Bright Switch Lecture - Egnater Amp Building Seminar Joe CoffeyApril 14, 2008VideoOkay DIY'ers, here's your Bright Switch 101 from Bruce Egnater. ? Bonus: how to use the circuit in reverse on your guitar. Okay DIY'ers, here's your Bright Switch 101 from Bruce Egnater. ? Bonus: how to use the circuit in reverse on your guitar. gear-historyegnatergearvideosamp-diyampshow-toswhats-newDIYAmpsGearVideosReviewsDIYAmp DIY