Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Schematics and Layouts => Topic started by: rayz1 on August 14, 2020, 10:08:37 AM

Title: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: rayz1 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.
Title: Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: g1 on August 14, 2020, 02:37:08 PM
Here they are:
Title: Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: rayz1 on August 15, 2020, 11:03:54 AM
Thank you very much. I will let everyone know how this works out
Title: Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: rayz1 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
Title: Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: g1 on October 30, 2020, 02:26:01 PM
You had asked for GD1.
Is it GD1 or GD2 that you have?
Title: Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: rayz1 on November 08, 2020, 08:49:38 AM
Sorry, my mistake. I have the GD2 guitar preamp.
Title: Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: g1 on November 08, 2020, 01:44:55 PM
Ok.  This is all I have for GD2.
Title: Re: in search of GBX GD1 preamp and 4123GS guitar amp schematics
Post by: rayz1 on November 13, 2020, 03:29:47 PM
Thank you, I will move forward on the project.