Bugera 6262 mod.

[Danglin' Fury]

Hey. I need an opinion (Enzo's preferably) on a mod I'm about to do on my 6262. The tone on that amp is amazing! The only thing I don't like is the fact I can't switch from clean to crunch w/ the footswitch. What I want to do is disconnect inside the amp the portion that turns the effects loop on/off and jumper it to "on" all the time, find the momentary switch traces that turn on/off the crunch portion of said clean channel, and resolder the footswitch leads to those traces. Thus giving me a footswitchable crunch channel. I'm an electronics tech so this shouldn't be too big a deal. Does anybody think this will work? Let a brotha know. Thanks for looking.

[Twist]

Sounds like you've already got it figured out. It's sounds odd though to make an amp with no footswitch option for changing channels.

[Enzo]

You realize, I hope, that mainly what I am here is a "fix it" guy rather than a "mod it" guy.

The switching circuits are part of the FX module, and we don;t even have drawings for that little board. But the amp is simple. there are three momentary switches on the front panel, they ground some control input to the switching. The footswitch? I have no idea what is in it, but a simple ohm meter test will tell you which pin on the FS jack carries the loop control line. Open that line and run a wire from that pin on the jack to the non-ground side of the panel switch for Crunch, and voila.

As far as I know, the loop defaults to on anyway, so I don;t know that we'd have to change anything to have it stay on. Doesn;t it stay on all by itself?

[Danglin' Fury]

Actually, you are right. It does default to "on" all the time. My "real job" has me working 7 days a week right now on a return-to-grid project so I haven't had much time to do the mod. Very soon though. I'll report back if it works. I may find/make a separate footswitch. A single button possibly momentary and wire it with that. That way, I wouldn't have to mess with the existing footswitch. I'd just have an extra.

[Alfayate]

Hi there

I bought in second hand a bugera 6260 120 watts head and i have now the same issue. I really don't use the lead channel cause it's to noise and do not give me that powerfull body as the crunch mode. I know its been 5 years that you wrote this, but then.. did you came up with a way to footswitch to crunch mode?

Thank you! Cheers

[mozwell]

I found these in my travels, they may help
Bugera 333XL, 6262, V55

[johnlovesbeer]

To Enzo!
What do you mean by "open that line"?
Cheers!

[Enzo]

He wanted to repurpose some panel button, so I suggested he open the line between that button and the circuit it now controls. Somewhere on the board is a copper trace from the button switch back to some circuit. Cut that trace, now you can wire the button itself to whatever you want.

[johnlovesbeer]

Thanks Enzo. I thought that's what you meant.
I want to do exactly the same mod but I cant's work out which is the non-ground side of the momentary panel switch. It has 6 pins and I have a wiring schematic but I'm at a loss as to which pin I should be connecting the wire to.
Any suggestions?
BTW, I've got the pedal input jack terminal sorted!
Cheers!

[Primed73]

There are two types of pedals for this amp as you know, depending on amp revision.

1. Clean - Lead - Reverb - FX-Loop
2. Clean - Crunch - Lead - FX-Loop

As far as I can gather, the pedal and the BDM1 digital module in the amp are identical, the only difference I can see is the ATMEGA8 microcontrolller in the amp is programmed differently.
Please correct me if I'm wrong, but the pedal switching is governed by a resistor ladder leading to pins X5 and X4 inside the footpedal.

Pedal 1:
CLEAN: switch between 100 ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (0.0 volts)
LEAD: switch between 1K Ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (0.45 volts)
REVERB: switch between 3.3K Ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (1.2 volts)
FX-LOOP: switch between 6.8K Ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (1.9 volts)

Pedal 2:
CLEAN: switch between 100 ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (0.0 volts)
CRUNCH: switch between 1K Ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (0.45 volts)
LEAD: switch between 3.3K Ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (1.2 volts)
FX-LOOP: switch between 6.8K Ohms between X5 GND and X4 voltage sense (by voltage divider to ADC) (1.9 volts)

Unless someone knows of a resistor value or other modification that reacts with pedal one that turns on the crunch, I can only guess modification inside the amp is the only way, I could be wrong, but just my penny's worth.
I'll post an idea I had for this later on.

[PorterW]

Hey, way later on this.

I have an EHX super switcher. I want to use one or two control buttons on it to control the clean/lead switch on my 6262. To do that I need to jimmy either one 1/4” connection between the amp and super switcher that would switch the channel by on/off button or 2 1/4” connections that would each turn on the individual channel by on/off button. I have no idea how to do this or if it’s possible. The following is what I’ve done wrong so far. Btw, I have the clean/lead/reverb/fx version of the pedal.

I opened up the switch box and found 5 wires—white, black, green, red, and yellow—vaguely leading to the four buttons. I found labeling that led me to believe the green wire was a ground, white the fx loop, black reverb, yellow lead, and red clean. I opened up the pedal chord and found the 5 wires. I cut a 1/4” patch cable in half to use for my two inputs.

attempt 1:
I cut the red, yellow, and green wires. I spliced the center of each 1/4” to the green wire and re-connected it. I spliced the amp end of the yellow wire to one 1/4” ring and the amp end of the green wire to the ring of the other 1/4”. I plugged everything in.

result 1:
the super switcher buttons had no effect on the amp. The lead channel and reverb button LEDs did not function, but the buttons did.

attempt 2:
I swapped the center/ring connections so now the ground went to the ring and the yellow and red wires connected to the center of their respective 1/4” inputs.

result 2:
the super switcher buttons caused audible noise when clicked and brought in and out static if turned on in the right combination. Foot switch buttons still worked, and still no LEDs. Lead channel was extra noisy.

attempt 3:
I kept everything as is, but re-connected the yellow and green wires back to their pedal ends in addition to their respective 1/4” inputs.

result 3:
my super switcher can now control whether the LEDs on my pedal light up or not, but still will not control whether the amp is switching.

conclucions thus far:
I’m guessing the red, yellow, and green wires operate the red, yellow, and green lights on the pedal, and the black and white wires operate the switching. Reading this thread, I think I’m realizing it must not be the wire source that the buttons send a signal through, but the buttons send different voltage signals—I’m guessing down the white wire—that the amp the reads and reacts to somehow.

If you want to be sneaky about whether you are on your lead/clean channel or whether you are using reverb, this mod is for you. That was not my goal though. Can anyone help?