Thursday, Nov 19, 2015 at 19:25
Stephen, no - I was agreeing with PeterD's comment re the coax not being 75 (70) ohm.
The O/P did say "I still have the mount on the bullbar it just doesn't have an antenna on it." and from that I would read that the antenna base is there and still connected to the coax.
While I may be
well off target, if this is the usual ex-miner they would simply have removed the radio and the antenna, considering the base/coax/power lead not worth the effort to recover. In that case, the only adaptor would be at the transceiver itself, and that is assuming IT doesn't come with a BNC. I would consider a trade install - as the vehicle would have had in their workshop - to be at least the equal of most DIY coax termination efforts, so if it measures up I would re-use it.
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