Akashic Guitar effects circuit lookup
BIAS TRIMDRIVE

Enclosure not stated · 2 knobs

Revolution Deux

Will Firstbrook Range Pig Treble Boost

Based on the Will Firstbrook Range Pig

Category
Boost
Controls
Bias trim · Drive
Price
see vendor
Read the post at Revolution Deux Schematic image

From the vendor

Will Firstbrook's low-noise, negative-ground silicon treble booster that emulates a Rangemaster with piggybacked 2N5210 transistors to mimic germanium's low gain and nonlinearity. Q2's collector is biased to 7V for asymmetric clipping, and C6/C7 cut highs to simulate germanium's high-frequency weakness.

C1 can be increased to 100n for a full-bodied boost.

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 19 rows

Report a wrong parse

Got parts in a drawer? See what you can build with them.

RefValueNormalizedTypeNotes
Resistors 6
R110K10kread from the schematic by eye
R2150K150kread from the schematic by eye
R35K5kread from the schematic by eye
R52.2M2.2Mread from the schematic by eye
R71M1Mread from the schematic by eye
R85K5kread from the schematic by eye
Capacitors 8
C16.8n6.8n.0068uF; read from the schematic by eye
C222u22uelectrolytic; read from the schematic by eye
C3100n100nread from the schematic by eye
C447u47uelectrolytic; read from the schematic by eye
C547u47uelectrolytic, supply filter; read from the schematic by eye
C6120p120pread from the schematic by eye
C722n22nswitched by S2; read from the schematic by eye
C910n10nread from the schematic by eye
Transistors 2
Q12N52102N5210read from the schematic by eye
Q22N52102N5210read from the schematic by eye
Potentiometers 2
Bias trim1M1MPotentiometerR6; set for 7V on Q2's collector; read from the schematic by eye
Drive5K5kPotentiometerR4; read from the schematic by eye
Switches 1
S2SPSTSPSTswitches C7 in; read from the schematic by eye