Akashic Guitar effects circuit lookup
BOOST

Enclosure not stated · 1 knob

Tagboard Effects

Rangemaster with switchable input capsVerified

Based on the Dallas Arbiter Rangemaster· 36 other boards clone it

Category
Boost
Controls
Boost
Build
Vero· 11×10· 8 cuts, 2 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Booster
Open the layout at Tagboard Effects

From the post

Request. This is your standard Rangemaster, but with a 5K trimmer instead of the 3K9 to help bias the transistor, and 6 switchable input caps to go from treble boost to more of a full range boost. It would be easy to add a 3PDT toggle to switch between a germanium or silicon transistor, but I would expect them to bias differently and so don't know how good it will sound switching to silicon when the transistor is biasd for a germanium.

As always though, have a play with the circuit and see what you like, and remember if you want to use this daisy chained with negative ground effects, you could always use the Negative Voltage Converter.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 14 rows

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RefValueNormalizedTypeNotes
Resistors 3
×1470K470kread from the layout by eye
×11M1Mread from the layout by eye
×168K68kread from the layout by eye
Capacitors 7
×14n74.7nread from the layout by eye
×210n10none switched input cap, one output cap; read from the layout by eye
×122n22nread from the layout by eye
×147n47nread from the layout by eye
×168n68nread from the layout by eye
×1150n150nread from the layout by eye
×147u47uelectrolytic; read from the layout by eye
Transistors 1
×1??value not given; legend: Transistor is PNP germanium; read from the layout by eye
Potentiometers 1
BoostA10KA10kPotentiometerread from the layout by eye
Trimmers 1
×15K5kread from the layout by eye
Switches 1
Input caps2P6T rotary2P6T ROTARY2nd pole unused; read from the layout by eye

Other boards based on the Dallas Arbiter Rangemaster