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Can you put a polarized plug on an S38E Hallicrafters and minimize the shock hazard?
Wiki User
∙ 15y ago
Original Answer: Yes, the wide blade of the polarized plug would connect to the chassis of the radio. Another solution to the potential shock hazard would be to use an isolation transformer between the radio power plug and the power outlet. Correct Answer - NOT YET! Depending on which wire you choose to be the 'wide', or 'Neutral' blade, the chassis will either be 1) hot all the time, until switched on, or: 2) hot when switched on. Hallicrafters put the switch near the chassis ground because they felt this would remove 'hum' from the audio. Unfortunately it creates a hazardous situation that is only mitigated by having the chassis electrically separated from the cabinet by plastic spacers. If these plastic spacers fail, the cabinet could become hot.
To correct this, one needs to go inside the radio and SWAP where the 'on' switch: moving the 'newly polarized Neutral to the spot where the switch currently goes; then take the switch and move it between the newly polarized HOT line and where the old wire went. All that is needed is a soldering iron and possibly an additional few inches of 18-ga wire. For a pictorial view of what takes place, see: http://mikeyancey.com/S-38B_refurb.php
Wiki User
∙ 15y ago
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