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Old 03-23-2013, 07:52 PM   #1
thestormunfolds
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What I'm hoping is a simple problem

Hey,

Bought a cheap Telecaster copy and have pretty much changed everything on it, fitted some Bareknuckle Piledrivers, 4 way switching with phase switching on a push pull switch. The problem is the guitar (although all connections and wiring have been checked) hasn't grounded properly. There's hum/noise unless I touch the strings of the guitar, anyone know why and how to sort this?

Everything is grounded at the back of the push pull volume pot.

Thanks
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Old 03-23-2013, 08:33 PM   #2
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thatll happen

you should worry when it gets louder when you touch it


also is your control cavity sheilded?
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Old 03-23-2013, 08:41 PM   #3
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are the pots grounded to the bridge?
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Old 03-23-2013, 08:42 PM   #4
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Originally Posted by Robbgnarly
are the pots grounded to the bridge?

This
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Old 03-23-2013, 08:44 PM   #5
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Quote:
Originally Posted by thestormunfolds
There's hum/noise unless I touch the strings of the guitar

That's normal, you're always touching something metal (strings, knobs, bridge, tuners) when playing so it shouldn't be that big of an issue.
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Old 03-23-2013, 08:45 PM   #6
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No, there was a bridge wire in this body when I bought it that led to the tone pot which I was told I didn't need as my pickups are individually grounded. The first body I had did not have the wire and was fine. Guessing that's the problem then?
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Old 03-23-2013, 08:46 PM   #7
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Originally Posted by jthm_guitarist
That's normal, you're always touching something metal (strings, knobs, bridge, tuners) when playing so it shouldn't be that big of an issue.


It only reduces the noise and it's never happened on any of my other guitars, this one however is needed in studio situations so it needs to be as quiet as possible
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Old 03-23-2013, 08:47 PM   #8
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Quote:
Originally Posted by thestormunfolds
No, there was a bridge wire in this body when I bought it that led to the tone pot which I was told I didn't need as my pickups are individually grounded. The first body I had did not have the wire and was fine. Guessing that's the problem then?

Yeah you have to have a ground going to the bridge unless you have active pickups they are the only exception to the rule.
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Old 03-23-2013, 08:48 PM   #9
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Quote:
Originally Posted by jthm_guitarist
That's normal, you're always touching something metal (strings, knobs, bridge, tuners) when playing so it shouldn't be that big of an issue.

WTF don't give advise when you have no clue of what could be the problem
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Old 03-23-2013, 08:50 PM   #10
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Originally Posted by Robbgnarly
Yeah you have to have a ground going to the bridge unless you have active pickups they are the only exception to the rule.


Alright I'll put a wire back in tomorrow (it's almost 1am here, don't want noise complaints for my guitar again! haha) and see if that works, weird how the other one was fine though without one.
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Old 03-23-2013, 08:59 PM   #11
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As an EE I think I might have some sort of clue as to what the problem could be, and your suggestion of grounding the bridge isn't going to help. He said when he touches the strings the buzz stops, so that means they (and therefore the bridge) are already grounded.

Single coil pickups are just antennas that pick up noise, assuming that the wiring is correct there's not much you can reasonably do except try shielding the cavities (as suggested already above.) It's time consuming and your results may vary.

http://www.guitarnuts.com/wiring/shielding/tele.php
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Old 03-23-2013, 09:01 PM   #12
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Quote:
Originally Posted by jthm_guitarist
As an EE I think I might have some sort of clue as to what the problem could be, and your suggestion of grounding the bridge isn't going to help. He said when he touches the strings the buzz stops, so that means they (and therefore the bridge) are already grounded.

Single coil pickups are just antennas that pick up noise, assuming that the wiring is correct there's not much you can reasonably do except try shielding the cavities (as suggested already above.) It's time consuming and your results may vary.

http://www.guitarnuts.com/wiring/shielding/tele.php

You are a moron, if you think that a bridge left un grounded with passive pickups is OK.
And If your an EE then I would never hire you for anything, if I obviously know more about this and I am self taught
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Old 03-23-2013, 09:34 PM   #13
thestormunfolds
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Quote:
Originally Posted by jthm_guitarist
As an EE I think I might have some sort of clue as to what the problem could be, and your suggestion of grounding the bridge isn't going to help. He said when he touches the strings the buzz stops, so that means they (and therefore the bridge) are already grounded.

Single coil pickups are just antennas that pick up noise, assuming that the wiring is correct there's not much you can reasonably do except try shielding the cavities (as suggested already above.) It's time consuming and your results may vary.

http://www.guitarnuts.com/wiring/shielding/tele.php


Not trying to doubt your knowledge or anything but there is no way that this is just normal pickup noise, for a start like I said I'm using Bareknuckle, top quality pickups. They are also phase cancelling when used together, the normal single coil hum disappears when I activate this pickup selection but the other noise remains. If the noise stops when I touch the strings then that would indicate that I am grounding the guitar myself?
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Old 03-23-2013, 09:52 PM   #14
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Quote:
Originally Posted by Robbgnarly
You are a moron, if you think that a bridge left un grounded with passive pickups is OK.
And If your an EE then I would never hire you for anything, if I obviously know more about this and I am self taught


He never said it was ok to have that. He said he thinks it is already grounded.
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Old 03-23-2013, 09:58 PM   #15
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Quote:
Originally Posted by kingneptune117
He never said it was ok to have that. He said he thinks it is already grounded.

No he did not, he said "the sugestion of grounding the bridge is not going to help"

Kinda easy to understand I think
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Old 03-23-2013, 10:47 PM   #16
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Yeah. Grounding the bridge isn't going to help if it is already grounded.

Kinda easy to understand I think
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Old 03-24-2013, 08:49 AM   #17
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Quote:
Originally Posted by kingneptune117
Yeah. Grounding the bridge isn't going to help if it is already grounded.

Kinda easy to understand I think

The bridge was not grounded.

The TS stated that already before the first post of our "EE" chimed in with his extensive knowledge. A bridge must be properly grounded to the circut to remove the hum. That is why it stops when TS touches the strings, he becomes the ground of the circut. Active pickups are the only pickups that do not need to be grounded to the bridge.

Some times the "knowledge" that is share by people on here is remarkable

Yes I will give him the benifit-of-doubt that some guitars do need to have the cavitys shealded, but when the ground is missing, that is the #1 culprit for the noise
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Old 03-24-2013, 01:45 PM   #18
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Alright guys an update!

Turns out that wiring this guitar has ran me out of wire but I thought'd I'd open it up and see if I could use a screwdriver to ground the bridge to the tone pot... Well, before I even did that it turns out that when the tone pot is in the fully off position the noise disappears however when the tone pot is turned on the noise comes up with it! If I touch any metal part on the guitar be it the strings, screws etc the noise stops. It is definite that I am grounding the guitar myself. What I don't understand is all points are grounded to the same point, apart from the tone cap, which is grounded on the tone pot itself. Even without the wire grounding the bridge the tone pot is controlling the volume of the noise.

These are not noisy pickups, and it is not an interference type noise, any ideas now?
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Old 03-24-2013, 01:52 PM   #19
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Quote:
Originally Posted by thestormunfolds
Alright guys an update!

Turns out that wiring this guitar has ran me out of wire but I thought'd I'd open it up and see if I could use a screwdriver to ground the bridge to the tone pot... Well, before I even did that it turns out that when the tone pot is in the fully off position the noise disappears however when the tone pot is turned on the noise comes up with it! If I touch any metal part on the guitar be it the strings, screws etc the noise stops. It is definite that I am grounding the guitar myself. What I don't understand is all points are grounded to the same point, apart from the tone cap, which is grounded on the tone pot itself. Even without the wire grounding the bridge the tone pot is controlling the volume of the noise.

These are not noisy pickups, and it is not an interference type noise, any ideas now?


Also the guitar is extremely quiet on clean sounds
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Old 03-24-2013, 01:55 PM   #20
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Quote:
Originally Posted by thestormunfolds
Alright guys an update!

Turns out that wiring this guitar has ran me out of wire but I thought'd I'd open it up and see if I could use a screwdriver to ground the bridge to the tone pot... Well, before I even did that it turns out that when the tone pot is in the fully off position the noise disappears however when the tone pot is turned on the noise comes up with it! If I touch any metal part on the guitar be it the strings, screws etc the noise stops. It is definite that I am grounding the guitar myself. What I don't understand is all points are grounded to the same point, apart from the tone cap, which is grounded on the tone pot itself. Even without the wire grounding the bridge the tone pot is controlling the volume of the noise.

These are not noisy pickups, and it is not an interference type noise, any ideas now?


is the tone knob grounded?

or the noise could be of the higher frequencies and the toned down so to speak

try grounding the bridge and then sheilding the cavity with some sheilding tape or similar product becasue its also possible that is the wiring is actigin as a sort of anteanea

anyway i wish you luck on your hunt for the noise maker


edit:if its quiet on clean sounds it could be something else not your guitar thats making the noise
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Last edited by supersac : 03-24-2013 at 01:56 PM.
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