Soledad Posted January 24, 2023 Share Posted January 24, 2023 Having a run around with this. I have a '98 US built Precision Special (a P/J as it's known). The original tone pot is duff, signal drops, earth buzz etc. Ordered what I thought was right from Northwest, but it was just a standard size version which won't fit cavity (tone pot occupies space originally made for the jack on a std Precision so needs to be smaller size than standard). So I'm looking for a source of a decent quality mini pot (250k I believe) with the solid 1/4" shaft (to take std Precision knob). I sent wrong one back to Northwest but they have now shipped a split shaft pot... utterly useless. Anyone know where I can get a decent quality replacement for the tone pot - can't be so hard as Mexico make P/Js these days I believe, not like it's that rare. Help appreciated. Quote Link to comment Share on other sites More sharing options...
PaulThePlug Posted January 24, 2023 Share Posted January 24, 2023 Drop @KiOgon a message... He makes looms with various sizes and styles of pots, he might have what you are after... 2 Quote Link to comment Share on other sites More sharing options...
PaulThePlug Posted January 24, 2023 Share Posted January 24, 2023 Or... just use the split shaft, but align the knob so the grub screw goes in to the shaft gap to force apart for grip, rather than on the splined halfs, squashing the gap... 1 Quote Link to comment Share on other sites More sharing options...
Soledad Posted January 24, 2023 Author Share Posted January 24, 2023 1 minute ago, PaulThePlug said: Or... just use the split shaft, but align the knob so the grub screw goes in to the shaft gap to force apart for grip, rather than on the splined halfs, squashing the gap... I tried using those before (on KiOgon's Jazz harness a while back), wasn't happy as the knob becomes eccentric and it made my head hurt!! (OCD-ish). I'll ask KiOgon. Thanks for tips. Quote Link to comment Share on other sites More sharing options...
rushbo Posted January 24, 2023 Share Posted January 24, 2023 40 minutes ago, PaulThePlug said: Or... just use the split shaft, but align the knob so the grub screw goes in to the shaft gap to force apart for grip, rather than on the splined halfs, squashing the gap... (Thread Hijack) I had to re-read that sentence 4 times. On reads 1-3, it made absolutely no sense at all and just looked like insane gibberish. However, on the final read, the penny dropped and I became enlightened. Not only do I now know why there's a difference between a splined and a solid shaft, I've also got a very useful life hack for bass guitar maintenance. Thank you Mr. ThePlug. That is probably going to be the highlight of my day. 1 1 Quote Link to comment Share on other sites More sharing options...
KiOgon Posted January 24, 2023 Share Posted January 24, 2023 1 hour ago, Soledad said: I tried using those before (on KiOgon's Jazz harness a while back), wasn't happy as the knob becomes eccentric and it made my head hurt!! (OCD-ish). I'll ask KiOgon. Thanks for tips. If you use the wrong knobs, for 1/4" shafts - yes they will go eccentric - but if you use the proper knobs for 6mm shafts the alignment of the screw with the split makes them fit concentric and tight. 2 Quote Link to comment Share on other sites More sharing options...
Soledad Posted January 24, 2023 Author Share Posted January 24, 2023 2 hours ago, KiOgon said: If you use the wrong knobs, for 1/4" shafts - yes they will go eccentric - but if you use the proper knobs for 6mm shafts the alignment of the screw with the split makes them fit concentric and tight. OK, on my Precision I will keep the original knobs and want a straight replace new with old. So I need a mini 250k with 1/4" solid shaft. Seems Northwest list said item, may have just sent the wrong one (split shaft). Also theirs is like £2.50 which makes me suspicious of quality. Do you have any mini solid 1/4"? Quote Link to comment Share on other sites More sharing options...
PaulThePlug Posted January 24, 2023 Share Posted January 24, 2023 Not sure on the 6mm v 1/4 but... Its usually that 1/4 are too big for 6mm knobs. Tother way is minimal... Alpha's are OK. https://www.ebay.co.uk/itm/373642673125?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=009VOmD9RYS&sssrc=2349624&ssuid=daj_hJ6fSo-&var=&widget_ver=artemis&media=COPY Or Bourns... https://www.ebay.co.uk/itm/124271828899?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=tvXEVDI3RHm&sssrc=2349624&ssuid=daj_hJ6fSo-&var=&widget_ver=artemis&media=COPY A Log or B Lin... 1 Quote Link to comment Share on other sites More sharing options...
Soledad Posted January 25, 2023 Author Share Posted January 25, 2023 Thanks Paul. Never thought to look on Ebay. Funny it's Northwest listing the Alpha one. Just ordered one 👍 1 Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted January 25, 2023 Share Posted January 25, 2023 Tayda do a full range of Alpha Pots https://www.taydaelectronics.com/catalogsearch/result/?q=250K+Potentiometer Sadly, the postage costs now are prohibitive. Quote Link to comment Share on other sites More sharing options...
gjones Posted January 25, 2023 Share Posted January 25, 2023 It might be an idea to use a normal size pot and drill a hole to increase the size of the control cavity. Quote Link to comment Share on other sites More sharing options...
Jabba_the_gut Posted January 26, 2023 Share Posted January 26, 2023 You can also get a ring that fits over splined shafts and increases the diameter to that of solid shafts. Quite handy if you are trying to change knobs but don’t want to change electrics. Might work in this case. https://www.guitarpusher.com/products/wd-potentiometer-adapter-sleeve Quote Link to comment Share on other sites More sharing options...
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