Variable resistor ID. and sourcing.

Status
Not open for further replies.
W

wombweller

Member
Hi all

I'm undergoing a restoration projects on a distribution panel used to distribute the time from a master to wherever is required The panel should have 4 variable resistors but three are missing and the one remaining is shot (not be me)

I'm not sure of the type so I include a photo of your ID. I am looking at purchasing the four resistors but I'm also unsure of where to obtain these so help required.

View attachment 63016

The only numbering on the one remaining resistor is 150 not sure if this is OHMS or not?

looking forward to the advice
 
Last edited:
You should be able to clean the area where the wiper wipes. With two leads disconnected, you can cleck the overall resistance of the reostat and see if it's damaged. Put a probe on one end of the reostat and follow the wiper. Once you know a portion of the value, you can determine the entire value.

The wiper sometimes lifts and/or the wiper gets less springy because it overheated.
 

hi kiss,
The OP wants to replace 3 missing pots.

E.
 
ericgibbs said:
hi kiss,
The OP wants to replace 3 missing pots.

E.
Click to expand...

Hi Eric
At least that's what I'm trying to do!! I actually need four.
There must be someone with a shed full of these exactly the same as I require.
See it's a restoration project and not just a repair.I will take some photos later to show.
 
hi Mark,
You could try winding your own, using nichrome wire on a ceramic former.

Does it need to be adjustable once you now the required value.?
 
Now your asking!!

ericgibbs said:
hi Mark,
You could try winding your own, using nichrome wire on a ceramic former.

Does it need to be adjustable once you now the required value.?
Click to expand...

Hi Eric

Seems a long shot but if that is the way then why not try!!!

The idea behind the panel is to distribute the time throughout a building.The panel gets it's time base from the master clock through 'home loop 1' the remaining loops can have nay number of slave wired up in series to them.

The slaves that connect to this work on approx 330ma at 3v ish. The pot's are used to regulate this within each loop. There is an amp meter on the front panel and a plug that goes into each loop when setting up the pot's for correct milliampage .

Hope this explains... but please explain making these pots!!
 
ericgibbs said:
hi Mark,
You could try winding your own, using nichrome wire on a ceramic former.

Does it need to be adjustable once you now the required value.?
Click to expand...

Hi Eric
Upon further investigation from people who have similar panels when the POT say '150' or '200' then they do measure at that in OHMS.
 
Status
Not open for further replies.

Similar threads

K
  • Question
ID Fuse: SG5A
Replies
6
Views
1K
Tony Stewart
J
  • Question
Variable frequency 555 circuit
2
Replies
29
Views
2K
Papabravo
A
  • Question
A couple resistor and transistor questions
2
Replies
39
Views
6K
ZipZapOuch
A
  • Question
Need help identifying this burnt out resistor
Replies
8
Views
2K
danadak
J
  • Question
Possible Resistor identification
Replies
2
Views
790
jasonb22
J
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…