How to EASILY repair a snapped Amplifier POT shaft // NO SOLDERING REQUIRED!
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- čas přidán 11. 07. 2024
- How to fix a guitar amplifier pot shaft that is snapped off without having to drop the chassis, purchase anew pot's or do any soldering!
This will eventually happen to you... amp falls over, it gets knocked... guitar hits it... SNAP one of the controls breaks off!
Just some simple tools required:
Dremel with cut of wheel (hack saw will work as well)
- drill bits
- drill
- 4 x 40 tap
- 4 x 40 x 1/" machine screws
- ~3/8" to 1/4" aluminum round bar
- red lock-tite - Jak na to + styl
Glad I came to the same solution as you. Although i did it slightly differently as it was for a boss overdrive pedal. I dropped it and broke the split shafts. I could not find a replacement pot as they are tiny and quite specific. Cut it flat as you did and drilled a hole 1.5mm and then made an aluminium pole the right size to fit inside the knob with a 1.5mm hole in the centre. Glued it together with a piece of 1.5mm copper wire to join the two pieces together. works great and you'd never know it was broken.
Thank you very much !!
Very straightforward process. I'll try it.
genius, reminds me of a dental implant. well done!
Yes, something like that! Cheers.
Hi Mike
I had this amp, it was my first one. Nice sound, incredible chords.
It was a present for my 18th birthday from my brother in law.
It was nice seeing one again, thank you.
By the way, it was heavily used and abused, but the pots never broke. Thinking back, the plug of the footswitch cord broke (all those pins...) and I had to replace it.
Have a nice day.
Andrea
This is very helpful. Thank you.
You’re welcome!
hey mike! i have a better solution to help you! use a computer motherboard standoff for the bolt! its the exact thing u want without having to make a barrel to put on a screw. its one piece. look it up.. round computer motherboard stand off. its 4-40. thanks for your help! i just know computers and it blew my mind cause its the same size. take it to the next level! gonna make it way easier now. just tap it and put a standoff there. boom, done!
Great idea. This is what I had in my shop already so it worked for me and it was free. lol Your solution seems pretty convenient as well. Thanks for the feedback.
Thank you @thinkhendrix this saved me $10 just used some spare ones off my old pc !
@@michaelmoore1434 awesome!
Lmfao.. Thats EXACTLY what i thought of to use for it too!! Hahahahaha.. its perfect!.. well at least i hope lol... Fingers crossed lol
Hi thanks for the video, can You get knobs to fit on on the motherboard stand offs ?
Awesome. Thanks for this great idea. Perfect solution!
hey mike! i have a better solution to help you! use a computer motherboard standoff for the bolt! its the exact thing u want without having to make a barrel to put on a screw. its one piece. look it up.. round computer motherboard stand off. its 4-40. thanks for your help! i just know computers and it blew my mind cause its the same size. take it to the next level! gonna make it way easier now. just tap it and put a standoff there. boom, done!
@@thinkhendrix Do you happen to have a link? I can't seem to find anything that matches. TIA
Very nice!
Thank you! Cheers!
Exact same amp, exact same issue.. I will likely use your solution, thank-you.
This is a great fix idea.
Thanks for the comment, yes, I’ve done this fix a few times. Seems to hold.
this is good for pots that are on vintage equipment that cant be found anywhere
This is awesome, you've got a new subscriber! I want to try this on my Peavey JSX head - but in my case, the pot stem is snapped down to almost nothing. Do you think I would still be able to drill it out deep enough to accomplish this?
Thanks for commenting. It’s hard to say how much additional room you have to play with. You have at least the threaded section the play with. What you could do is find a similar pot and take it apart. Cheers.
Dejar Mike, thanks for the great advice! I have dame problem but my broken potentiometer is obsoleted, no longer available, 11 detents, and besides that, It has a split knurled shaft. Any idea based on your experiencie? Kind regards from Mexico!
Thanks for reaching out. When it comes to fixing a split shaft you really only have 2 options. Replace the Pot or do my “fix” and install a knob that has a set screw or modify your knob to slide over my fixed shaft.
Thank you. I have a half broken shaft on a 1971 P bass. I don't want to replace a vintage pot. This should work nicely.
You're welcome, hope it works for you!
@@MikeFreda The only thing I don’t know how to do is turn down the aluminum round to the right diameter. If it requires an expensive tool I may just try to find one with a close enough diameter. Any suggestions?
Hello, one of my viewers stated that computer/electrical standoffs work as well (it's in the comment section) I think Home Depot sells them. If not, let me know I make/send you some 1/4 rod with a hole drilled out in the middle.
@@MikeFreda Awesome. Thanks
Ill let you know if I ever need any, but I think I’ll be okay with that suggestion
Hello Mike,
What are the chances of having one of those stems that you make sent out my way?
I have the same issue but not as intricate tools like you do. I can manage to tap out and sand what’s left of the existing stem that shouldn’t be a problem. My issue is with making the stem like you so cleverly did.
I can pay for the material, your time involved and shipping if it’s feasible, and if not it’s quite alright!
Thank you for the super informative video and for your time as well!
Be safe and well!
I think I may be able to help you out. Please PM / email me.
@@MikeFreda Hello again Mike, I really appreciate your message as well as your time my friend. I just never emailed nor private message anyone on You Tube before. How would I go about doing so?
Thank you kindly!
Peace!
moe.
For most of us we aren't going to be able to machine down the aluminum rod to make the replacement shaft section. I do a work around that may interest people which is to just purchase an aluminum spacer at the hardware store the same diameter as the shaft. You may have to cut or grind down the spacer to get the exact length. Just drill and tap the pot shaft and then fasten the spacer with the screw to it. I also use a little clear nail polish on the threads to keep it from coming loose.
Yes, that works well. A few others have left that same comment. Thanks for suggesting that, hopefully that will make it easier for some of you. Cheers.
For D shaped shafts, it's a bit more difficult too
Even simpler, use a hex standoff -- available in metric (M3) or inch (4-40) dimensions. A metric and inch standoffs are available from McMaster, or DK.
Yes, that is correct. That will work good as well. Many people have suggested that. I may do an update video explaining that option. Thanks for commenting. Cheers.
Hi mike ,,I have this same issue with my Behringer Acx 900,couldn’t find d right encoder switch and the technician used a different encoder switch which will not work.Now my Amp makes loud humming noise if I try to use the Fx /Effect switch.
How do I determine the right encoder switch that works for my model as the original one doesn’t carry any tag or number to help In sourcing replacement.
Just 5 pin .
That’s a shame. Unfortunately, I don’t know anything about those amps. I can’t really help you there. My recommendation is to contact Behringer and see if they stock replacement parts.
I accidentally knocked my son's pre knob off of his TNT115. I ordered one from Peavey. I soldered the new one on, now my High and Low inputs don't work. Plugged in his bass to the preamp and got some sound. DDT light doesn't work now either. Any clue as to what I did? Thanks!!
Thanks for your comment. Unfortunately, it could be a bunch it issues from the wrong value of the pot, got the pot hot when soldering, bad circuit trace, bad input Jack, something grounding out. Without having the amp in front of me… it’s all just speculation.
i dont have a lathe to make the barrel thing. Can you make me a couple of them. i have a valvestate 80v marshall with a few busted off
Hi, Please PM me and we can work something out. I've been told Home Depot has "Standoffs" that also work in this application. Cheers
can something else be used in place iof that thing you used at 4:00 ? I have everythi9ng except that crucial thing. .... Almost Hate to file off the tiny knub thats left on my brokeen treble pot. But if so what could I use in place of that tool?
Good day, at 4:00, that is a small tap handle. You need some way of holding the 4x40 tap. There are other tap handles available. Try Harbor Freight or Amazon. You could also use a set of small vise grips. A drill would be my last resort. You have to be careful not to break the tap. That would ruin your day.
@@MikeFreda what is the Tap?? I missed how you drilled it out. so youre saying..... there is a method other than drilling it? I was considering laying the amp back ..... mising up a tiny ampunt of Jb Weld & with a small point item...... put a tiny glob on it & let it harden, being sure to not put so much that it binds with the surrounding metal & wont turn. but enough to atleast use the finger tips to adjust it when needed.
A tap cuts threads so you can screw in a small machine bold. Yes, you have to drill it out the middle of the shaft. Other than removing the pot itself and installing a new one I’m not sure what else would work. Good luck.
I have an amp that pot has snapped. It is filled with metal however, its the treble knob on yamaha amplifier. I need to drill it first then yes?
In order to tap a thread or reuse the knob, you will need to drill it out as per the video. Cheers.
@@MikeFreda its the middle part that moves then as ive tried to turn it and no joy. I will drill it and go from there. Im sure it will work if i can turn it. Its a good oldschool amp but treble pot has snapped thats all. Mine however is slightly different its within a hole the knobs come out an inch so slightly abit more challenging.
So where do you get the part to repair the pot? The threaded shaft? No PN
Ok. I see in one of your other replies that you rigged it. It's not an over the counter part. Yeah I can do that with standoff and a screw that is flat head.
No, I made the part from scratch but I’ve been told stand offs work as well. You can get them at homedepot. The trick is to find the right thread pitch for the tap. Cheers.
@@MikeFreda Thanks. I'm pretty handy at fixing things. The bigger trick will be to find a matching knob (for a Digitech RP-500 I bought used). Worst case I will just replace all 6 of the knobs with similar ones.
I had the same model about 20 years ago and half of the pots broke at some stage.
Easy, if you have the tools you used
True. I’ve been made aware that HomeDepot sells threaded stand offs in the hardware dept. You just need the corresponding drill and tap for that thread pitch. Cheers.
Hello again Mike,
I believe I found your email and I've sent a message your way...
Hopefully it was the correct address....
Thank you kindly!
an artisan
you can build amps huh...interesting
I’m sure ‘re-shaft my pot’ is a euphemism…