1/17/2024 0 Comments Fender musicmaster amp transformer![]() ![]() Neutral and are not safe to connect line to ground like a death cap. Want for mains voltage up to 250 volts AC.Ĭlass X safety caps are designed to connect across the mains from hot to 01uF 400VDC 250VAC Class Y safety capacitor is what you ![]() Safety capacitor that is designed to fail open. If you are dead set on keeping a death cap then replace it with a Class Y I also recommend disconnecting or removing all death caps because they can be anĮxtreme shock hazard if a three prong power cord is plugged into an improperly I strongly recommend replacing all two wire power cords with three wire cords Of course no DCĬan flow through the death cap to ground so again, it willįlow through anyone that touches the chassis. The current will flow through anyone that touches the chassis. Loose wire electrifies the chassis the death cap will limit AC flowing through it to Position with the chassis and death cap connected to neutral (ground), if a With the ground switch in its usual quietist The death cap provides only AC RFI ground, not a The safety ground also provides RFI noise Safety ground to chassis, mitigates this risk by shunting any stray voltage and current on No RFI noise protection and there is no protection from a hot AC powerĬoming loose and electrifying the chassis to create an extreme shock hazard. Floating chassisĪre not used in tube amps for two main reasons: A floating chassis will provide Matter the orientation of the power plug in the wall socket. A normallyįunctioning amp's floating chassis will not be electrified by 125v no Since the power transformer primary is not connected to the chassis. With a two prong power cord and no death cap the chassis voltage will float It's bridge and strings electrified at 125 volts. A guitar connected to this amp will also have It because the shorted death cap will connect the hot wire to the chassis. ![]() So the neutral wire is connected to the death cap, but flip the power plugĪround in the socket and the chassis will have 15 amps of 125 volts on There are two possible outcomes: the amp will be normal with the amp plugged in With a shorted death cap and a two prong power cord The "death cap" got its name because if it fails as a short it can electrify theĬhassis with full mains power, which is 15 amps at 125 volts in the USA and plenty of I didn't know that all I needed to do was turn the wall Milliamps of AC current will flow through the cap, onto the chassis and through you if youīack in the 1960's we had a washing machine in the basement that would shock 05uF death cap has 53k ohms of reactance at 60Hz. Of course in modern times no shock is acceptable.Ī. 05uF cap will pass 3.5ma which is still a safe Will pass only 2.4 milliamps of AC current so any shock received by touching theĬhassis or guitar will be mild, but it can be enough to startle you and cause The chassis will be electrified at 125v AC because the death cap will allowĪ small AC current to pass through it. Death Cap With No Ground Switchĭeath Cap in the Fender 5F1 Champ connects power cordĮven with a perfectly functioning amp when the death cap is connected to the hot wire Hum resulted from having the death cap connected to the neutral (ground) wire. The other way would connect the death cap to the hot wire. One way would connect the death cap to the neutral wire, Try the two prong power cord plugged in both ways in the wall socket and use the The death cap was hardwired between one of the power cord wires and the chassis. Some amps like the Fender 5F1 Champ had a death cap but no ground Assume a two prong power cord in the following Neutral white wire is connected to ground at the service entrance so "neutral" = In the USA a power cord's black hot wire has 125 volts AC on it, and the The bottom line is if a death cap fails as a short it can kill. That's why it's called a "deathĬap" although no electrocution has been traced back to a failed death cap but Volts-to the guitar strings which can kill. The cap will behave this way even when working properly but if the death capįails as a short it can pass full wall voltage and current-15 amps at 125 Touch a grounded object such as a microphone while touching your guitar strings. The current is limited to aboutĢ.3 milliamps but at 125 volts it's still enough to give you a good shock if you "backwards", mains or wall AC voltage (125v in the USA) will pass through the death capĪnd on to the amp chassis and guitar strings. Reduce hum picked up from outside the amplifier. With no chassis safety ground, the death cap connected the power cord neutral That could plug into the wall socket upside down or right-side up and In the days of non-polarized two prong power cords The original purpose of the "death cap" was to create an AC ground for theĬhassis to provide radio frequency shielding. ![]()
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