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Copyright © 2019 by modkitsdiy.com

Use these instructions to learn:

How to build an effects pedal for overdrive.

The Thunderdrive Deluxe LTD is an overdrive pedal kit that will provide a strong clean signal boost in the 
early gain settings and smooth distortion at maximum gain settings. Adjusting output and distortion controls 
provides a wide variety of tones in spite of its simple construction. It is capable of overdriving the preamp 
section of your guitar amp or adding its own layer of distortion at lower volume. This version is equipped 
with a three position diode selector switch.

The switch offers three different settings and tones. The top position is the classic silicon clipping diodes 
used in the original Thunderdrive. The middle position gives you the lifted diode “turbo” sound from the 
Deluxe model. The bottom position is a new setting limited to this version using germanium diodes for a 
warm vintage distortion.

THE THUNDERDRIVE DELUXE LTD (K-956)

Unplug when not in use 

to save battery life.

OUTPUT

DISTORTION

DIODE SWITCH

LED

Warning:  This circuit was designed for use with a 9 VDC power supply only.

Signal Input

(From Guitar)

Signal Output
(To Amplifier)

Summary of Contents for K-956

Page 1: ...layer of distortion at lower volume This version is equipped with a three position diode selector switch The switch offers three different settings and tones The top position is the classic silicon cl...

Page 2: ...ponents 7 Section 4 Wire Remaining Connections 8 ASSEMBLY DRAWINGS 4 Drawings 9 10 These are the last 2 pages They should be separated and used as a reference to help assemble the kit correctly 2 TOOL...

Page 3: ...W SC 12B 1 Stranded Wire 22 AWG Red K PUL1569 3 FT PARTS LIST 1 3 RING LUG SLEEVE LUG TIP LUG GROUND LUG TIP LUG 250k Potentiometer Audio Taper R VBM 250KA SS 2 Terminal Strip with 5 Terminals P 0501...

Page 4: ...d 2M R A2M 1 2M Resistor W P Q2N5088 1 NPN BJT 2N5088 2N 5088 E B C 1N4148 HIGH SPEED SOLID STATE DIODE P Q971 2 gray red brown gold 820 820 Resistor W R A820 1 Light Emitting Diode P L400 1 DPDT Togg...

Page 5: ...e a good solder joint Take your time with each connection and make sure that all components are connected and will remain connected if your project is bumped or shaken Bend the component lead or wire...

Page 6: ...under nut on outside of box Make sure the tip lug is on top towards the enclosure opening before tightening nut We will refer to terminal numbers from 1 to 5 as illustrated You might want to connect...

Page 7: ...them by bending and crimping the leads around each other Solder them once they are tightly connected to each other 5 Take the two 1N4148 diodes and place their bodies side by side with the reverse pol...

Page 8: ...output pot lug 2 to footswitch lug 7 Finish it off by double checking all of your connections connect and insert a 9V battery screw the lid on and fasten the knobs to both pot shafts RING LUG SLEEVE...

Page 9: ...1 2 1 8 3 8 3 8 3 8 1 4 1 4 3 8 DRAWING 1 TOP LEFT SIDE RIGHT SIDE DRAWING 2 INPUT JACK OUTPUT JACK 1 5 2N 5088 4 7K 2M B E C DISTORTION POT HOLE 9...

Page 10: ...NPUT JACK OUTPUT JACK 1 5 2N 5088 4 7K 2M B E C OUTPUT POT DISTORTION POT 1 2 3 1 2 3 DRAWING 4 INPUT JACK OUTPUT JACK 1 5 2N 5088 4 7K 2M B E C OUTPUT POT DISTORTION POT 1 0 4 J 104J 1 2 3 4 5 6 7 8...

Page 11: ...ORTION 820 Foot Switch B 5 4 6 3PDT Foot Switch 1 2 3 4 5 6 7 8 9 Switching function of the 3PDT switch The solid line illustrates an internal connection between terminals 1 2 3 4 5 6 7 8 9 1N34A 1N34...

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