Zero Hum Strat Coil Nov 13, 2006 7:20:12 GMT -5
Post by woody on Nov 13, 2006 7:20:12 GMT -5
I just moded a Chinese Strat copy and it has been converted from something that sounded like a buss saw to a nice sounding unit. First I pulled it apart and glued a layer of Aluminium foil to the back of the pick guard and connected it to the small foil that the switch and pots connect to. I used conductive Silver glue to make the connection. I also star wired the Earth returns to the volume pot. The biggest improvement came when I sheilded the 3 single coil pick-ups, most people will say that if you try and sheild these that you lose the high end treble and the output drops and it sounds muddy. Ahh but there is a way to do it and it makes these coils nearly as quit as a humbucker. You need to get woven Copper conductive fabric and "partially" wrap the pick-up coil. I solder a small wire from the earth connection on the pick-up body and cut the fabric so that it wraps around 95% of the coil. I connect the small wire to the fabric with the Silver loaded glue and with contact adhesive wrap and stick the length of fabric to the coil winding. Make sure it does not make a full turn but only 95% of a turn (the start and finish should not touch or overlap) I do electronic design for a business and just put theory to the test and it works fine. If you wrap plain copper around a coil it acts like a shorted turn if it goes all the way around in a complete loop, this acts as a transformer and the shorted winding kills the coil output. The fabric I use has 70 threads per inch and this stops the formation of cross sectional Eddy currents that muddy the sound. The Currents cannot exist on the fine threads. If you want to try this and do not have a clue to what I am on about I will put up some pics if it is requested. Another trick when trying to eliminate hum is to work on the Guitar while its plugged into the amp, then as you try different grounds/sheilds or wiring layouts you can easilly hear if they make a difference.