I started shielding two strats equipped with Texas Specials a couple of months ago, but then got busy and never finished them. I finally did so yesterday, and it appears that I got rid of some hum, although it is by no means silent. Using some insight from jjasilli as well as the guitarnuts web site, I shielded the cavity with conductive copper tape, and basically have all the signal grounds tied to the ground lug of the volume pot, which is then connected with a single conductor shielded wire to the ground lug of the output jack. I have the bridge assembly grounded to the body of the volume pot. I then connect the body of the volume pot to the ground lug of the output jack using the shield of the aforementioned signal ground wire. Thus, I have the chassis ground and signal grounds tied together at the output jack (at some point they have to be connected, I presume).
I also have a shielded wire running from the middle lug of the volume pot to the hot lug of the output jack. The shield is grounded at the output jack, but then cut off and left unconnected at the volume pot end.
1) Although I appear to have eliminated some hum, it is certainly far from silent. I am assuming it's is not possible to get it completely silent with the Texas Special pickups. I still have an annoying buzz which goes away only when I touch the bridge or output jack with my hand (both of which are at chassis ground). Is this buzz a problem that can be eliminated, or is this to be expected even after proper shielding has been done?
2) On my one strat, positions 2 and 4 have no hum, which is what one would expect (it still has the buzz issue, though). On my other strat, however, which is wired identically and also with Texas Specials, only position 4 (neck and bridge) eliminates hum. To me, that means both the neck and middle pickups are ok. I am wondering if perhaps the bridge pickup was done incorrectly when manufactured, but I am not sure exactly how to check and/or fix this. Is it just a matter of reversing the wires, or is there an inherent flaw with the way the magnets were oriented, or possibly something else?