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In Reply to: RE: What's the purpose of the capacitor on the AC mains line to chassis for? posted by jea48 on October 27, 2016 at 11:37:50
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Sounds like a bad idea.
Back when these amps were new a lot of wiring was ungrounded in houses and two prong plugs weren't polarized. You saw a lot of this type of thing in electronics. You set the ground switch for the lowest noise. If you were performing with other musicians with their own amps and PA's you ran the risk of getting a pretty bad shock if you touched another instrument or mic and you didn't have the ground switch in the right position.
Today we call that a death cap. If you own one of these types of amps, cut that cap out, disconnect the ground switch and install a proper three prong power cord.
Dan Santoni
Today we call that a death cap.
That's an appropriate name for it.... Death Cap.
In the case where the cap was fed hot the chassis of the amp would be hot as well as the signal ground. That in turn would make the Electric Guitar pickup hot. Correct? All is well if the player is isolated/insulated from touching a grounded object. Kind of like holding onto a HOT bare 120V wire. Or as you said come into contact with another instrument or person playing a Guitar that is grounded. Or, how about this, if the other instrument uses the same old cap technology and is fed from an opposite AC Line, leg, and then it could be possible between the two of you there could be a 240V volt potential.
I was doing some research on the subject I found this site below.
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