A hunka hunka burning vintage overdrive tone right here.
The Power Boost was one of the major components of Gilmour's sound around DSOTM, with luscious, rich overdrive on just the right side of saturation overload.
This kit offers the choice of making the Power Boost, which likes 18V or the Overdriver, which runs at 9V. They both sound great, but the Power Boost has a lot more headroom to play with, so you get more oomph with less clipping.
Both versions can be built with either BC169C, BC184L or BC109 transistors, but opinion around here is the PB is best with 169 or 184, OD with 109. The board has been designed so you can use either without any leg twisting, despite their different pinouts. BC169C are available in very limited numbers. When they're gone, they're gone.
There's an optional on-board charge pump so you can get your 18V from your standard 9V supply. Result!
Designed for vertical-mount pots (which have round shafts - you'll need knobs with set-screw fitting), but you can wire in 'normal' pots if you prefer.
Yes, there are pads on there to take two different switches. The bottom SPDT is to select between 9 or 18V if you have the charge pump installed. To be honest the PB doesn't sound right at 9V, and the OD doesn't sound right at 18V, so its best to hardwire the circuit for one voltage. The DPDT at the top switches a few component connections. The idea was you could switch between PB or OD circuits, but it must have been a late night when the idea came about - there are component value changes between the two circuits as well as those two sets of connections. Leave it alone. Make one or the other.
Partial kit: PCB, all board-mounted components, pots.
Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED.
Enclosure (pre-drilled) is only available with full kits, and will not take a battery. Knobs are not included.
PCB size: 50 x 50mm
Knobs required: 4
Direct-Connect compatible (4-way)
Download the INSTRUCTION PDF
Here's the older version