Take a look at the photo and caption on the upper left corner of page 32 of this issue: http://www.history.navy.mil/nan/backissues/1940s/1945/15apr45.pdf April of 1945. A Navy gunnery range, testing aircraft weapons advances, talking to aircraft using three TCS sets, a GF/RU and two SX-28s. So much for the "exclusively VHF" crowd. 73 Dave S.