Hi
I am trying to repair an old camera and came across these tiny variable resistors (I think).
Does anyone know if that’s what they are called? Also where can I buy these? They only have two ends instead of three on ones I am able to find on Amazon.
They're rheostats.
You can try vendors like: Mouser, Digi-Key, and Newark.
Omg. Thanks a lot. I have been trying to figure this out since at few days.
Appreciate your help.
Also caller trimmer resistors or trimpots.
Thanks a lot.
Somehow I am not able to find these anywhere only :(. I searched up Digikey as well as Mouser.
Every available trimmer has three ends, not two like these.
One of them is 22k and other is 88k.
Could I use something else as replacement for these?
That does not matter at all. You don't need to use all three terminals. Just use the middle (wiper) and either one of the ends.
The important thing is the maximum resistance, which should be the same as the ones you are replacing. You should try to buy a replacement that has the same power dissipation rating, which is pretty difficult to guess if there are no part numbers to look up on the originals.
How long is a side on those? And how thick are they? You could use any 25K and 100K trimmer pot that would physically fit in the available space. I'm making the assumption that they aren't dissipating a whole bunch of power; most of the small trimmer pots are typically 1/10W, maybe going up to 1/2W on the larger end of things.
Those trimmers actually have 3 leads, the wiper is connected to one end, the left side as viewing your picture. If my memory is correct they are carbon composition pots, they are designed as cheap parts. Your replacements do not have to be carbon but just about anything that has the value and can can support the current.
How did you measure them??? Did you set the movable contact to the closest end and then measure or did you leave the wiper at the position in the picture and then measure? IF the latter way, then you only measured the active part of the resistor, not the TOTAL resistance.
btw, not sure is that is 88K or 33K 
The text is wearing out.
Thanks a lot. So in a 3 pin component I believe one needs to measure the resistance between the middle pin and either of the two pins, right? I tried measuring that way for one of my potentiometer and I got opposite readings depending on which side pin I connect. Would these trimmer resistors also behave like this?
Notice how the dial is connected to one endpoint. They are rheostats, nothing less or more.
looks like it's 33K 
Look it up at Wikipedia, it's explained very good.
And 22k, ....also it was already said 
What camera is it?
I'd bet the smudgey numbers are a 68K standard value. You can measure it by turning it all the way to the shorted end and measuring from 1 terminal to the other.
The built-in shorting makes it so if the contact is bad/noisy/open circuit, the resistance across the two terminals is at most 68K(?), not an open circuit.
It's Miranda Fv T. It's from mid 1960s.
http://camera-wiki.org/wiki/Miranda_Fv
I got it from an online auction and now trying to fix the light meter
The reason I am trying to find an alternative is that the measurements across it is very erratic and unreliable. Looks like the connections have gone bad. Sometimes I get a reading sometimes I dont. If I get the reading, its not the same very time. It's really old (1966), and also looks like someone had tried to repair it.
