Cleaning potentiometers

[MP1]

Interesting. I am guesing that the 0 becomes some value of resistance as you rotate the knob?
In answer to your question of resistors: I use 1% tolerance resistors on my bench. This keeps a pretty tight margin. For some items, like temperature sensors, etc., I use 0.01% tolerance resistors. You can purchase these from places like digikey and mouser.

MP

 

[audioguru2]

OK. Here I have in front of me 2 spray cans. Both Philips. One is the blue "DEGREASER CLEANER", the other is the red "CONTACT CLEANER". So, the blue should be good for cleaning e.g. connectors. The red should be good for cleaning pots. Correct?

Duh! Guess? ???

 

[ante1]

Hi Nid,

Well, “video drum cleaning spray” was the description a couple of years back. Today I use this:
http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=604082&N=401

The WD40 can will not blow in your hand as long as there is pressure inside, the flame will keep some distance to the nozzle. Just watch your eyebrows! ;D

 

[Dead_Nid]

thanx Ante. Is this stuff nice for cleaning reel-to-reel tape recorders' heads too?

Interesting. I am guesing that the 0 becomes some value of resistance as you rotate the knob?

MP, what 0 ? If you mean the 0 at my rough drawing then this is the resistance at pins 2-3 at gang-1 and 1-2 at gang-2 ONLY when the pot is at the fixed center position. If I rotate it then the resistance rises with values from 0 to approx. 88K or 82K (depending on the gang).

 

[MP1]

Yes, that is what I meant. Thanks for clarifying.

MP

 

[ante1]

Hi Nid,

Yes I am sure it will work fine on the “old” kind of tape heads too!