Changing Heads?
Putting aside visions of Wurzle Gummidge...
The other day on a transponder check the ATC said he couldn't see my squawk, but then he said he would change his head and lo and behold I could be seen.
What did he do, what are the implications for my transponder, my aeroplane being seen on radar?
I am waiting to get an avionics guy look at my unit, but in the meantime I would appreciate your comments and explanation of what is meant by changing heads.
Thanks H