip number is. This depends on how old the bass is. Older ones use a discontinued part you can't get! Another company makes a replacement for it that is actually better. I bought several of those for my basses. They are quite inexpensive. (few dollars each) And recent basses seem to use a smaller newer board with a different chip. The chip number is on the top somewhere. You may need tech help for this.

And speaking of tech help, in my cases chips were NOT in sockets this means it takes some skill to get the old one off the board without damaging the circuit board! A temperature controlled soldering iron and a solder-sucker are virtually required. And I'd URGE you once the old chip is out to install a chip socket because it is almost CERTAIN that without a socket the next time you try to replace the chip the copper will come loose and ruin the circuit board. So depending on your electronic skills you may or may not need some help with this. If the chip is already in a socket no help will be needed!

Good luck.
 

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