Potentiometer Markings: Understanding A, B, W Types & Differences (e.g. 2.2k-A, 100k-W)

I know that there are different markings of the potentiometers
e.g. 2.2k - A; 2.2k - B

How are they different ??
There is also a "W" marking and I care about it the most because I need such 100k-W, and I can't get it. The guy in one skep told me that this is the first time he has heard of such

Honestly, I also met the designation W for the first time, write to what and maybe we will come up with something.

As for the markings, they mean as much as the first number is the resistance of the resistor, i.e. 2.2k is just 2.2 kiloohms (2200 ohms), and this letter - A or B - is the characteristic: A - linear, B - logarithmic (or vice versa but rather yes), and what does it mean: linear - if you have, for example, a 1k resistor, if you set it to 10%, you will have a resistance of 100ohm, and as for 50% it is 500ohm, while the logarithmic is such that the closer to the end, the more resistance goes up (like a logarithm plot)

As previously stated:
A- is a potentiometer with a linear characteristic
B- is a potentiometer with an exponential characteristic
C- is a potentiometer with a logarithmic characteristic.
Potentiometers B and C are usually used to adjust the volume (or gain) in acoustic amplifiers due to the specificity of human hearing.
The letter W means the potentiometer power, e.g. 025 W means a potentiometer with a power of one quarter Watt.

hefid I think you made a mistake and it should be;
B- potentiometer with logarithmic characteristics
C- potentiometer with exponential characteristics
... the rest o, key

you know what it is when you don't read the texts exactly. I am making a mixer with PE 9/2002 and subsequent numbers and there are potentiometers marked with the letter W in the voice equalizer.
whatever that means, I can't get such potentiometers in Zabrze, so which one should I use ??????????

With these characteristics it is different, according to one wise book the type B potentiometer has an exponential characteristic, and according to another wise book it has a logarithmic characteristic. And I do not know what it should be like, if someone knows 1000%, let him say it
As for this W-type potentiometer, I have the impression that this letter does not mean the characteristics of the potentiometer, although I may be wrong. Usually, in tone controls, linear potentiometers (type A) are used. Unless it's some audiophile mixer

All in all, give the potentiometer you want there, you will have a problem with the accuracy of regulation related to the non-linearity of human hearing

The characteristic of S is so arranged that at the ends it allows for more precise control and when passing through the center (I think so when I understand this description)

This can be done from an ordinary pot by adding an RC circuit to it

But I think I gave the markings of the potentiometers correctly, so far they have been labeled in POLISH electronics and in all Polish equipment. And I have known these markings for several dozen / at least 45 / years.
This is what manufacturers' catalogs used to say, incl. Krakow's TELPOD, a leading manufacturer of not only potentiometers in its time.
And that would be as Prof. Jan Tadeusz Stanisławski used to say.

And I have such a marking on the 1M2 potentiometer, it is an old tube amplifier and all the potentiometers have 2 at the end.

1M2 is probably 1.2 Mohm - check with a meter how many ohms it has

I also thought it was about 1.2Mohm, but the meter showed a maximum of 700Kohm. But I put on this 1Mohm and it works, so after the trouble.

broda997 wrote:

I also thought it was about 1.2Mohm, but the meter showed a maximum of 700Kohm. But I put on this 1Mohm and it works, so after the trouble.

1M2 is 1.2 Mega Ohm, but when measuring with a meter, you could have made one mistake: you say that the potentiometer was from a tube amplifier, you could measure the resistance on the element connected to the circuit. Then the voltage divider is made, and such an indication is worth nothing (although not always ). It is enough to unsolder one leg in the potentiometer and check it.

M and N potentiometers are probably from the balance?

I made a blunder - I didn't look at the date of the last post I think the questioner has probably already found the answer

I have a question, I just finished the "line of light" I have a M15 potentiometer (I do not know what it means, but the detail ) but my point is that if it gives it at a minimum, the LEDs, in my opinion, are still flashing too quickly, I would like them to walk even more ... do you have any idea ?? Thanks in advance POZDRO

Hello

I have a question.
What potentiometers are usually used for volume control in audio amplifiers? I mean the power value (0.1W; 0.5W; 2W?) The volume control potentiometers are placed between the preamplifier and the power amplifier?

The case is that he is building a guitar stove. The equalizer block has an adder at the output, which also serves as a preamplifier. I do not know what amplification this adder (operational amplifier) has (I downloaded the ready schematic).

What values of potentiometers (power) are usually used in such cases and if I put 0.25W there (shooting, without calculations) it should be enough?

Speaking of the characteristics of potentiometers, some time ago during the lesson we had something like the one in the picture.
A - rectilinear
B - logarithmic (used to adjust the volume gain). This is the whole characteristic of how sound can be absorbed by the human ear.
C - exponential (tone control)