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VOLUMEGAINTONECONTOUR

Enclosure not stated · 4 knobs

Revolution Deux

Wampler Pinnacle II

Based on the Wampler Pinnacle· 7 other boards clone it

Category
Distortion
Controls
Volume · Gain · Tone · Contour
Price
see vendor
Tags
freestompboxes.org trace
Read the post at Revolution Deux Schematic imagefreestompboxes.org thread

From the vendor

A schematic said to be the Pinnacle II: the same pair of bootstrapped JFET micro-amp stages with a DPDT boost switch adding source resistors, a JFET buffer and tone/contour network, but with a JFET output stage in place of the op amp.

Schematic

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

Parts list 55 rows

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Check before you build · 3 values the reader of this schematic was not sure of
  • The post says this is 'supposedly' the Pinnacle II.
  • JFET types are not given on the drawing.
  • The LED resistor's value is not written.
RefValueNormalizedTypeNotes
Resistors 24
R1??LED resistor; value not written; read from the schematic by eye
R21M1Minput pull-down; read from the schematic by eye
R3470470input; read from the schematic by eye
R41M1Mread from the schematic by eye
R51M1Mread from the schematic by eye
R61K1kboost source leg; read from the schematic by eye
R710K10ksource; read from the schematic by eye
R8470K470kread from the schematic by eye
R91M1Mread from the schematic by eye
R101M1Mread from the schematic by eye
R111K1kboost source leg; read from the schematic by eye
R1210K10ksource; read from the schematic by eye
R1382K82kread from the schematic by eye
R1415K15kbuffer drain; read from the schematic by eye
R151K1kbuffer source; read from the schematic by eye
R1682K82ktone; read from the schematic by eye
R1747K47ktone; read from the schematic by eye
R1810K10kread from the schematic by eye
R1910K10kread from the schematic by eye
R20220K220kread from the schematic by eye
R21470K470kread from the schematic by eye
R2215K15koutput stage drain; read from the schematic by eye
R231K1koutput stage source; read from the schematic by eye
R2422K22koutput; read from the schematic by eye
Capacitors 17
C1220p220pinput; read from the schematic by eye
C256n56nbootstrap; read from the schematic by eye
C31u1uread from the schematic by eye
C422n22nread from the schematic by eye
C5470p470pacross R8; read from the schematic by eye
C6150p150pread from the schematic by eye
C7100n100nbootstrap; read from the schematic by eye
C822n22nread from the schematic by eye
C91u1uread from the schematic by eye
C1010n10ntone; read from the schematic by eye
C1510n10ntone; read from the schematic by eye
C12100u100uelectrolytic, supply filter; read from the schematic by eye
C136.8n6.8nswitched by Vint/Mod; read from the schematic by eye
C164.7n4.7nread from the schematic by eye
C1433n33ncontour; read from the schematic by eye
C114.7n4.7nread from the schematic by eye
C171u1uoutput; read from the schematic by eye
Diodes 1
D11N40011N4001polarity protection; read from the schematic by eye
Transistors 6
Q1??JFET; read from the schematic by eye
Q2??JFET, bootstrapped load; read from the schematic by eye
Q3??JFET; read from the schematic by eye
Q4??JFET, bootstrapped load; read from the schematic by eye
Q5??JFET buffer; read from the schematic by eye
Q6??JFET output stage; read from the schematic by eye
Potentiometers 4
VolumeA100KA100kPotentiometerread from the schematic by eye
Gain500K500kPotentiometerread from the schematic by eye
ToneB100KB100kPotentiometer100k linear; read from the schematic by eye
ContourC50KC50kPotentiometer50k reverse log; read from the schematic by eye
Switches 2
Vint/ModSPDTSPDTread from the schematic by eye
BoostDPDTDPDTread from the schematic by eye
LEDs 1
LED1LEDLEDread from the schematic by eye

Other boards based on the Wampler Pinnacle