Don't know if it's really any help, but I do remember the aerial going from the tail to the mast near the cockpit and then going out to a wingtip on this particular aircraft. The tensioning spring behind the radio mast was quite stretched so the actual aerial was hanging loose - I had to duck under it a few times during the couple of times I crawled all over it with a vacuum cleaner and large brush. I also remember that the cockpit canopy was locked by a retrofitted large rusty padlock...
Most of the aircraft in this collection were looking pretty old and tired when I was last there four or five years ago (since the owners passed away the museum has not been open to the public and I got in on 'working bee' days with the Sydney Branch of the Royal Aeronautical Society).
No idea what happened to the original radio sets however.
Adam