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ColoredThro v1.0 

 

Manufacturers and product names are mentioned solely for circuit identification, and where applicable their trademarks are the 
property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement 
is implied.

 

Components 

This PCB gives you the option to build a clone of either a Colorsound Powerboost, 
Colorsound Overdrive or Throbak Overdrive Boost. Parts differ per type as described in the 
table below. Decide which one you want to build and choose the appropriate parts. You 
should also take a good look at the mods section for other options and required parts. 

 

Colorsound 

Throbak 

 

 

Colorsound 

Throbak 

Part 

Power boost  Overdriver 

Overdrive Boost   

Part 

Power boost  Overdriver 

Overdrive Boost 

C1 

220n 

220n 

220n 

 

IC1 

ICL7990S 

ICL7990S 

ICL7990S 

C2 

22u 

10u 

22u 

 

Q1 

BC169C 

BC109 

2N2222A 

C3 

22u 

22u 

22u 

 

Q2 

BC184C 

BC109 

2N2222A 

C4 

22u 

22u 

22u 

 

Q3 

NC 

NC 

2N404 

C5 

220p 

220p 

200p 

 

Q4 

BC109 

BC109 

2N2222A 

C6 

10u 

10u 

4u7 

 

R1 

NC 

NC 

2M2 

C7 

10n 

10n 

10n 

 

R2 

150k 

150k 

150k 

C8 

100n 

100n 

100n 

 

R3 

1k2 

470R 

470R 

C9 

100n 

100n 

100n 

 

R4 

120k 

120k 

120k 

C10 

10n 

10n 

10n 

 

R5 

jumper 

12k 

12k 

C11 

22u 

10u 

22u 

 

R6 

4k7 

4k7 

4k7 

C12 

220n 

220n 

220n 

 

R7 

5k6 

5k6 

5k6 

C13 

10u 

22u 

22u 

 

R8 

39k 

39k 

3k9 

C14 

100u 

100u 

100u 

 

R9 

4k7 

4k7 

4k7 

C15 

100n 

100n 

100n 

 

R10 

180k 

150k 

150k 

C16 

10u 

10u 

10u 

 

R11 

33k 

33k 

33k 

C17 

10u 

10u 

10u 

 

R12 

1k2 

470R 

470R 

Cx 

100p 

100p 

100p 

 

R13 

12k 

NC 

NC 

D1 

NC 

NC 

1N34A/1N270 

 

R14 

470R 

jumper 

jumper 

D2 

1N5817 

1N5817 

1N5817 

 

SW1 

jumper 2-3 

jumper 2-3  2PDT/3PDT 

D3 

1N5817 

1N5817 

1N5817 

 

SW2 

NC 

NC 

SP3T ON/OFF/ON 

D4 

1N4001 

1N4001 

1N4001 

 

SW3 

SPDT 

SPDT 

SPDT 

D5 

NC 

NC 

LED Red 5mm 

 

VR1** 

B10k 

B10k 

B10k 

D6 

NC 

NC 

LED Red 5mm 

 

VR2** 

B10k 

B10k 

B10k 

P1* 

NC 

NC 

B500k 

 

VR3** 

B10k 

B10k 

B10k 

P2 

B10k 

B10k 

C10k 

 

 

 

 

 

P3 

B100k 

B100k 

B100k 

 

 

 

 

 

P4 

B100k 

B100k 

B100k 

 

 

 

 

 

P5 

Jumper 2-3 

Jumper 2-3  A100k 

 

 

 

 

 

 

Capacitors with values < 1nF are MLCC, values of 1nF – 1uF are SMF (except C15, which can be MKT) 
and all values > 1uF are Electrolyte. P1-P5 are 16mm Alpha pots (A=log, B=linear, C=rev. log) , VR1-
VR3 are 6 mm trimpots. 

All parts must be rated 25V+ 

* The Throbak uses an internal pot. Use a Alpha 16mm (external) or a Bourns 3296W style (internal) trimpot 

** See the 

Biasing

 section for options before choosing to solder the trimpots!

 

 

Содержание ColoredThro

Страница 1: ...ColoredThro Building instructions v1 0...

Страница 2: ...4 Power section 5 Modifications 6 Gain mod 6 Transistors 6 Mix and match 6 Feedback capacitor 6 Additional clipping options 6 Build sequence 7 Off board wiring 8 Potentiometers 8 Miniswitches 8 Foots...

Страница 3: ...for circuit identification and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author No cooperation or endorsement i...

Страница 4: ...0n R2 150k 150k 150k C8 100n 100n 100n R3 1k2 470R 470R C9 100n 100n 100n R4 120k 120k 120k C10 10n 10n 10n R5 jumper 12k 12k C11 22u 10u 22u R6 4k7 4k7 4k7 C12 220n 220n 220n R7 5k6 5k6 5k6 C13 10u 2...

Страница 5: ...1 J1 and SW3 Extra jumpers SW3 on 9V pad and middle pad The effect can now be used with a standard 9V adapter or an 18V adapter 2 Charge pump using a ICL7660S Place all components as stated on the PCB...

Страница 6: ...when inserting the transistor in the correct pads Q3 only used in the Throbak can be any germanium PNP transistor you like 2N404 AC128 AC132 etc or you could even replace it with a germanium diode by...

Страница 7: ...ldering them to the board You ll need a some 20 SIL sockets break off the sockets and solder them to the board Now is the time to solder these sockets on the PCB as well as the socket for the IC Place...

Страница 8: ...correct pin numbering of the pots Alpha 16mm style Solder the wires accordingly and it is always a good idea to twist the wires together to create a sort of extra shielding against external noise You...

Страница 9: ...at R led1 and R led2 are 4k7 resistors You can change this value depending on the type of LED you use but 4k7 is safe enough for almost all LEDs for both 9V as 18V It is now time to place your transis...

Страница 10: ...n pot P1 remains in the circuit even when pre gain is switched off This may cause some unwanted behavior of the pre gain pot When you turn it all the way down it will cut off all sound as it will grou...

Страница 11: ...given values Start by setting the trimpots to the values mentioned in the table preferably before soldering them to the pcb To measure the resistance correct use an digital multi meter and measure th...

Страница 12: ...you oriented the capacitors IC s transistors and diodes the right way SMF MKT and ceramic capacitors as well as resistors do not need to be oriented A likely sign of incorrect capacitors and or orient...

Страница 13: ...es are mentioned solely for circuit identification and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author No coope...

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