As I was playing around with the Colorsound booster made by Steve Williams of Pig Dog fame, I noticed some similarity to the Guild Treble Booster, AKA the Brian May Box.
I made a slightly simplified version, without the buffer based on one of the Fryer Boosters. I kind of free-styled the build, working without a layout using a spare piece of vero.
This is going into a 1590B, which is normally too small for anything that I make. This will just have a switch and no volume control.
I'll update a bit later with vero details and wiring. I used a vintage glob top NPN silicon transistor pulled from an old PA head preamp.

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