hello...
im using strat

my question...
in neck/middle/bridge potition heared noise...
but in neck-middle/middle-bridge postition sound is good..

anyone can help me...thank you

First, welcome to the forum. The noise in the neck, middle, and bridge positions is normal. The other two positions are quiet because the middle pickup is reverse wound.If your playing near your computer and or fluorescent lights the hum is more pronounced. Just the nature of the beast. Hope this helps........... Mike

_________________
The blues ain't nothin but a good man feelin bad.

Every strat has that. I believe it's called a sixty-cycle hum, and it's something you get with single-coil pickups. You can do something called shielding (http://www.artandtechnology.com.au/guitar/shielding-strat.html) to eliminate this.

Could be a dirty switch .
Get some "canned air " and give it a blast . Maybe even give it a shot of De-tox,an electrical componants cleaner !