Re: red alert
Posted by HH56 on 2017/3/26 20:48:31
Neg goes to the fuse although that only powers the tube and bulb filaments, solenoid for the button assist, vibrator and the primary side of the power transformer. After the transformer secondary passes thru the rectifier tube then internally the high voltage supply is referenced by itself and will remain the same for the working electronics no matter what it sees on the primary side. At least that is my theory why radios in cars with accidentally (or purposefully) reversed batteries never seem to miss a beat.
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