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Vintage POW! Clone of Colorsound’s Overdriver / Power Boost PedalParts.co.uk...
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Schematics OVERDRIVER POWER BOOST Subtle differences between the two, in the connections from Q1 and Q2 emitters. Overdriver runs at 9v, Power Boost at 18v (though it works ok at 9v).
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**Note position of Base, Emitter and Collector for Q1-3. More about that overleaf. For R4 in the Overdriver, place a wire across the two 120K 120K 220n 220n pads to join them together 150K 150K Jumper 470R 220p 220p Empty Empty Q1-3 BC109 or...
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Wiring shown overleaf will disconnect the battery when you remove the jack plug from the input, and also when a DC plug is inserted. Snap the little metal tag off the pots to mount them flush in the box. You MUST use some kind of heat sink on the legs of the transistors when soldering.
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Test the board! A A T 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.
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Wire it up - Overdriver 9V BOARD BOARD INPUT BOARD BOARD BOARD BOARD LED+ BOARD BOARD BATTERY The Board GND connections don’t all have to directly attach to the board. You can run a couple of wires from the DC connector, one to the board, another to the IN jack, then daisy chain that over to the OUT jack.
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Wire it up - Power Boost 18V BOARD BOARD INPUT BOARD BOARD BOARD BOARD LED+ BOARD BOARD **If you’re only going to power it with an 18V adapter just omit the battery snaps altogether The Board GND connections don’t all have to directly attach to the board. You can run a couple of wires from the DC connector, one to the board, another to the IN jack, then daisy chain that over to the OUT jack.
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