Hi!
I have a 5-10 year-old Seymour Duncan SA-2 Perfect Timbre pickup/preamp in my guitar. When I purchased this guitar (used) a couple years ago, it worked *great*! After a year-long guitar-playing hiatus, I plugged my guitar into my amp, and it now has a fairly loud 60Hz hum. I can hear the guitar if I turn it up enough, but the hum is bad enough that it is unusable for performing. It hums with all amps and all cords I've tried, so I'm reasonably sure it's the SA-2 preamp in the guitar.
I'm an electrical engineer, so given time, I should be able to find and fix the problem, but before I start drawing out the schematics, I thought I would ask if Seymour Duncan (or anyone else) has schematics available for this pre-amp? Or if not, does anyone know which caps (I'm assuming it is a bad cap or two) are likely to have failed, causing my new hum?
(This is my first post, so if I'm violating any rules by asking for schematics,
please let me know, and I'll rescind my question.)
Thanks for any help!
Regards,
Andy
I have a 5-10 year-old Seymour Duncan SA-2 Perfect Timbre pickup/preamp in my guitar. When I purchased this guitar (used) a couple years ago, it worked *great*! After a year-long guitar-playing hiatus, I plugged my guitar into my amp, and it now has a fairly loud 60Hz hum. I can hear the guitar if I turn it up enough, but the hum is bad enough that it is unusable for performing. It hums with all amps and all cords I've tried, so I'm reasonably sure it's the SA-2 preamp in the guitar.
I'm an electrical engineer, so given time, I should be able to find and fix the problem, but before I start drawing out the schematics, I thought I would ask if Seymour Duncan (or anyone else) has schematics available for this pre-amp? Or if not, does anyone know which caps (I'm assuming it is a bad cap or two) are likely to have failed, causing my new hum?
(This is my first post, so if I'm violating any rules by asking for schematics,
please let me know, and I'll rescind my question.)
Thanks for any help!
Regards,
Andy
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