Gibson Ranger GA-20T Clone thread

Discussion in 'Shock Brother's DIY Amps' started by ArcticWhite, Oct 1, 2020.

  1. ArcticWhite

    ArcticWhite Tele-Afflicted

    Posts:
    1,017
    Joined:
    Apr 14, 2009
    Location:
    Portland Oregon
    I've started gathering materials for a GA-20T build, and I'd like to draw a layout before starting.
    I found some pretty good pics of the front of the turret board, but none of the back side.
    Anyone have one of these amps, willing to take a picture of the back side of the board?
    You'd be internet famous!

    1959-gibson-ga-20t-ranger-tweed_360_6494b7511f787d02173d0134dc0fa144.jpg IMG_20201001_020910.jpg

    Here's the schematic.

    Screenshot_20200929-225157_Drive.jpg
     
    Last edited: Oct 1, 2020
  2. NSB_Chris

    NSB_Chris Tele-Meister

    Age:
    55
    Posts:
    294
    Joined:
    Sep 2, 2017
    Location:
    New Smyrna Beach Florida
    Do you understand how the tone circuit works? It looks interactive between the two channels. It looks like there are two schematics for the GA-20T and one of them has a simple tone after the channels mix.
    http://www.0rigami.com/gg/ga20t.jpg
     
    ArcticWhite likes this.
  3. dkevin

    dkevin Tele-Meister

    Posts:
    250
    Joined:
    Mar 13, 2011
    Location:
    Seattle, WA
    I will repost a GA-40 board layout.JPG layout here, even though it is not the 20T . It is the GA-40 which is nearly identical except for V1. The 20T uses a 12AY7 in V1 while the 40 uses a 5879. I think I have also seen a GA-20T layout drawing like this one but I can't remember where...anyways, I hope this drawing helps somewhat in your work.
     
    janglemore and ArcticWhite like this.
  4. ArcticWhite

    ArcticWhite Tele-Afflicted

    Posts:
    1,017
    Joined:
    Apr 14, 2009
    Location:
    Portland Oregon
    You're correct, there are two GA-20T schematics. I think the one below is the earlier, two tone cabinet.


    20201001_094104.jpg

    I think I'm going to build the later version, the Tweed one as featured in this video.

     
IMPORTANT: Treat everyone here with respect, no matter how difficult!
No sex, drug, political, religion or hate discussion permitted here.