I posted this on the layout page, but I figured I'd put it here, too, just in case this is an obvious problem for someone who's had something similar before.
None of my builds are going right lately. Finished the BJFE Honey Bee, it sounds really nice at low gain. When I turn the Drive knob above noon, there's a high pitch squeal that increases in pitch as I turn the drive knob up more. Just wondering if anyone has experienced anything similar? Unfortunately I only have one 3130 on-hand. Tried a few 5457's with the same result.
Here's an audio clip:
http://goo.gl/jstB0d .. I've never experienced an issue like this so I don't even know where to start looking. Maybe I built a dog whistle on accident...