Thanks all,
Well, part of the issue is that I really like old test equipment so this is a fantastic excuse to buy more.
More realistically, I am dubious of the cheap VNAs but will look into them as option, the low resistance of the coils I think might be an issue for them.
Renting a unit might well be the most sensible way forwards.
1audio, thank you for the link to nice current monitors, this is something I have looked at briefly before - the main issue is their size, this is a PCB coil, its physically small with fets within 10mm of the coil terminals and a capacitor bank across the fets. Any increase to length/inductance decreases the peak current quite substantially.
I am able to solder a wire to the coil to divert a small proportion of the current which allows me to at least look at the current waveform using my trusty P6021.
Tim, thank you for note regarding ESR changing with frequency, my plan is to set up the sim for each frequency rather than to sweep through as you mention. This is one of the main reasons for using an LCZ as I can test the coil at say 100khz and compare the sim at 100khz.
I have one of these in a draw somewhere:
http://www.cypherinstruments.co.uk but again would be dubious of the results. I'll give it a go and see if I get anything sensible from it.
Bob - I am not familiar with Q meters so will do some reading thank you.
Thank you for the thoughts all and apologies for the disjointed reply - hope it makes sense.
Rob