Kirk Wallace wrote: > I have a ten-turn eight Watt Spectrol/Vishay potentiometer. > > http://www.vishay.com/doc?57093 > > I was having trouble getting sensible voltage readings through it, so I > took it apart. It looks like it may not be made to be taken apart. The > solder posts are mounted with a screws. The end of the screws have a > short less than hair thin wire on it. I suppose I broke the wire when I > loosened the screw? Has any one worked on these and have advise on how > to repair them. Newark has them for $80 each so I'd like to fix the one > I broke. >
Ughhh! Best advice is to not take these apart unless they are clearly broken, as told by an Ohmmeter. The hair-thin resistance wire is usually wound on a helix of heavy copper magnet wire, and the wiper rides the helix. You may find the resistance wire hard to solder to. Also, the wiper may be damaged, either not properly riding the resistance wire or not properly making contact with the center shaft, which then has to make contact with the "wiper" terminal. So, you have a series chain of 3 sliding contacts that all have to work properly for the pot to work. If you don't need 8 WATTS (Is it really that much?) you might be able to find a surplus replacement for less. What is the resistance reading for it? I have a few 10 turn pots here, but I doubt any of them are good for more than 2 W. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
