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I do not have a specification, but a story.
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A year ago I got around to investigating why the front fender mounted antenna on my 1966 Corvair was not working, infinite resistance from Motorola plug to the antenna shaft. I suspected a bad ground from base to fender (did not explain infinite resistance, but common problem) or bad connection at the bottom of the antenna. GM antennas of this era usually have a screw on plug connection at the base of the antenna. I unscrewed the coax from the antenna, and removed it from the car. Investigation revealed the center conductor, a small 30 or so awg copper wire had corroded and disappeared in places! So I ran a new piece of 30 awg wire through the (compared to the inner 30 awg conductor) large plastic tube that holds the center conductor inside the outer braid and soldered it to the Motorola plug and the GM connector. Works GREAT! Somewhere here I have several lengths of original Wards Antenna coax I picked up almost 50 years ago from Avec Electronics in Richmond, VA...... That's when I first noticed the tiny center conductor inside a large cavern of plastic tube inside the outer braid. Not sure this is limited to early auto radio, as I cut into an antenna coax on a mid 80s Nissan truck, and it was the same small conductor in large tube construction. But, maybe 80s is early, now! Frank DuVal On 4/29/2019 3:26 PM, Brad Thompson wrote:
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