Mike,
Just this afternoon, I nabbed a pretty good confirmation on TG 1507. Still can't firmly ID what the TG is used for but I can say that I did confirm hearing Jefferson County sheriff's units on there. I heard two units chatting about a how one requested a tag listing but never got a reply from the Jefferson County dispatcher. A minute later I heard the same unit on Jefferson Co. Sheriff VHF-hi freq. request a response on his tag request. He was having radio trouble on the VHF rig and apologized if he missed her response, because he was on the new high band radio and may have missed her calling him.