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Author Topic: in search of GBX GD1 preamp and 4123GS guitar amp schematics  (Read 733 times)

rayz1

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in search of GBX GD1 preamp and 4123GS guitar amp schematics
« on: August 14, 2020, 10:08:37 AM »
These components ended up in my hands. Looking to install into a gutted Fender XFL 1000 cab and repower. There is a slight hum that I would like to resolve. May be power supply caps in the preamp, but need information to troubleshoot. Any help finding information on these would be appreciated.

g1

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Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
« Reply #1 on: August 14, 2020, 02:37:08 PM »
Here they are:

rayz1

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Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
« Reply #2 on: August 15, 2020, 11:03:54 AM »
Thank you very much. I will let everyone know how this works out

rayz1

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Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
« Reply #3 on: October 30, 2020, 10:23:45 AM »
I just got myself back into this project. Closer look at the schematics reveal that the GD2 version is not identified in the title block for the guitar driver. Before I get to far I am asking for any information on this. Is there another schematic or is this a omission?

Thanks

g1

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Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
« Reply #4 on: October 30, 2020, 02:26:01 PM »
You had asked for GD1.
Is it GD1 or GD2 that you have?

rayz1

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Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
« Reply #5 on: November 08, 2020, 08:49:38 AM »
Sorry, my mistake. I have the GD2 guitar preamp.
« Last Edit: November 08, 2020, 08:50:57 AM by rayz1 »

g1

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Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
« Reply #6 on: November 08, 2020, 01:44:55 PM »
Ok.  This is all I have for GD2.

rayz1

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Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
« Reply #7 on: November 13, 2020, 03:29:47 PM »
Thank you, I will move forward on the project.