- Single gang
- Solder lugs
- Reverse Taper
What does the "K" stand for?
250,000 ohms =
250 Kilo ohms = 0.250 Mega ohms
Ω = 250 KΩ = 0.250 MΩ
E = 250 K = 0.250 M
standard measurement of resistance is ohms, which is symbolized
either with the Greek letter Omega, Ω, or by the letter "E."
for kilo, which means 1000 or alternatively and simply written as
10^3. So the K
potentiometers represents 1000 ohms. You will also run across M.
the equivalent of 1000 kilos or 1,000,000 ohms, and can also be
written as 10^6.
A, B, & C -- What is the difference?
letter before the value corresponds to the taper of the
potentiometer. The taper is the relationship between the rotation of
the potentiometer's shaft to the changing resistance.
also know as Logarithmic,
taper potentiometer increases slowly at first and then increases more
quickly the further you turn it. An example of the relationship
between an audio taper potentiometer's rotation and resistance,
starting from the furthest left position and rotating towards the
right, would be: a 1/4 turn would be ~ 5% of the total resistance, a
1/2 turn would be ~ 10% of the total, and then the rest of the
rotation would be a rapid increase towards the total resistance of
the potentiometer. To the human ear in order to hear twice the volume
there needs to be an increase of ten times. This type of
potentiometer is designed to match the human ears' logarithmic nature
of hearing volume and provide a smoother transition from low volume
to high volume when compared to a linear taper.
taper potentiometer increases in a linear manner as you would expect
(i.e., 1, 2, 3, 4) as you rotate the potentiometer to the right. This
means if we start with the potentiometer in the utmost left hand
position and rotate it rightward we would get a relationship as
follows: a 1/4 turn is equivalent to a 1/4 of the total resistance, a
1/2 turn is equal to 1/2 the total resistance, and a full turn is
equal to the total amount of resistance.
audio taper potentiometer also increases logarithmically, but
backwards compared to a regular audio taper. The resistance increases
very quickly on this type of potentiometer until you reach the
halfway point, from which it increases very slowly. A 1/4 turn on the
potentiometer would be ~ 75% of the total resistance, a 1/2 of turn
would ~ 95% of the total resistance, and a full turn would be the
This is special type of potentiometer used for the tone circuit in
Tube Screamer overdrives.