Akashic Guitar effects circuit lookup
LEVEL

1590B · 1 knob

Mod Electronics

AmberPCB

Based on the Dan Armstrong Orange Squeezer· 13 other boards clone it

Category
Compressor
Controls
Level
Price
$4.95in stock
Tags
PCB only

From the vendor

The Amber and Orange Squeezer “squish” your guitar signal, which can provide smoother playing dynamics and enhanced sustain. The Orange Squeezer can be heard on classic songs by Steely Dan, The Doobie Brothers, and Dire Straits among others. An internal “bias” trimpot can have an effect on the degree of compression, but otherwise it is a very simple effect with only one control, output volume. To accommodate varying JFET specs, the Amber (and the Orange Squeezer) has an internal bias trimpot which must be set, which can be done by ear. Once the build is complete, connect your guitar to the pedal’s input and connect the pedal’s output to your amplifier. Locate the trimpot on the board. With the effect engaged, turn the trimpot fully clockwise and play your guitar. You should hear a normal signal. Now turn the trimpot fully counter-clockwise and play. You should hear a very faint signal or silence. In-between, the signal will be audible but quieter than the fully clockwise position. In this position, you should be hearing some signal compression. It can be a relatively subtle effect, but you should notice some differences in dynamics, attack/transients, and sustain. The effect may be more noticeable when playing note runs and rhythm parts. Set the trimpot to where you like the sound the best. Keep in mind that the bias setting will also have an effect on the maximum output level, so make sure you have enough output volume at the final bias setting.

Schematic

The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 28 rows

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RefValueNormalizedTypeNotes
Resistors 13
R1390k390kVishay PR01 or generic 1/4W resistor(R-PR01-390K)
R2390k390kVishay PR01 or generic 1/4W resistor(R-PR01-390K)
R31k51.5kVishay PR01 or generic 1/4W resistor(R-PR01-1D5K)
R4100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R5470k470kVishay PR01 or generic 1/4W resistor(R-PR01-470K)
R610k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R7220k220kVishay PR01 or generic 1/4W resistor(R-PR01-220K)
R82k42.4kVishay PR01 or generic 1/4W resistor(R-PR01-2D4K)
R9390k390kVishay PR01 or generic 1/4W resistor(R-PR01-390K)
R10470k470kVishay PR01 or generic 1/4W resistor(R-PR01-470K)
R1182k82kVishay PR01 or generic 1/4W resistor(R-PR01-82K)
R121M1MVishay PR01 or generic 1/4W resistor(R-PR01-1M)
R13470k470kVishay PR01 or generic 1/4W resistor(R-PR01-470K)
Capacitors 8
C14u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C24u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C34u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C4100u100uPolarized electrolytic capacitor, 6.3mm(C-ETR100-25)
C547n47nBox film capacitor, 7.2 x 2.5mm(C-R82-47N)
C647n47nBox film capacitor, 7.2 x 2.5mm(C-R82-47N)
C74u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C82n22.2nBox film capacitor, 7.2 x 2.5mm(C-R82-2N2)
Diodes 2
D11n34a1N34AGermanium diode, DO-7(P-Q972)
D21n58171N5817Schottky diode, DO-204AL(P-Q1N5817)
Transistors 2
Q12n54572N5457JFET, TO-92(P-Q2N5457)
Q22n54572N5457JFET, TO-92(P-Q2N5457)
ICs 1
U1RC4558RC4558Dual op-amp, DIP-8(P-QRC4558)
Potentiometers 1
RV2A10KA10k16mm right angle PCM Alpha potentiometerLevel control (R-VAM10KA-SS-PCL)
Trimmers 1
RV1B10k10kBourns 3362P trimpot(R-VT62P-10K)

Other boards based on the Dan Armstrong Orange Squeezer