Akashic Guitar effects circuit lookup
LO-GAINHI-GAINLO-VOLUMEHI-VOLUMEBASSMIDDLETREBLEBRIGHTPREAMP/DRIVE

1590BB · 9 knobs

HotKits

Hairy Box Preamp/Overdrive

Based on the Friedman Small Box· 3 other boards clone it

Want a PCB? HotKits sells this PCB from a price list, ordered by message (or by email to alex.hotkits@gmail.com): message HotKits on Facebook.

Category
Preamp / Amp-in-a-box
Controls
Lo-Gain · Hi-Gain · Lo-Volume · Hi-Volume · Bass · Middle · Treble · Bright · Preamp/Drive
Price
$4.00in stock
See the HotKits price list Build document Sound samplesPrice list (Google Drive)Order: HotKits on FacebookHotKITs DIY community (Facebook group)

From the vendor

A two-channel guitar preamp/overdrive pedal that reproduces the sound of the preamp section of a Friedman Small Box tube amp. Separate gain and volume controls for each channel, common EQ. Can be used both as a preamp and as a stompbox to the guitar input of an amplifier (there is a preamp/drive mode switch). Power supply: regulated mains adapter 9 VDC. The dimensions of the PCB 86 x 44 mm. Enclosure type: Hammond 1590BB.

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 44 rows

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RefValueNormalizedTypeNotes
Resistors 18
×22k22.2kMetal film resistor 1/4W 2k2
×23k33.3kMetal film resistor 1/4W 3k3
×14k74.7kMetal film resistor 1/4W 4k7
×15k65.6kMetal film resistor 1/4W 5k6
×17k57.5kMetal film resistor 1/4W 7k5
×18k28.2kMetal film resistor 1/4W 8k2
×110k10kMetal film resistor 1/4W 10k
×310k10kResistor 1/4W 10k
×120k20kMetal film resistor 1/4W 20k
×122k22kMetal film resistor 1/4W 22k
×139k39kMetal film resistor 1/4W 39k
×143k43kMetal film resistor 1/4W 43k
×147k47kMetal film resistor 1/4W 47k
×1100k100kMetal film resistor 1/4W 100k
×2150k150kMetal film resistor 1/4W 150k
×1470k470kMetal film resistor 1/4W 470k
×11M1MMetal film resistor 1/4W 1M
×32M22.2MMetal film resistor 1/4W 2M2
Capacitors 12
×133p33pCeramic disk capacitor 33p 1kVCeramic disk capacitor
×1220p220pCeramic disk capacitor 220p 1kVCeramic disk capacitor
×14n74.7nPolyester film capacitor (R=5mm) 4n7 63VPolyester film capacitor
×310n10nPolyester film capacitor (R=5mm) 10n 63VPolyester film capacitor
×115n15nPolyester film capacitor (R=5mm) 15n 63VPolyester film capacitor
×133n33nPolyester film capacitor (R=5mm) 33n 63VPolyester film capacitor
×4100n100nPolyester film capacitor (R=5mm) 100n 63VPolyester film capacitor
×1220n220nPolyester film capacitor (R=5mm) 220n 63VPolyester film capacitor
×3470n470nPolyester film capacitor (R=5mm) 470n 63VPolyester film capacitor
×21u1uPolyester film capacitor (R=5mm) 1u 50VPolyester film capacitor
×147u47uElectrolytic capacitor 47µ 16VElectrolytic capacitor
×1100u100uElectrolytic capacitor 100µ 16VElectrolytic capacitor
Diodes 2
×11N40011N4001Diode 1N4001
×81N41481N4148Diode 1N4148
Transistors 1
×1BC547CBC547CTransistor BC547C
ICs 1
×2TL072CPTL072CPIC TL072CPDIP8
Potentiometers 4
×1B1kB1kPotentiometer RV16LN-15kQ B1k
×1B10kB10kPotentiometer RV16LN-15kQ B10k
×4A20kA20kPotentiometer RV16LN-15kQ A20k
×1A50kA50kPotentiometer RV16LN-15kQ A50k
Trimmers 1
×15k5kTrimmer potentiometer type 3362 5k
Switches 2
×1Toggle switch SMTS-103 On-Off-OnTOGGLE SWITCH SMTS-103 ON-OFF-ONToggle switch SMTS-103 On-Off-On
×1Toggle switch SMTS-102 On-OnTOGGLE SWITCH SMTS-102 ON-ONToggle switch SMTS-102 On-On
LEDs 3
×2Red LED 5mmRED LED 5MMRed LED 5mm
×3Red LED 3mmRED LED 3MMRed LED 3mm
×1Orange LED 5mmORANGE LED 5MMOrange LED 5mm

Other boards based on the Friedman Small Box