I have two electric guitars, a 1983 Gibson SG, and a 2001 Gibson Les Paul... I bought the SG used in late 2001, it still has the same pickups in it as when I bought it - I have no idea if they're original or not. The LP also bought used, in 2012, and I immediately put new DiMarzio pups in it.
Two weeks ago I noticed the SG was a extra squeally, and sure enough, the bridge pickup is microphonic (I didn't test the neck). Last night, between songs at band practice, I tapped the LP with my pick and heard it through the amp. Tested both bridge and neck pickups, and they're both microphonic. What the heck?
What are the odds that 4 year old pickups, and at least 15 year old pickups would go microphonic within the same two-week period? What could I be doing to facilitate that? Could it be the weather? Philly summers are hot and humid, this one especially so.
And does repotting them generally help?