Cavities, the top cavity top fell apart, fixed (steel screws and brackets)
1.5mm loops and inductor
No low inductance (that wire) can get the pass and notch spacing better than 2MHz.
I believe (know) the thin wire has more inductance.
So, it looks like we need series inductance in the coupling loops.
(I did see that mentioned in the literature, suggesting a coil perpendicular
to the cavity's magnetic flux.)
Or, inductance from the loops to the N sockets. I'll try that.
with inductance 1MHz cals.
one coil 180, inductance
one coil 180, inductance, 1MHz cals.
cavity with knob, 1MHz cals. Thin 1.5mm wire, Philips beehive trimmer
The Wiltron RF analyser