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Be especially careful with sets that do not use a power transformer. The power line is connected to the chassis and if the power plug is inserted into the outlet the wrong way, the chassis will be at 120VAC with respect to ground.
And beware of the metal cone CRT. It runs at a very high voltage ((12000 to over 20,000 volts). While the current behind this voltage is not lethal, the zap will send you flying into the next two or three adjacent rooms.
Seriously, I worked in a TV repair shop in the late 60's and the owner told me his first encounter some twenty years earlier with an RCA set with a metal cone CRT. He reached in to change a tube while the set was on and the impulse reaction from contact with the metal bell and the resultant belt caused him to jerk his arm and badly slice it on the metalwork. He showed me the bad scar on his arm. The vivid memory of his story has yielded a healthy respect I have for the voltage, which has prevented me from ever receiving a shock from the metal tube.
Apart from the 120VAC, the B plus supply (300 volts or more) requires the most respect.
Last edited by Penthode; 01-18-2012 at 08:49 PM.
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