I have discharged several CRTs in my career. The only reason I have ever had to discharge a CRT was to dispose of it. The method I have always used is to get a long thick flat head (standard) screwdriver, connect my jumper cables to the metal shaft of the screwdriver (both black and red), then I attach the other ends of the jumper cables to a metal water pipe that goes directly into the ground. The pipe has to NOT have paint on it. It have it’s natural metal exposed to make proper connection for ground. Twist the jumper cables on the pipe to make a good connection and clamp them down if you feel the connection isn’t secure. Use a screwdriver with a hefty plastic handle and wear rubber gloves. Once you take the back off of the CRT, slip the jumper cabled connected screwdriver under the “suction cup” that is attached to the back of the CRT monitor and make connection with the flat screwdriver several times to the metal clamps that are clamped inside the CRT under the suction cup. Try not to touch ANY OTHER part of the chassis before you do this. This must be done first before you can safely remove the suction cup with a pair of pliers. Once the suction cup is removed, touch the grounded screwdriver to the metal contacts in the suction cup again just to be safe. Once the suction cup is removed, I then get my power drill with a very small bit and drill into the area where the suction cup was clamped. I apply very little pressure to avoid cracking / breaking the CRT. Once I have the hole drilled, I wait for the hiss to stop and I then know the CRT has been pressurized and can be handled safely. [br]
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if any of you have a better method, please let me know. I’ve been doing it this way for years.
Chris