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Technique
• IC Sockets
• Phone Plugs

Fender Vibro Champ® View
the
Repair
Shock Prevention

 

The AC wall plugs of vintage guitar amps are non-polarized.  That is, they can connect to wall sockets in two different ways by simply rotating the plug 180°.

NEMA connectors

This can create a shock hazard for the guitarist because one side of the socket carries the hot voltage and the other side is neutral.

Polarized AC Plug

Our iFAQ on Amplifier Shocks has details on why these shocks occur, what a 'death cap' is, and what ground switches do.

Polarized AC Plug

This repair story shows how to install a polarized wall plug on a Fender® Vibro Champ® guitar amp.

A polarized plug fits a polarized socket in just one way.  A wide prong fits the neutral slot and a narrow prong fits the hot.

 


Replacing a non-polarized wall plug with a properly wired, two-prong, polarized wall plug is often all that's needed to eliminate the risk of ground shocks in vintage guitar amps.





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