The A4D was the worst for me with that damned "biscuit" which
housed
it all. The ARC-27 was my bread and butter gear. Easy to
diagnose
problems. Using the bicycle pump always attracted the
attention of the
other shops. The only gear I never really understood was the
APX-6
transponder. I always kept a wary eye on that live round .45
shell
aimed at the Top Secret cavitron.

Ah ha, the old ASQ-17. It was used on the A4D, F-8U, and believe
the F-11.

Leanne