Reading your comments - FM aerials - If I recall the whirlwinds at the time had VHF - 1985 series - single dipole aerials, TX/Rx, Arc 52 UHF TX/RX - Bladea aerials, and Collins hh - wire aerials along the tail boom - I was on 110 as a wireless mech - Dec 1964 to Dec 1965 - spent Sept to end Nov at the Gaat