01-19-2012, 03:42 PM
Your radio with the original mechanical vibrator will work on positive or negitive ground, if it had a sychronous vibrator it would be polarity sensitive,
Again I'd get that old vibrator working to test your radio with , buzz the old vibrator on AC in series with a 40 watt light bulb
Again I'd get that old vibrator working to test your radio with , buzz the old vibrator on AC in series with a 40 watt light bulb