RE: Is my JR screwed?
For at least the last 50 years and probably 50 years before that, the industry standard for concentric type plugs has been: Center is positive or signal while the outside has been negative or ground. I first learned this when I began studying for my ham license over 50 years ago. I gave up on JR years ago for other reasons but not following standards is one more reason for not using JR. Even if I did use JR radios, I cannot damage my equipment with the charger because I have only used the Sirius Charge for the last 7 years. The Sirius Charge checks for polarity and will not attempt to charge the battery unless the polarity is corect.