Boost | R2R Electric

Boost Pedals

Two Knob Treble Booster

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Each 2 Knob Treble Booster features:

Dallas Rangemaster circuit modified with a 6 position tone switch

AC107 or OC44 (when available) germanium transistors

Vintage CTS, Centralab, Piher or Stackpole potentiometer

Philips or Sprague electrolytic capacitors

6 position rotary input capacitor switch with paper in oil or mylar audio grade capacitors

1960's Sprague Black Beauty or Bumblebee (when available) output capacitors

Allen-Bradley 1/2w, 1w & 2w carbon comp resistors

True Bypass switch

Handwired on phenolic terminal strip

Daka-Ware control knobs

Hammond 125b enclosure in hammered finish

Treble Booster Professional

The Treble Booster Professional features my favorite modifications to the Rangemaster circuit. These include larger output cap value for wider frequency range & increased potentiometer value matched with higher gain transistor for "hotter" voicing.

Each Treble Booster Pro features:

Modified Dallas Rangemaster circuit modified with a 6 position tone switch

Mullard OC45 germanium transistor or Mullard OC202 silicon transistor

Vintage CTS, Centralab, Piher or Stackpole potentiometer

Philips or Sprague electrolytic capacitors

6 position rotary input capacitor switch with paper in oil or mylar audio grade capacitors

NOS West-Cap, Astron or other PIO output capacitor

Piher & Allen-Bradley 1/2w, 1w & 2w carbon comp resistors

True Bypass switch

LED on/off indicator

Handwired on phenolic terminal strip

Daka-Ware control knobs

Hammond 125b enclosure in hammered finish

Pre-Amp

This germanium Pre-Amp boost is a reproduction of a rare 1950's Hofner Preamp unit. It was designed to be used in the auxiliary input of the typical 1950's home's stereo hifi console or tape recorder (all which would be vacuum tube based) and allow a guitar to be plugged in and amplified. Effectively making your home radio into a guitar amplifier. The only modifications to the circuit are a volume control and to remove the shock protection capacitor. That capacitor was in place to eliminate the possibility of being shocked by a "hot chassis" radio. In pedal form it is not needed, so we bypassed that section. the Volume control allows you to dial in the amount of boost this circuit provides.

As a pedal this circuit is a fantastic clean or dirty boost. Into a clean amp and lower volumes, it is a germanium loud button! It just takes your signal and makes it quite a bit louder and sweeter. Into a dirty amp, it pushes the signal into further overdrive. With the volume control ay max into a dirty amp, it sounds like a vintage tweed amp on the verge of imploding into itself.

Each Pre-Amp features

Point-to-point thru-hole construction

Vintage 1960's Philips AC107 transistor

Vintage CTS, Stackpole, Clarostat potentiometer

NOS Philips electrolytic capacitors

1960's Wima TFF capacitor

NOS Allen-Bradley carbon comp resistors

Housed in a hammertone gray 125b enclosure with Fairchild reproduction knob and dial plate