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From: Kim Mallory
Ricks Answer to - wiring headache
Sent: Sunday, July 11, 2004 9:12 PM
I have a P megaswitch (Stewart-MacDonald) and 2 4-lead pick-ups; seymour duncan
Dimebucker in bridge and Custom/Custom in neck pos. I am installing them in an
ESP that has 3 knobs; including a concentric V/T (so actually 4 pots).
The wiring diagram only shows a 2 pot V/T config. This model (ESP LTD MG-550) comes
with only 2 pots, volume & tone. The dual-concentric was not part of the original
circuit, it was installed by the owner of the guitar who drilled the extra hole into the
face and then asked me to wire the pots, replacement pickups, and P-Megaswitch
Using the diagram that comes with the P-Megaswitch will only utilize
2 pots, the way I read it. I am not proficient in electronics but have wired
several guitars using schematics and Don Brosnac's book "Electronics For
Musicians"as a guide, including series/parallel and phase mini-switches in a guitar
I built. However, this has me baffled as far as my options in using the other 2 pots.
Any suggestions would be greatly appreciated! Also,will I have to flip the magnet
in one pickup for the prs style to work correctly?
From: Rick Andrews
Sent: Sunday, July 18, 2004 1:00 PM
OK Andy, I think you have split coil pickups since each have 4 wire leads.
In my own personal way of thinking here I would probably want it as of the
one master volume knob, then the three tone pots can be done as one tone
for each pickup and is would be nice to use the V/T tone pot as master tone
for the overall final output of the signal.
In other words you would have individual pickup tone pots and one master volume,
and one master tone control. That really works great so you can EQ the overall master
tone to proper settings in different halls or places you play. Still keeping the
different tone setting between pickups this enables you to change the overall output
tone to match the acoustics of where you are. You don't have to change both pickup
I personally love that capability. Your V/T pot can be for your masters and the
other separate pots can be the individual pickup tone controls. The magnets
should be OK as is but one could experiment.
Hello, this is Rick Andrews owner of Andrews Guitar and a long time member of EvO:R. This section has been
put together to help you with your guitar related questions. I did not agree to do this
so I could simply plug my guitars, I did this so you could finally have answers
to many of those burning questions you may have had about your guitar.
We will discuss anything related to the guitar, so if you have a question about guitar
construction, neck action, string height, pickups, simply send it to me and I'll answer your
question on this open forum. Questions or comments email: firstname.lastname@example.org
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