vBST - variable gain signal amplifier/boost module (2HP)
A nice, simple boost/amplification module - use it to give your signals a bit of extra presence. This is the spiritual successor to the original BST module - so many people asked about swapping out the gain resistor on the original that I decided to go ahead and redesign the board with a trimpot instead of a fixed resistor.
What does this mean? It means that you can alter the maximum gain using a screwdriver instead of faffing about soldering and desoldering resistors to get your desired result. There are two gain stages - the first is variable, utilising a 50k fader and 50k trimmer, whilst the second gain stage is fixed at 8x and can be altered by changing a resistor - this gives you a maximum theoretical gain of 40x.
There are a number of uses: bring a line level signal up to something approaching 'modular' levels - you could also use it as a sort-of cork-brained DI if you want to run a guitar or bass straight into a mixer. It offers a bit more versatility than the 'fixed' BST module.
In addition, the amplification is now taken care of by a TL0x2 op-amp, since it provides better noise immunity than the NE5532 used in the old BST module.
The gain is controlled by a 20mm illuminated Alpha fader.
Panels are fabricated from grey FR4 (PCB material) and have gold ENIG lettering. Mounting hardware (M3x6 machine screws) and a power cable are also supplied.