New 169th Fighter Wing Air-to-Air

Recently, I have been unable to find an air-to-air frequency when some 169 FW (SC ANG) flights, HEAT flights in particular, have been working Townsend Range. This has usually been while I was mobile and was unable to search. This afternoon, HEAT 61/62 flight worked Townsend Range and I wasn't hearing anything on the usual 169 FW air-to-air frequencies. A search discovered them on 135.125. As yet I don't have a designator for 135.125, but I have programmed it in the scan banks and will be listening for one.