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Test the board!

Check the relevant daughterboard document for more

info before you undertake this stage.

UNDER NO CIRCUMSTANCES will troubleshooting help

be offered if you have skipped this stage. No exceptions.

Once you’ve finished the circuit it makes sense to test is before starting on the switch and LED

wiring. It’ll cut down troubleshooting time in the long run. If the circuit works at this stage, but it

doesn’t once you wire up the switch - guess what? You’ve probably made a mistake with the switch.
Solder some nice, long lengths of wire to the board connections for 9V, GND, IN and OUT. Connect

IN and OUT to the jacks as shown. Connect all the GNDs together (twist them up and add a small

amount of solder to tack it). Connect the b lead to the 9V wire, same method. Plug in. Go!
If you’re using a ribbon cable you can tack the wires to the ends of that. It’s a lot easier to take them

off there than it is do desolder wires from the PCB pads.
If it works, carry on and do your switch wiring. If not... aw man. At least you know the problem is

with the circuit. Find out why, get it working, THEN worry about the switch etc.

Your completed circuit board

including pots

Summary of Contents for Repeater V4

Page 1: ...eater V4 Modded and updated Vox Repeat Percussion Contents of this document are 2019 Pedal Parts Ltd No reproduction permitted without the express written permission of Pedal Parts Ltd All rights reserved ...

Page 2: ...SUPPLY 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 with higher ratings but check the physical size of them Electrolytics caps should be at least 25V for 9V circuits 35V for 18V circuits Again check physical size if using higher ratings LAYOUT CONVENTIO...

Page 3: ...EPTH 500KC or B RATE 100KC or B VOL 47K Trimmer Switch SPDT ON ON Original was 4n7 but this gives a really thin sound Both caps are included but any ticking may be more pronounced with the bigger value Added along with switch to give a bigger range See notes on page five Many high gain NPN wil work here e g 2N3904 MPSA18 2N5089 Solder C4 last Once in place you ll have difficulty getting at the swi...

Page 4: ... capacitors go into the square pads Snap the small metal tag off the pots so they can be mounted flush in the box The small metal tag on Q3 should be positioned as shown above in red the legs will sit naturally in the holes in this position SWITCH If you re using a board mounted micro toggle you re going to have to be very neat and careful Solder in C2 first and ensure you have very clean solder j...

Page 5: ...o change R10 to a 4K7 5K trimmer and add R15 3K9 The PUT fits in the pads shown This feature is taken from the Moosapotamus Skippy The UJT in this circuit can produce an audible tick It can be reduced or even eliminated by adjusting the value of R10 This does have a trade off in that the circuit may lock up at higher rates For this reason we ve changed R10 to a trimmer If using a 2N2646 for Q3 use...

Page 6: ...mistake with the switch Solder some nice long lengths of wire to the board connections for 9V GND IN and OUT Connect IN and OUT to the jacks as shown Connect all the GNDs together twist them up and add a small amount of solder to tack it Connect the battery lead to the 9V wire same method Plug in Go If you re using a ribbon cable you can tack the wires to the ends of that It s a lot easier to take...

Page 7: ... jack then daisy chain that over to the OUT jack It doesn t matter how they all connect as long as they do This circuit is standard Negative GND Your power supply should be Tip Negative Sleeve Positive That s the same as your standard pedals Boss etc and you can safely daisy chain your supply to this pedal L E D BOARD OUT BOARD 9V BOARD GND BOARD GND BOARD GND BOARD INPUT BATTERY IN OUT L E D BOAR...

Page 8: ...closures FuzzDog co uk Drilling template Micro switch Hammond 1590B 60 x 111 x 31mm It s a good idea to drill the potholes 1mm bigger if you re board mounting them Wiggle room good Recommended drill sizes Pots 7mm Jacks 10mm Footswitch 12mm DC Socket 12mm Switch 5mm 8mm 32mm If you mount the switch right up against the PCB it would be 9mm but it s best to leave a gap so you don t short out the cap...

Page 9: ...n risk Pedal Parts Ltd can accept no responsibility for incorrect drilling of enclosures FuzzDog co uk Drilling template Normal switch Hammond 1590B 60 x 111 x 31mm It s a good idea to drill the potholes 1mm bigger if you re board mounting them Wiggle room good Recommended drill sizes Pots 7mm Jacks 10mm Footswitch 12mm DC Socket 12mm Switch 6mm ...

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