Here's a mod for every Brit PCB (plexi, Sl+, Ultra etc.).
What i've done is put 2 switch (spdt On/On) to add a gain boost and a "channel switching" between hotrodded plexi mode and hotrodded jcm800 mode.
I tried to make it as simple as possible without cutting/rerouting traces on the pcb so it could be done by everyone who is cabaple to desolder/solder component without damaging the PCB itself;
if you're not happy or don't like how the mod sound you could roll it back to stock.
I thake no responsibility if you damage the pcb/module in the process, so do it only if you are comfortable with a soldering iron.
First a brief explanation of the mod:
I thake the signal after C3 and reroute to different parts of the board, so we can choose between 3 or 4 gain stage (hotrodded plexi/hotrodded jcm800).
The gain boost is an added resistor that trow part of the signal before the Gain knob to ground.
Here you can take a zip file containg the schematics, a layout of the PCB with the wiring of the 2 switches and a component list.
Where you read "No Parts" it means that if you have a cap, resistor or a bridge in that place you have to remove it.
My pcb Layout is the old Brit Board revision, it was a black stripe plexi module,
if you have the new revision just look at the layout then thake a look at your pcb, it may be a different name but it'll sit in the same spot. (Ex: R31 on old revision = r25 on new revision)
I'm sorry but since i don't have a new revision board i cannot provide a different layout/schematic/part lists for the new pcb revision, but if someone could give me a good picture of the board then...
In the schematic and component list some part of the module circuit are omitted, only the "real" preamp section is described.
The brit module is very nice to work with, this is the simplest way i finded to have switchable gain stages without messing around with added component to the board or cutting/rerouting existing trace.
I'd put some clip also, but i don't have a mic for recording...i'll see if i manage to borrow one.
If you're interested in it i could upload the schematics and board layout of the "general" Brit Module in diptrace format.
What i've done is put 2 switch (spdt On/On) to add a gain boost and a "channel switching" between hotrodded plexi mode and hotrodded jcm800 mode.
I tried to make it as simple as possible without cutting/rerouting traces on the pcb so it could be done by everyone who is cabaple to desolder/solder component without damaging the PCB itself;
if you're not happy or don't like how the mod sound you could roll it back to stock.
I thake no responsibility if you damage the pcb/module in the process, so do it only if you are comfortable with a soldering iron.
First a brief explanation of the mod:
I thake the signal after C3 and reroute to different parts of the board, so we can choose between 3 or 4 gain stage (hotrodded plexi/hotrodded jcm800).
The gain boost is an added resistor that trow part of the signal before the Gain knob to ground.
Here you can take a zip file containg the schematics, a layout of the PCB with the wiring of the 2 switches and a component list.
Where you read "No Parts" it means that if you have a cap, resistor or a bridge in that place you have to remove it.
My pcb Layout is the old Brit Board revision, it was a black stripe plexi module,
if you have the new revision just look at the layout then thake a look at your pcb, it may be a different name but it'll sit in the same spot. (Ex: R31 on old revision = r25 on new revision)
I'm sorry but since i don't have a new revision board i cannot provide a different layout/schematic/part lists for the new pcb revision, but if someone could give me a good picture of the board then...
In the schematic and component list some part of the module circuit are omitted, only the "real" preamp section is described.
The brit module is very nice to work with, this is the simplest way i finded to have switchable gain stages without messing around with added component to the board or cutting/rerouting existing trace.
I'd put some clip also, but i don't have a mic for recording...i'll see if i manage to borrow one.
If you're interested in it i could upload the schematics and board layout of the "general" Brit Module in diptrace format.