following troubleshooting information is generalized to deal with
most wah pedals. If you have a different problem, or the suggestions
do not help, feel free to contact us. When contacting RMC with specific
problems, always be sure to include the serial number of your RMC
If your FFT equipped
RMC wah has too high of an output for your rig and is causing distortion,
feedback, or funky harmonics, please contact me for an easy (soldering
required) fix. These units can be identified by a silver (or black
on the WW/RMC5) signature on the bottom plate. New, gold signature
units already feature this modification.
Q: How can I make my rocker tighter?
A: If you have an older RMC wah, this answer can be found on the ADJUSTMENT
HELP page. As of October 2006, all RMC wahs have easily adjustable rocker tension
with adjustment under the rear of the rocker.
Q: My switch is acting weird and won't engage all the time. What is going on?
A: This answer can also be found on the ADJUSTMENT HELP page. As of October
2006, we have ceased using the blue 3PDT in favor of a more reliable switch.
Q: My wah makes
a scratchy sound when I sweep with the rocker.
A: The best bet is your older (CTS built if an RMC wah) wah pot has some foreign
matter stuck on the interior carbon track. When the wiper goes over the gunk
is no scratch as the wiper doesn't lose contact with the carbon track. When
the wiper goes over the gunk fast (regular speed of use) then the wiper loses
contact with the carbon track and makes a noise when it reconnects. Use spray
tuner cleaner/lube such as RADIO SHACK #64-4315. Do not use simple compressed
air. If the spray does no good then the pot should be replaced. This spray
works great on amp controls also and should be part of every player's crash-kit.
If your wah is an RMC,look at the rear of the pot and you'll see a black plastic
dust seal. That dust seal can be moved/removed. The access to the pot's interior
directly below/underneath the 3 solder lugs. That is where you will direct
the cleaner/lube spray. Spray heavily, rotate the pot several times, spray
again, rotate again. WEAR EYE PROTECTION!!! RMC wah owners
should use WD-40 instead of a tuner cleaner/lube. According to my original
ROC-POT manufacturer, CTS, WD-40 is the recommended cleaning agent for my RMC
ROC-POTS. WD-40 is NOT
recommended for pots that are not RMC ROC-POTS (1-4). The CTS pots generally
have a 250,000 cycle lifespan.
Q: My wah picks
up radio signals.
is an age old problem with wah pedals. Contact me directly so I can determine
the proper solution, which depends on the model and revision that you own.
Current RMC wahs have several types of RFI blocking as standard.
Q: I get a squeal when I turn on the wah.
A: The older, case-mounted input jack could be out of alignment. Without removing
the plug in the input, take off the bottom plate and inspect the jack/plug
connection. The tip connector on the jack is probably not seated properly on
the plug tip. This can happen with most any free-standing jack. Also,
make sure input is input (from the guitar) and output is output (to the amp). Some
British wahs have reversed ins and outs. You could also try increasing
the distance between your wah and amp.
Q: My wah has started getting static, or buzzing, or makes a strange noise
when I turn it on or off.
A: Check the older, case-mounted input and output jacks to see if they are
tight. A loose jack can cause any number of problems, not limited to those
mentioned. These symptoms (in addition to no or intermittent signal)
could also indicate a failed or failing on/off switch. Also check to make sure
the bottom plate is secure.
Q: I received
a new switch for my wah but I don't know where the wires go. There
are more solder lugs than the Carlings.
A: Here's a shot of the wiring of my 3PDT switches (dropped in late 2006). Be
careful when soldering because the switches are heat sensitive. Solder the
lugs on either end first so you don't burn the insulation on the middle
green and white wires. To get the right switch height, use either one
of the nuts, the toothed washer, or the plastic washer as the spacer between
the switch body and the interior of the
case. If you use one of the washers, do NOT over-tighten the top hex nut. Just
make it snug so you don't rip the switch bushing apart. More info can be found
on the ADJUSTMENT HELP page.
Q: My wah hums
with a power adapter.
A: Most power adapters are poorly filtered, if at all. Even wahs with
power filters built-in can hum with
some of the power systems out there. Try adding a diode (1N914 is cool)
to the adapter jack's "+ power" to the board wire . The "clear
glass" end towards the jack, the end with the stripe gets the wire lead. If
that is not enough, add a 100uF/25V electrolytic cap between the + (striped)
end of the diode and the power jack's negative lug. The next Q/A (below) is also
of great importance. All RMC wahs already have power filtering. If your RMC wah
hums then the most likely cause of the problem is an EMI source close to the
wah. Our new Karmaflux inductor is fairly impervious to EMI. RMC can install
a Karmaflux inductor in any RMC wah, new or old, that has an EMI hum problem.
Q: My wah hums
and I only use batteries.
A: This is an age old problem. Traditional wah inductors are very
sensitive to EMI and power leads, just like old single-coil pickups. This
include cables running to and from power
supplies. Try moving your wah away from other cables and from power supplies. If
well, you'll need to re-think your pedalboard layout. If it still hums,
check to see if both jacks are secure. Tighten if needed. The hum
could also be caused by a failed or failing on/off switch, although this is rare. Be
attentive of any switching problems to help ID the problem as being switch related.
If you are using a power supply for other effects then the power supply could
be causing the electromagnetic interference (EMI). If you are using other effects
that have a power supply or transformer inside them, then that effect is possibly
causing the hum to appear in your wah. The only way to determine the EMI source
is by trial and error, removing the power from EVERYTHING, including the power
to any battery eliminating power supply, turning the wah on, and listening as
you power up each device, one device at a time. This is a time consuming process
but it is the only way to determine the source of the EMI bubble. Our
new Karmaflux inductor is fairly impervious to EMI. RMC
can install a Karmaflux inductor in any RMC wah, new or old, that has an EMI
hum problem. Karmaflux inductors are not available for DIY installation.
Q: I need to change
my pot. How do I do it?
A: The following is a copy of the instructions the Thomas Organ Company included
in their first issue wahs. My old CTS pots were designed with an extra-long
bushing in order to resemble the old Icar pots. These long bushings require
the addition of 2 large metal washers to shore up the excess bushing length.
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