Behringer GDI 21 SIMPLE-Boost-Mods

[snyder80]

Maybe this aint no news for some readers, but there is a dead-easy mod, that enhances the tonal variation (not realy the quality, though it could sound better through your amp, dunno):
You can have

1. A British mode, that is much more cleaner und not that compressed, by twiddling the AMP selector inbetween the tweed and british mode. So when u use the britisch modified mode, it gives you some sort of boost to the stock and compressed british mode. If u like the sound, open the back and solder 2 wires to bottom LEFT pinouts from the AMP-switch and the two other lugs to a jack with a switching option. That way the "boost" can be footcontrolled.

2. A real boosting option for all the three Sound-modes:
Twiddle the MOD-selctor in between the CLN and HI G-mode. It sounds much more open and loder than the HI-G (as the CLN MODE is, too).If u want it to be footswitchable, solder two wires to the bottom RIGHT pinouts of the MOD-selector and to a jack with swithing option like mentioned above.

Hope that helps someone....

PS: Maybe someone know some other "hotspots" to maybe add a Mid-Poti or other mods ... (best would be to get rid of the british harshness)

[alex frias]

Oh, Gosh...
You are the StratPickupSwitcherManiacUpToThePedal?

[snyder80]

no, why do you ask for

By the way, it realy sounds fuller and more open on this clone.
Maybe it works on the original Sansamp GT2 - and could already be a well known "Mod"

[teddybear]

any pics for mod?

[alex frias]

Well, I've just tested it and... CONGRATULATIONS!!!
It works just the way you described it.
Ingenuous.

[snyder80]

@ alex frias

Nice that you like it. Its realy simple but give more fun...

@ teddybeer 

Well i cant find a way to up the pics in the reply. So here is a diagram thing and how to:

just unsrew the backplate. No need to get the pcb out of the box.

The board looks like this  ----------------------------------
                                     I                                         I
                                     I                                         I
                                     I    G     M       M        A        I
                                     I    N      I        O        M       I
                                     I    D     C        D        P        I
                                     I________________________I



Except for the griundlift each "selector" has a horizontal switch with 8!! legs and looks like this:

*1           *5


*2           *6
*3           *7
*4           *8

For Mod1 get a cable from *3 to *4 or at any spdt/dpdt switch  with *3 to the middle and *4 to the upper or lower pin on the switch

#------>NOTHING

#-----> Pin *3

#------>Pin *4   

or to a simple Linejack:

                  /  I              I
                /    I              I
              /      I              I 
           *3      I              I
    normally     I________I
     Ground           I
                          I
                         *4 (usuallay Signal/TIP on jacks)                 

For the Boost-Mod just use *7 and *8 from the Mod-Switching-Back instead of ITS *3 and *4. Everything else is the same. Maybe you might add a pulldown resistor against a short ceackle when switching from the NewBritish-Mod to the original one. Also you have the same sound for new british even if u are in Tweed or british. Sad that it doesnt work in Califrnian mode too, but maybe tweakable....
Hope that helped u...