Akashic Guitar effects PCB lookup
BOOSTRESONANCE

125B · 2 knobs

Aion FX

PhotonBooster / Line Driver

Based on the SD Pickup Booster

Category
Boost· Booster & Pickup Enhancer
Controls
Boost · Resonance
Difficulty
Easy
Price
$12.50in stock
Buy the PCB at Aion FX Build document1.0.0 (2019-10-18) Mouser parts list google

From the vendor

A Class-A amplifier capable of up to 25dB of clean gain, this pedal also has a unique Resonance feature that enables a single-coil pickup to sound like a vintage or modern humbucker.

The Photon Booster / Line Driver is an adaptation of the Seymour Duncan Pickup Booster (version 2, 2015, traced by Aion FX in 2019).

The V2 update of the Pickup Booster added a true class-A output stage. The first version was traced in 2007, but the new version had not yet been dissected by the DIY community.

The Pickup Booster is designed to provide 25dB of crystal-clean Class A boost. It also has a resonant peak switch that makes a single-coil pickup sound more like a vintage or high-output humbucker depending on the setting.

Because of the direct interaction with the pickups, it’s recommended to use the pedal as the first effect in the signal chain, otherwise the Resonance switch will not work as advertised and will just act as a slight treble cut.

The Photon is a direct clone of the Pickup Booster with no modifications other than some additional power supply filtering.

Schematic

The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 44 rows

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RefValueNormalizedTypeNotes
Resistors 17
R14M74.7MMetal film resistor, 1/4WAnti-pop resistor for Resonance switch.
R24M74.7MMetal film resistor, 1/4WAnti-pop resistor for Resonance switch.
R31k1kMetal film resistor, 1/4W
R4475k475kMetal film resistor, 1/4WCan substitute 470k.
R530k130.1kMetal film resistor, 1/4WCan substitute 30k.
R6549R549Metal film resistor, 1/4WCan substitute 560R.
R7100R100Metal film resistor, 1/4W
R8100k100kMetal film resistor, 1/4W
R930k130.1kMetal film resistor, 1/4WCan substitute 30k.
R10294R294Metal film resistor, 1/4WCan substitute 300R.
R113k833.83kMetal film resistor, 1/4WCan substitute 3.9k.
R1249.9R49.9Metal film resistor, 1/4WCan substitute 51R.
R1349.9R49.9Metal film resistor, 1/4WCan substitute 51R.
R14182k182kMetal film resistor, 1/4WCan substitute 180k.
R15162k162kMetal film resistor, 1/4WCan substitute 160k.
RPD1M1MMetal film resistor, 1/4WInput pulldown resistor.
LEDR4k74.7kMetal film resistor, 1/4WLED current-limiting resistor. Adjust value to change LED brightness.
Capacitors 11
C13n33.3nFilm capacitor, 7.2 x 2.5mm
C2820pF820pMLCC capacitor, NP0/C0G
C347n47nFilm capacitor, 7.2 x 2.5mm
C4120pF120pMLCC capacitor, NP0/C0G
C547pF47pMLCC capacitor, NP0/C0G
C610uF10uElectrolytic capacitor, 5mm
C71uF1uFilm capacitor, 7.2 x 3.5mm
C8120pF120pMLCC capacitor, NP0/C0G
C9100uF100uElectrolytic capacitor, 6.3mmPower supply filter capacitor.
C1047uF47uElectrolytic capacitor, 5mmVoltage reference filter capacitor.
C11100n100nMLCC capacitor, X7RPower supply filter capacitor.
Diodes 3
D11N58171N5817Schottky diode, DO-41
D21N9141N914Fast-switching diode, DO-35
D31N9141N914Fast-switching diode, DO-35
Transistors 5
Q12N50892N5089BJT transistor, NPN, TO-92
Q22N50892N5089BJT transistor, NPN, TO-92
Q32N50872N5087BJT transistor, PNP, TO-92
Q42N39042N3904BJT transistor, NPN, TO-92
Q52N39062N3906BJT transistor, PNP, TO-92
Switches 2
RES.SPDT cntr offSPDT CNTR OFFToggle switch, SPDT on-off-on
FSW3PDT3PDTStomp switch, 3PDT
LEDs 1
LED5mm5MMLED, 5mm, red diffused
Jacks & sockets 3
IN1/4" stereo1/4" STEREO1/4" phone jack, closed frameSwitchcraft 112BX or equivalent.
OUT1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
DC2.1mm2.1MMDC jack, 2.1mm panel mountMouser 163-4302-E or equivalent.
Hardware 2
BATTBattery snapBATTERY SNAP9V battery snapOptional. Use the soft plastic type—the hard-shell type will not fit.
ENC125B125BEnclosure, die-cast aluminumCan also use a Hammond 1590N1.