Enclosure not stated · 1 knob

Pete Moore Rangepig

Category: Boost
Controls: Blend trim
Price: see vendor

Read the post at Revolution Deux Schematic image

From the vendor

Pete Moore's hybrid Rangemaster: a low-gain germanium OC44 in Darlington with a silicon 2N4402, with a 100k trimmer between them that dials in how much germanium grit the circuit has. The author prefers it to the silicon Rangepig for its tweakability.

MartyMart built it with an OC44 and a 2N3906 and used 47n input and output caps for a more full-range 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 10 rows

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Check before you build · 1 value the reader of this schematic was not sure of

The input capacitor's value is not given (drawn only as 'C').

Ref	Value	Normalized	Type	Notes
Resistors 4
R1	470K	470k		read from the schematic by eye
R2	68K	68k		read from the schematic by eye
R3	10K	10k		collector; read from the schematic by eye
R4	3.9K	3.9k		emitter; read from the schematic by eye
Capacitors 3
C1	?	?		input; value not given; read from the schematic by eye
C2	10n	10n		output (.01uF); read from the schematic by eye
C3	22u	22u		electrolytic; read from the schematic by eye
Transistors 2
Q1	OC44	OC44		germanium PNP, low gain; read from the schematic by eye
Q2	2N4402	2N4402		silicon PNP; read from the schematic by eye
Potentiometers 1
Blend trim	100K	100k	Potentiometer	trimmer between Q1 and Q2; read from the schematic by eye