Evan A. Weitz, a senior lab technician and tutor in Minnesota, uses his skill with electronics to restore vintage audio equipment. Without the intervention of someone like Evan A. Weitz, many older electronic items might be lost forever.
Some antique radios can be restored by a person with basic skills in electronics, though the high voltages used by these radios can make them dangerous for amateurs. In addition, many of the parts should be replaced before the radio is powered on for the first time. All capacitors should be replaced with newer capacitors with a similar value and better voltage rating. Any obviously damaged parts should also be replaced. The radio can be tested with a dim bulb tester, which is a small light bulb wired with the line voltage of the radio. If the bulb glows, no shorts exist along the radio's B+ lines, and the radio can be powered on safely. If a radio passes a dim bulb test but does not work, old resistors may have increased in value or tubes may be damaged. After these are replaced, the radio should work.
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AuthorEvan A. Weitz - Chemist and Electronics Tech in Greater Minneapolis. Archives
October 2019
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