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Post subject: Volume and tone knobs don't fit.
Posted: Sun Mar 02, 2014 8:11 pm
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Just installed a set of EMG SA pickups that came with new split shaft pots. The existing knobs will not fit on the shafts, the diameter of the shaft is larger than the hole in the knobs. Do they make a special size for EMG pots? Or should I just push them on? I don't want to mess up the knobs.


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Post subject: Re: Volume and tone knobs don't fit.
Posted: Sun Mar 02, 2014 8:19 pm
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Seanboy wrote:
Just installed a set of EMG SA pickups that came with new split shaft pots. The existing knobs will not fit on the shafts, the diameter of the shaft is larger than the hole in the knobs. Do they make a special size for EMG pots? Or should I just push them on? I don't want to mess up the knobs.



What did you install them on there is a metric and american sized knob, sometimes I sort of open my knob hole up a bit reaming it with a screwdriver like a cabinet screwdriver.

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Post subject: Re: Volume and tone knobs don't fit.
Posted: Sun Mar 02, 2014 8:21 pm
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Installed them on a MIM Strat.


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Post subject: Re: Volume and tone knobs don't fit.
Posted: Sun Mar 02, 2014 8:33 pm
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Seanboy wrote:
Installed them on a MIM Strat.



Well I have never had an issue there so you can ream the hole in your knob a tad and then hit it with a blow dryer this will soften it. should go on fine.

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Post subject: Re: Volume and tone knobs don't fit.
Posted: Sun Mar 02, 2014 8:35 pm
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Thanks, I'll give that a try.


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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 3:11 am
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You need to buy some american knob .

This advise by donnycraven won't work IMO ; You'll scrap your knobs

"Well I have never had an issue there so you can ream the hole in your knob a tad and then hit it with a blow dryer this will soften it. should go on fine."


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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 4:19 am
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They use the same knobs on mexican strats as american ones

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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 4:28 am
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donnycraven wrote:
They use the same knobs on mexican strats as american ones


Any MIM year ?

Why knobs don't fit on EMG pots ? These are not American made anymore ?


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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 4:39 am
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stratele52 wrote:
donnycraven wrote:
They use the same knobs on mexican strats as american ones


Any MIM year ?

Why knobs don't fit on EMG pots ? These are not American made anymore ?



Fender has used CTS pots on the mexicans for years and the same knobs, you should probably read the advice and learn it if your going to claim to be a guitar tech. its a 3/16 cabinet screwdriver it will lightly ream the knob hole and a hairdryer will slightly heat and soften the plastic. More often its simply the pot shaft.

You have disputed my advice many times only for the poster to comeback and say it worked, imagine that? I actually do the things I tell people about on a daily basis now Im not saying you dont. Maybe its your language barrier I dont know.

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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 4:42 am
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I know what you speak of I mentioned it too but asian guitars use metric knobs.

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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 5:00 am
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donnycraven wrote:


You have disputed my advice many times only for the poster to comeback and say it worked,
sorry , but I don't remember that, any link

imagine that? I actually do the things I tell people about on a daily basis now Im not saying you dont. Maybe its your language barrier I dont know.


To mee using a hair dryer to melt the knob hole is not warm enough or if it is is like to play lotto .You can scrap the knobs .

I may work well if you said .

My home hair dryer can't heat enough for this job .


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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 5:36 am
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Your only warming the knob not melting it.

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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 6:38 am
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Gents, there's a bit of clarification needed here for Seanboy, who may not be familiar with the ins and outs (pun intended) of potentiometer shafts.

This issue has nothing to do with where guitars are made. There are many brands of potentiometer, two of which are particularly widely used for electric guitars. They are Alpha and CTS.

The Alpha pots that are usually put into guitars have a split shaft with 18 vertical splines (ridges) on it. The shaft is 6mm / 0.236" in diameter.

CTS use two different sized shafts, both of which are found in Fender guitars. Their split shaft pot is mostly found in Strats; it has 24 splines and a diameter of 5.95 mm / 0.235".

CTS also do a solid shaft pot: it has smooth sides and a diameter of 6.35 mm / 1/4".

Fender generally use CTS pots; I'm guessing this EMG harness probably has Alphas. An EMG-DG harness I once bought definitely did have Alpha pots. Nuttin' wrong with 'em.

From the above you will see that Alpha and CTS knurled split shaft pots are virtually the same diameter and Fender Strat type plastic knobs will fit on either. However, if the knobs were previously used on CTS pots they will take a bit of a push to install them on Alpha pots, as there is a different number of knurled splines and they won't quite fit the grooves previous made in the knobs' holes. Alpha pots are sometimes referred to has having "course knurled shafts", CTS as "fine knurled shafts", because of the number of those ridges.

Generally a moderate push is all that's needed to switch knobs from one make of pot to the other, but occasionally doing so chews up the inside of the hole a bit and makes it loose on the shaft. Then you need a new knob.

The only problem will be if Seanboy's EMG harness came with CTS solid shaft pots, because they are enough bigger that you can't get Strat knobs onto them. (They are intended for the type of Tele and Les Paul knobs that have a little screw on the side to secure them.) I'll be happy to hear I'm wrong, but I don't recall seeing Strat type knobs for sale that will fit solid pot shafts. If someone knows different, please tell us! :)

Seanboy, if you have solid shafts on those pots you are either going to have to swap them for your previous, split and knurled pots, or maybe settle for non-Strat style knobs.

Cheers - C

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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 6:52 am
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EMG pots do not look any pot I know and see like CTS , Alpha, Bourns .

EMS SA pickups use split shaft pots ; Which knob will fit ? American made only ?


Package includes:
EMG's exclusive Quik-Connect cable
Prewired split shaft volume/tone control set
Output jack
Battery clip set

seanboy is better to keep his original knob with his old pickups / pots set in case of resale them and buy a new set of knobs


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Post subject: Re: Volume and tone knobs don't fit.
Posted: Mon Mar 03, 2014 7:08 am
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stratele52 wrote:
EMG pots do not look any pot I know and see like CTS , Alpha, Bourns .

Hi statele52: as I mentioned, my EMG set came with Alpha mini-pots. So at least sometimes that is what EMG use. Whether that's what Seanboy has or not, we don't yet know.

Cheers - C

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