This looks like the final answer:
YMMM/R235 ALICE SPRINGS
ELECTRO−MAGNETIC HAZARD
LATERAL LIMITS: A circle of 4.0NM radius centred on
22 58 54S 134 26 52E
VERTICAL LIMITS:
SFC − 7000
HOURS OF ACTIVITY:
H24
ADMINISTERING AUTHORITY:
Dept of Defence − RAAF
CONTACT: Duty OPSO: 0418 835 846
Transmitter or radar receiver ?