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Potentiometers for Fender Amplifiers
Note: A pot is
variable resistor.
Most common
guitar pots have a layer of conductive carbon deposited on a
non-conductive
phenolic plastic base. A metal "wiper" sweeps along this carbon
variable
resistance path as the pot shaft is rotated, allowing us to change the
resistance and thus choose the level of attenuation. The density
pattern
of the carbon deposit determines the taper of the pot. A linear taper
pot
changes resistance evenly; at about half rotation (12 o'clock) you'll
get
roughly half the total resistance of the pot. An audio (A.K.A.
"logarithmic")
taper pot works differently; you'll have to turn it up to about three
quarters
rotation to measure one half of the resistance value of the pot. Try
this
yourself with an audio taper pot, a linear taper pot and an ohm meter.
Looking down at the top of the pot with the solder lugs facing away
from
you, put your two meter probes on the left-most and center solder lug.
Now turn the pot all the way counterclockwise and you should measure
the
total resistance of the pot (e.g. 500K or so...). Now turn the pot
shaft
clockwise to about half rotation; it helps to have a pointer type knob
on the shaft to keep track of the rotation. If you're measuring a
linear
taper pot, about half rotation should give you half of the total value
of the pot. If you turn this linear taper pot up about three quarters
rotation
you'll measure 20-25% of the total resistance value. When you turn the
pot up all the way clockwise you will probably still measure some
resistance,
say 2 to 60 or so ohms. Now try to measure an audio pot. You find that
the resistance changes only 15-20% or so at half rotation, reading half
the total resistance value only after you've reached almost three
quarters
rotation and then it drops rapidly (logarithmically...). Audio taper
pots
are commonly used when fine adjustment is needed at lower listening
levels.
There are many other pot tapers available. In my experience, different
examples of even" standard" tapers such as "audio" can vary quite a bit
in how they feel to a guitarist. Here again, experimentation with
different
pots may be worthwhile. Remember that a pot is not an amplifier; it can
only attenuate signal.
250K Audio Taper Amplifier Potentiometer
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1 Meg Audio Taper Amp Pot With Switch For Vintage Amps
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Fender 1 Meg Snap In J Taper Amp Pot
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Fender 25K Snap In Amplifier Potentiometer
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Fender Amp Potentiometer By CTS 100 Ohm Hum Balance
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Fender Amp Potentiometer By CTS 10k Audio
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Fender Amp Potentiometer By CTS 10k Bias Pot
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Fender Amp Potentiometer By CTS 5K Audio
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Fender Amp Potentiometer By CTS 5K Linear
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Fender Nickel Lock Washers For Fender Pots & Jacks, 12
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Twelve Genuine Fender Nickel Plated Hex Nuts For U.S.A. Pots and Jacks.
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Fender Snap In Mini Pot 1 Meg
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Fender Snap In Mini Pot 1 Meg Audio
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Fender Snap In Mini Pot 100K 30C Taper
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Fender Snap In Mini Pot 100k B Taper
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Fender Snap In Mini Pot 250K
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Fender Snap In Mini Pot 250K Audio
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Fender Snap In Mini Pot 250K Audio Taper
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Fender Snap In Mini Pot 250K Audio Taper with Tap
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Fender Snap In Mini Pot 250K
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Fender Snap In Mini Pot 25K B Taper
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Fender Snap In Mini Pot 25K Linear Taper
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Fender Snap In Mini Pot 2K 15A Taper
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Fender Snap In Mini Pot 50K 15A Taper
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Fender Snap In Mini Pot 50K Audio Taper
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Fender Snap In Mini Pot 50K Linear Taper
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Fender Snap In Mini Pot 50K Linear Taper Center Detented
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Lockwashers, Black, CTS, 1 Dozen
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Switchcraft Beauty Washers For Pots, Jacks Etc.
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Switchcraft Hex Nuts For Pots, Jacks Etc.
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