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Yet more important notes

specific to this circuit

CHANNEL ORDER

Our version of this circuit runs left channel (A) into right channel (B).

Why? Because that’s how it should be. If you don’t like it you’re welcome to

wire up the daughterboard differently, wiring IA and OA to IB and OB, and vice

versa. You should also flip the daughterboard and put the switches on the

other side. You’ll have to use long wires for the jack connections, but that’s

the price of putting it together differently to how it was designed.

HIGH GAIN VERSION

We can only go off the info that is out there in space. As far as we know, no-

one has identified the IC used in the new high-gain channel. Other

components have been identified and are (using Channel A BOM as ref):

R5

100K

C1

22n*

D5-6

1N1418 or 1N914

We cannot confirm these changes, so it’s up to you whether you want to

implement them. Without the specific IC used it’s unlikely to sound the

same as the original.

*The input cap is supposedly 22n on the input of both channels in the

high-gain version.

Summary of Contents for Emperor Dual OD

Page 1: ...r Dual OD Blues Breaker based boutique drive action Contents of this document are 2017 Pedal Parts Ltd No reproduction permitted without the express written permission of Pedal Parts Ltd All rights re...

Page 2: ...UPPLY Unless otherwise stated in this document this circuit is designed to be powered with 9V DC COMPONENT SPECS Unless otherwise stated in this document Resistors should be 0 25W You can use those wi...

Page 3: ...jack connections but that s the price of putting it together differently to how it was designed HIGH GAIN VERSION We can only go off the info that is out there in space As far as we know no one has id...

Page 4: ...nnections for the 4 way DIL clipping selector switch are shown above S1 1 S1 4 Switches 1 and 2 will connect the two sets of diodes for circuit A 3 and 4 for circuit B You can engage one both or neith...

Page 5: ...elec C24 100u elec D1 4 MA856 D5 6 1S1588 D7 10 MA856 D11 12 1S1588 D13 1N4001 D14 15 1N4148 IC1 7660S ICA B 4580 VOL 100KA GAIN 100KB TONE 25KB PRES 50KB OR 47 50K TRIMMER S1 4 WAY DIL SWITCH Only re...

Page 6: ...clip or reverse action tweezers on each leg as you solder them Keep exposure to heat to a minimum under 2 seconds Same goes for the ICs if you aren t using sockets You should solder all other board mo...

Page 7: ...nsure switch lugs are horizontal as shown in red above OPTICAL BYPASS R1 2 2K2 C1 2 220n these go on the underside of the PCB with the switches OK1 2 TLP222G SW1 2 DPDT ON ON Ignore the two small pads...

Page 8: ...n joining the two PCBs together It s best to lay C5 C18 C23 and C24 flat against the board Use EITHER a pot or trimmer for each PRESENCE control You can t use both If using trimmers make sure you put...

Page 9: ...ke the board away from the enclosure and do a visual check of the alignment If any are sitting at a different height to the others melt the joint and adjust Once you re happy everything is as it shoul...

Page 10: ...hardware such as anti vibration washer or locknut Loosely fasten them in from the other side using the other nut Ensure they can still be moved Do the same with your main PCB drop the pots through th...

Page 11: ...as shown below If you don t want to use a battery just leave those connections out Obviously not to scale You can use any type of jack sockets you like if you can fit them into your enclosure We ve op...

Page 12: ...rilling of enclosures If you print this out please measure the distances to ensure your printer hasn t increased or decreased the size FuzzDog co uk Drilling template Hammond 1590BB It s a good idea t...

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