I've been working to rebuild this fisher KX100 that I purchased off of ebay last fall. So far I've replaced all of the older signal caps with new orange drops, upgraded the coupling caps with Russian PIO's, rebuilt the ceramic "Printed Circuit" RIAA networks and tone circuits with ones I built with discrete components, and replaced the rectifier diodes with HEXFREDS, but now I've run into a snag. The unobtanium 500K stereo volume pot/power switch combination is shot, and tracking worse the more I use it. The left channel is extremely faint, and does not track evenly with the right, suddenly becoming louder than the right when turned past 12 o'clock. This channel imbalance makes it impossible to use the phono preamp due to having to turn the right channel up to the point of feedback. Has anyone else here had a similar issue with a fisher volume pot and found any way to rebuild it, or know of a currently produced pot that would have the correct shaft to fit the original fisher knob? Having a power switch is not an issue, as i can install one somewhere else on the chassis. Any help would be greatly appreciated.
You might be able to get Mouser P/N 313-1240F-500K to work. Is it a .25 inch D shaft on the Fisher knob? I think my X-101-B is.
Its got kind of a low power rating. Not that you would be putting much power into it, but you might want to get your calculator out just to be sure it will work.
SpreadSpectrum said:
It's a D shaft. That should work. In the future, would it be possible to rebuild the original pot?
I've always wondered the same thing as I have an old Fisher as well. Some of the pots are quite unique like the bass and treble pots with concentric knobs for individual adjustments of channels. I've never seen anything like it new.
My guess is that it would be pretty expensive if it were possible, but I've never heard of anyone who does that.
Maybe some of the old timers here know of something.
My guess is that it would be pretty expensive if it were possible, but I've never heard of anyone who does that.
Maybe some of the old timers here know of something.
SpreadSpectrum said:
The only thing i could think of is cannibalizing pots with similar wipers and contacts, and using them to rebuild it.
Hey All.
A blast from the past. I have the same problem with an X-1000 did you find something that would work? On the X-1000 its a 100k with a switch.
A blast from the past. I have the same problem with an X-1000 did you find something that would work? On the X-1000 its a 100k with a switch.
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Sourcing an exact replacement is almost impossible.
Install a slide or rocker switch in place of a back panel convenience outlet. Now, you have a fighting chance at replacing the control function. If the control is associated with a loudness contour feature, you may be able to find a Noble conductive plastic part that will work. If you are dealing with "simple" ganged stereo controls of either linear or log. taper, the Alpha Taiwan stuff Mouser stocks should be suitable.
Install a slide or rocker switch in place of a back panel convenience outlet. Now, you have a fighting chance at replacing the control function. If the control is associated with a loudness contour feature, you may be able to find a Noble conductive plastic part that will work. If you are dealing with "simple" ganged stereo controls of either linear or log. taper, the Alpha Taiwan stuff Mouser stocks should be suitable.
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