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MEGALITH DUAL DRIVE

4

PARTS LIST, CONT.

PART VALUE

TYPE 

NOTES

C7

470n

Film capacitor, 7.2 x 3.5mm

Original uses 820n for C7. If you can find one, omit C8 and C9. See build 
notes for more info.

C8

330n

Film capacitor, 7.2 x 3mm

C9

22n

Film capacitor, 7.2 x 2.5mm

C10

22n

Film capacitor, 7.2 x 2.5mm

C11

100n

Film capacitor, 7.2 x 2.5mm

C12

2n2

Film capacitor, 7.2 x 2.5mm

2n in original. See build notes.

C13

2n2

Film capacitor, 7.2 x 2.5mm

2n in original. See build notes.

C14

100n

Film capacitor, 7.2 x 2.5mm

C15

1uF

Film capacitor, 7.2 x 3.5mm

C16

10uF

Electrolytic capacitor, 5mm

C17

100uF

Electrolytic capacitor, 6.3mm

C18

100n

MLCC capacitor, X7R

D1

1N5817

Schottky diode, DO-41

D2

1N5239B

Zener diode, 9.1V, DO-35

D3

1N5239B

Zener diode, 9.1V, DO-35

Q1

BS170

MOSFET, N-channel, TO-92

Can substitute 2N7000 (rotate 180 degrees)

Q2

BS170

MOSFET, N-channel, TO-92

Can substitute 2N7000 (rotate 180 degrees)

Q3

BS170

MOSFET, N-channel, TO-92

Can substitute 2N7000 (rotate 180 degrees)

Q4

BS170

MOSFET, N-channel, TO-92

Can substitute 2N7000 (rotate 180 degrees)

ORDER 4PDT slide

Slide switch, 4PDT

E-Switch EG4208

TONE

100kB

16mm right-angle PCB mount pot

GAIN

5kC

16mm right-angle PCB mount pot

D. LVL

100kB

16mm right-angle PCB mount pot

B. LVL

5kC

16mm right-angle PCB mount pot

HIGAIN SPDT cntr off

Toggle switch, SPDT on-off-on

SUB

SPDT cntr off

Toggle switch, SPDT on-off-on

D.LED

5mm

LED, 5mm, red diffused

B.LED

5mm

LED, 5mm, red diffused

IN

1/4" mono

1/4" phone jack, closed frame

Switchcraft 111X or equivalent.

OUT

1/4" mono

1/4" phone jack, closed frame

Switchcraft 111X or equivalent.

DC

2.1mm

DC jack, 2.1mm panel mount

Mouser 163-4302-E or equivalent.

D.FSW

3PDT

Stomp switch, 3PDT

B.FSW

3PDT

Stomp switch, 3PDT

ENC

125B

Enclosure, die-cast aluminum

Can also use a Hammond 1590N1.

Summary of Contents for MEGALITH

Page 1: ...Box of Rock Distortron A two channel drive composed of cascaded MOSFET boost stages The drive channel and boost channel can be combined or selected independently Amp like overdrive distortion 1 0 0 20...

Page 2: ...be added as seen in Zvex s original demo video The boost comes after the drive when both are engaged This is a reasonable way of using it but it won t work with every rig Because of this the Megalith...

Page 3: ...2 330R Metal film resistor 1 4W R13 390R Metal film resistor 1 4W R14 47k Metal film resistor 1 4W R15 82k Metal film resistor 1 4W R16 9k1 Metal film resistor 1 4W 10k in original See build notes R17...

Page 4: ...ubstitute 2N7000 rotate 180 degrees Q2 BS170 MOSFET N channel TO 92 Can substitute 2N7000 rotate 180 degrees Q3 BS170 MOSFET N channel TO 92 Can substitute 2N7000 rotate 180 degrees Q4 BS170 MOSFET N...

Page 5: ...h add up to 810n 2 pole filter values Between the tone control and drive level there is 2 pole filter formed by R16 C12 and R17 C13 In the original Box of Rock the two resistors are 10k and the two ca...

Page 6: ...Q3 R11 R13 C5 R14 C10 C11 R15 R16 C12 R17 C13 HI GAIN 2 3 1 C7 C6 SUB 2 3 1 R12 C8 C9 GND 1M 5kC 1M 1M BS170 1N5239 GND 5k1 100n VA GND 1uF 47k GND 10uF B BOOST IN OOST OUT R18 BOOST LEVEL 1 2 3 R19 R...

Page 7: ...If you d rather use open frame jacks please refer to the Open Frame Jack Drill Template for the top side LED hole drill size assumes the use of a 5mm LED bezel available from several parts suppliers A...

Page 8: ...MEGALITH DUAL DRIVE 8 ENCLOSURE LAYOUT Enclosure is shown without jacks See next page for jack layout and wiring 125B...

Page 9: ...MEGALITH DUAL DRIVE 9 WIRING DIAGRAM 125B D IN V GND D OUT B IN B OUT DRV IN GND V V JACK GND JACK OUT IN DRV BOOST BOOST OUT OUT IN...

Page 10: ...s suggestions based on the experience and opinions of others Projects may be used for commercial endeavors in any quantity unless specifically noted No attribution is necessary though a link back is a...

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