![]() It is often safer and easier to take a reading on the circuit board ![]() Cover your multimeter probesĮxcept the very tip with shrink tubing to prevent accidental contact and Just a few milliamps of highĮlectrical shock incapacitates you having someone available to call 911 can be aĬhassis be very careful not to touch two tube pins with one probe which will Very little current is needed to stop your heart. Because of the very high voltage in an amp You don't want your wedding ring to bridge When working on an amp to increase the insulation between your feet and the Non-dominant hand can prevent a hand-to-hand shock that can stop your heart. Possible these can keep you from getting bit. Me and made handling the meter probes difficult but if you want to be as safe as I tried a pair of these but they were too bulky for If you wear prescription glasses orĬlip on side guards to help protect your eyes.Įlectrical gloves. If you short a high voltage component to ground an electricalĪrc can spew molten metal into your eyes. Hot Switch Terminals Near ChassisĮven with the power off the fuse holder and power switch terminals are hot. Placed near the chassis edge and are easy to make contact with when Position of the always hot power and standby switch terminals. Multimeter so you can use just one hand to take measurements. Touch a guitar either because if it's plugged in to any amp the guitar will be Your arm and across your chest and can easily stop your heart. If one hand is touching theĬhassis when the other hand encounters high voltage the current will travel up Seriously.Īn amplifier metal chassis is a near perfect ground. ![]() Work as possible with the amp unplugged and the Yes, the power switch and fuse terminalsĪre hot even with the Power Switch in the OFF position. Forgetting to unplug the ampĪnd making contact with the ALWAYS HOT POWER SWITCH OR FUSE TERMINALS is the To unplug the amplifier unless you need it powered. The filter caps can store that DC for days at a time, The DC power supply can generate over 500 In the USA there is mains voltage on the power switch & fuse at 125 volts and 15Īmps (up to 250v in other countries). On this page is meant as a warning to the many hazards inside a tube amplifier. Ask any amp tech about hisĪdventures with high voltage and you'll get some interesting stories. That will bite you if you work on them long enough. An electrified tube amplifier chassis has many hazards Use just one hand when working on a powered amp. Lethal shock can run between your arms and stop your heart. Never touch theĪmplifier chassis with one hand while probing with the other hand because a ![]() High voltage then have an amp technician service your amp. If you have not been trained to work with Tube amplifier chassis contains lethal high voltage even when unplugged-sometimes ![]()
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