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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.

 

Off board wiring 

Potentiometers 

In the pictures below you see the 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 can break off the pin I marked with the yellow circle with a small pair of pliers. 

 

 

 

 

 

 

Miniswitches 

 

 

* The Throbak uses an internal trimpot for the pre-gain. If you do not want an extra external pot you 
can substitute the P1 Alpha pot for a internal trimpot (Bourns 3296W style) 

 

 

1       2      3 

1       2       3 

1       2      3 

P1 Pre-gain* 

P2 Gain 

P3 Treble 

1       2      3 

1       2      3 

P4 Bass 

P5 Volume 

Summary of Contents for ColoredThro

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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