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If you are testing a "hot chassis" set, always use an isolation transformer to prevent electric shock. 4. Top Free YouTube Channels for TV Repair

This is the "gold standard" community for television restorers. If you have a specific technical question about a tube or chassis, the experts here usually have the answer. 3. Safety First: The "Tube" Warning

On the final day of an estate sale, large CRT units are often marked as "free" or $5 because they are difficult to move.