Akashic Guitar effects circuit lookup
DEPTHSPEEDON/OFF

Enclosure not stated · 3 knobs

Revolution Deux

Jordan Vico Vibe

Based on the Jordan Vico Vibe· 4 other boards clone it

Category
Tremolo
Controls
Depth · Speed · On/Off
Price
see vendor
Also as
Vero layout · from Revolution Deux
Tags
freestompboxes.org trace

From the vendor

The Jordan Vico Vibe, a late-1960s plug-in tremolo housed in the same style of box as the Jordan Bosstone; despite its name it is a tremolo, not a vibe. A 2N5088 phase-shift oscillator drives a second 2N5088 that shunts the signal to ground as a variable resistor, giving a smooth sine-wave tremolo, and also the volume drop the original is known for. Mahoney later made a replica with an added boost.

The 1M trimmer sets the bias of the first (shunt) transistor. Renegadarian's vero layout adds optional parts: R9 1M, C5 100u and D2 1N4001 for polarity protection.

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

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Check before you build · 1 value the reader of this schematic was not sure of
  • The sketch does not name the two 100kA pots; the one feeding the oscillator into the shunt transistor is listed as Depth and the rheostat in the oscillator is listed as Speed.
RefValueNormalizedTypeNotes
Resistors 8
R1560K560kread from the schematic by eye
R2560K560kread from the schematic by eye
R3220K220kread from the schematic by eye
R41M1Mread from the schematic by eye
R53.3K3.3kread from the schematic by eye
R639K39kread from the schematic by eye
R727K27kinput; read from the schematic by eye
R827K27koutput; read from the schematic by eye
Capacitors 4
C1100n100nread from the schematic by eye
C2100n100nread from the schematic by eye
C3100n100nread from the schematic by eye
C4100n100nread from the schematic by eye
Diodes 1
D16.8V6V8zener; read from the schematic by eye
Transistors 2
Q12N50882N5088shunt transistor; read from the schematic by eye
Q22N50882N5088oscillator; read from the schematic by eye
Potentiometers 3
VR11M1MPotentiometertrimmer, bias of the shunt transistor; read from the schematic by eye
DepthA100KA100kPotentiometerread from the schematic by eye
SpeedA100KA100kPotentiometerread from the schematic by eye
Switches 1
On/OffSPDTSPDToscillator on/off; read from the schematic by eye

Other boards based on the Jordan Vico Vibe