Range Master with Voltage Inverter

The Dallas Range Master. Bedrock of so many classic tones. Beautiful germanium treble boost. The originals used OC44 transistors, but they're as rare as a coat on a night out in Newcastle, so we'll offer a selection of cans as and when we have them available. They'll all offer their own unique character to this little gem, so why not try a few to see which you prefer? Now also availalble with no transistor in case you've sourced your own little beauty.

Current options - PNP (positive ground supply):

• Russian MП16Б or MП41A

If you can source a NPN transistor with low enough leakage you can make yourself a negative-ground version, but here at FDHQ we're all out.

Because we care, and no-one likes messing around with dedicated posi-ground supplies, this new version has the option of a voltage inverter. This magical doohickey will let you use those beautiful PNP transistors while still working on a daisy-chainable standard negative ground supply. This is optional - you can still wire it posi-ground or use a battery if you prefer.

Board-mounted pot for minimal wiring and easy enclosure mounting.

Multimeter recommended for optimal biasing, but it can be done by ear.

If you want the PCB without parts there's a link for that at the bottom of the page.

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 available as an option with full kits, and can take a battery if desired with footswitch positioned 22mm higher, closer to the controls. Knob is not included.

Inspired by: Range Master

Difficulty: Easy

PCB size: 50 x 22mm

Knobs required: 1

Enclosure: 1590B

Direct-Connect compatible (4-way)

Check Specials for powder-coated enclosure availability.

Download the INSTRUCTION PDF