Converting 2 prong to 3 prong grounded plug
Typical Fender style
WARNING! Always insure the following steps are taken BEFORE working inside
any amplifier.
1. Unplug or make sure the amp is unplugged from wall AC.
2. Turn on the power and Stand-By switches.
3. Connect a jumper wire from chassis ground to pin 1 or pin 6 of any preamp
tube. We recommend the first tube (12AX7 or 7025 on the far end).
4. Allow stored electricity to drain for a few minutes.
5. If in doubt, refer service to a competent technician.
Follow the diagrams below and you’ll find this task to be very easy.
BLACK WIRES to TRANSFORMER
BEFORE
FUSE HOLDER
WHITE WIRE
AC
SW
GRND Sw
BLACK WIRE
BLACK WIRES to TRANSFORMER
AFTER
FUSE HOLDER
WHITE WIRE
GRND Sw
AC
SW
BLACK WIRE
GREEN WIRE – MOUNT TO CHASSIS GROUND.
USING AN EYELET IT IS BEST TO MOUNT TO
POWER TRANSFORMER MOUNTING BOLT/NUT.
TUBE AMPS 101
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