HIGH VOLTAGE SILICON RECTIFIER R3000, 3000V/200mA. DC, DO-15. Mainly used as suppressor diode for overvoltage on high voltage tube circuits.
Used in many Fender amps: Blues Deluxe (CR24, CR25) Blues De Ville, Blues DeVille 212 (CR24, CR25) Blues Deluxe Reissue (D4, D5) Hot Rod Deluxe (all versions) (CR4, CR5) Hot Rod DeVille (all versions) Custom Vibrolux Reverb (CR6, CR7) Vibroking (CR6, CR7) Dual Professional (D301, D302)
Datasheet