There's good news and bad news. All these radios are unlikely to be UHF, the KG 15B is apparently a VHF high ( 150-170 mhz) so the others are probably the same. There is a some use for them in various areas, but not for CB. All of them use a eprom to store program channels. Of the lot, the syntrx is the more powerful and useful. The bad news is finding an eprom programmer and writing code/ finding program for it. The word hens teeth comes to mind.
Of course I could be wrong on what the others are, so find your local radio repairers and gently ask them.

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Langy (95 Tdi Manual - 3 doors - 2 seats - 2m of sleeping room !)