Super Hard On

Rated as one of the best guitar boosters, this classic and simple DIY project is the Super Hard On. The gain is a negative-feedback control styled after classic 60's recording console inputs.
Steps
  1. Overview
  2. Designators and components
  3. PCB assembly
  4. Enclosure and wiring
  5. General description of components
  6. Drilling template
Categories
Tayda Electronics Kits, DIY Projects, DIY Guitar Effects
Created by DHEA
Status: Active
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Designators and components Step 2 of 6

COMPONENT LIST 

PCB
PCB               SUPER HARD ON PCB

Resistors        
R1    1M        1M OHM 1/4W 1% METAL FILM RESISTOR (Optional)
R2    10M      10M OHM 1/4W 1% METAL FILM RESISTOR
R3    10M      10M OHM 1/4W 1% METAL FILM RESISTOR
R4    5.1k      5.1K OHM 1/4W 1% METAL FILM RESISTOR
R5    100k     100K OHM 1/4W 1% METAL FILM RESISTOR
R6    2.2k      2.2K OHM 1/4W 1% METAL FILM RESISTOR (Optional)

Capacitors        
C1    100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2    10u       10UF 50V ELECTROLYTIC CAPACITOR 5X11MM

Diodes        
D1    1N4148      1N4148 SWITCHING SIGNAL DIODE
D2    1N4148      1N4148 SWITCHING SIGNAL DIODE
Led   LED            LED 3MM GREEN  (Optional)

Transistors
Q1    BS170        BS170 BS170RLRAG MOSFET N-CHANNEL

Potentiometers
GAIN    5k-C       5K OHM ANTI-LOG TAPER POTENTIOMETER

 

PCB

     

 

PCB SCHEMATIC

 

TRANSISTORS

The 2N7000 is a common replacement for BS170, however the pinout is a 180 degrees turn. Mount the transistors on the PCB as follows.

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