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Unread 03-17-2009, 12:33 PM   #1 (permalink)
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Shielding pickup cavities?

Well, I am trying to reduce as much noise as possible, mainly from feedbacking. I ordered an ISP Decimator, but I know if you turn them up too high they can squelch tone, so I need a few good ways to minimize feedback and hum. I heard shielding your pickup cavities was a helpful thing to do. Basically you just need to cover the wood with tin foil correctly? Anyone have pics of this done? Also are there any other good tricks in addition that can help minimizing internal noise?
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Unread 03-17-2009, 12:42 PM   #2 (permalink)
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Re: Shielding pickup cavities?

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Originally Posted by Sinmastah View Post
Well, I am trying to reduce as much noise as possible, mainly from feedbacking. I ordered an ISP Decimator, but I know if you turn them up too high they can squelch tone, so I need a few good ways to minimize feedback and hum. I heard shielding your pickup cavities was a helpful thing to do. Basically you just need to cover the wood with tin foil correctly? Anyone have pics of this done? Also are there any other good tricks in addition that can help minimizing internal noise?
grounding the tin foil is good idea...but you cant solder to the tin foil so you either need to use conductive glue or some sort of screw/washer/etc setup.

but i would reccomend tin foil over copper because its better at shielding, cheaper and bill lawrence likes it too.
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Unread 03-17-2009, 12:46 PM   #3 (permalink)
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Re: Shielding pickup cavities?

Well I was hoping that would just stick in there if it was tight enough, because that's what tinfoil does I thought.
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Unread 03-17-2009, 01:33 PM   #4 (permalink)
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Re: Shielding pickup cavities?

Does shielding with foil change your tone? I think I read somewhere (whatever THAT's worth...) that the foil acts as a capacitor and will cut some treble. Any truth to this?
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Unread 03-17-2009, 01:39 PM   #5 (permalink)
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Re: Shielding pickup cavities?

You can get shielding tape, such as this eBay.ie: COPPER FOIL SHIELDING TAPE FOR ELECTRIC GUITARS 6MM (item 360092894675 end time 26-Mar-09 17:12:32 GMT) you can get off british ebay. Just put it all over the cavities, including the back cavity to get the best performance
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Unread 03-17-2009, 03:10 PM   #6 (permalink)
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Re: Shielding pickup cavities?

I thought tinfoil would just stay in there w/o needed tape. Guess I could be wrong.
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Unread 03-17-2009, 04:31 PM   #7 (permalink)
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Re: Shielding pickup cavities?

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I thought tinfoil would just stay in there w/o needed tape. Guess I could be wrong.
I'd imagine you'd need some form of adhesive to make sure it stays in place. The link in my post is a shielded tape itself, might be worth investing in, I'm thinking of getting some for the Strat copy I'm doing up
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Unread 03-17-2009, 04:37 PM   #8 (permalink)
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Re: Shielding pickup cavities?

I might head down to the local hardware store and see if they have any. Basically all you do is just stick it the wood and cover it all up? Seems easy enough.
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Unread 03-17-2009, 04:49 PM   #9 (permalink)
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Re: Shielding pickup cavities?

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I might head down to the local hardware store and see if they have any. Basically all you do is just stick it the wood and cover it all up? Seems easy enough.
I think so, I know on a Strat you also place it under the pickguard so I'd assume on an SG you'd just need to cover the cavity. Hopefully someone here will know a little bit more
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Unread 03-17-2009, 04:51 PM   #10 (permalink)
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Re: Shielding pickup cavities?

Also why does this help? It seems like it shouldn't at all, but I don't know much about wiring.
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Unread 03-17-2009, 05:54 PM   #11 (permalink)
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Re: Shielding pickup cavities?

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Does shielding with foil change your tone? I think I read somewhere (whatever THAT's worth...) that the foil acts as a capacitor and will cut some treble. Any truth to this?
In short, this is correct. There's a reason why you don't see high-end LP guitars with shielding...it's an unnecessary mod that sucks tone. It's been debated on this forum plenty, but I'll stick with what Hillbilly has stated in more than one thread regarding the topic of shielding an LP/SG.

Reference: Gutted My Antique Ivory Custom

IMO, shielding is used on Strats because you're dealing with often-noisy single-coil pickups and the need for noise reduction far outweighs any loss of high-end (if any, I'm not sure if this is the case with a Strat). You already have humbuckers going, so I suggest looking elsewhere to reduce noise. LPs and Strats are very different animals and should be treated as such in regards to electronics.
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Unread 03-17-2009, 06:43 PM   #12 (permalink)
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Re: Shielding pickup cavities?

I've used copper foil shielding and not noticed any tone drainage.. I'll read hillbillys thread though, might learn something.

I get sheets of it from my supplier. adhesive backed.

There are two kinds of interference, RFI and EFI.. you should read up on this on the web and consider the pros and cons.

For me, I put it in, and ground it, and I like it just fine.

the tone argument carrys over to pickup covers as well.. and there's a difference there a lot of time.. metal that close to the coils is part of it, I think, because the sheilding
seems to have no tonal effect to my ears.

you need this more on single coils, as humbuckers do just what they say.. resist hum..
and metal covers sheild from outside sources of electronic irritation.

Feedback is another thing.

standing close to a loud amp.. just about anything will feedback..
single coils more notably.
semi hollows tend to vibrate a lot more and feedback easier, ie: casinos, dots, 335s etc.
microphonics are often a source. loose covers, screws or springs, anything near the pickup with can vibrate at volume can cause feedback.
cheaper made pickups will feedback.
too much gain causes feedback.

So I'd try to find out what the problem was for sure before doing anything.

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Unread 03-17-2009, 06:48 PM   #13 (permalink)
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Re: Shielding pickup cavities?

Quote:
Originally Posted by Christmas View Post
it's an unnecessary mod that sucks tone. It's been debated on this forum plenty.
Of course it's debated.... because everyone is an expert on electronics.
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Unread 03-17-2009, 06:56 PM   #14 (permalink)
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Re: Shielding pickup cavities?

I am thinking I should be fine without the shielding for now, that is what the Decimator is for. If I still have a problem I will consider it. Although feedback is still an issue, I'm not using cheap pickups, and I don't stand that close to the amp, but if I gotta change settings, I need to be closer. I heard stuffing the pickup cavity can help. Any truth to this?
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Unread 03-17-2009, 10:10 PM   #15 (permalink)
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Re: Shielding pickup cavities?

If you stuff the pickup cavity.. you might get some loose parts to stop shaking..
but that would be about it.

People used to stuff their semi hollows to stop feedback. But not solid bodys.
I don't know what your guitar is.
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Unread 03-17-2009, 10:24 PM   #16 (permalink)
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Re: Shielding pickup cavities?

Sg.
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Unread 03-17-2009, 11:51 PM   #17 (permalink)
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Re: Shielding pickup cavities?

Pics pleaseeeeeeeeeeeeeeeeeeeeeeee....
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Unread 03-18-2009, 12:04 AM   #18 (permalink)
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Re: Shielding pickup cavities?

Quote:
Originally Posted by TWANG View Post
If you stuff the pickup cavity.. you might get some loose parts to stop shaking..
but that would be about it.

People used to stuff their semi hollows to stop feedback. But not solid bodys.
I don't know what your guitar is.
TWANG
Confession: I stuffed my archtop....and I'll probably do the same thing to my solid bodies the next time a string change is in order.
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Unread 03-18-2009, 01:16 AM   #19 (permalink)
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Re: Shielding pickup cavities?

epiphone uses conductive paint...along with most guitar companies...whether the pickups are humbuckers or single coils...

if you are that worried about your tone...maybe you should join cork sniffers anonymous.

i wonder if playing naked affects your tone.

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Unread 03-18-2009, 07:10 AM   #20 (permalink)
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Re: Shielding pickup cavities?



My 04' Classic, no tone or high end loss to my ears.
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Unread 03-18-2009, 10:46 AM   #21 (permalink)
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Re: Shielding pickup cavities?

i just got a tone boner
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