Using a VNA and building a RF Choke

DATE CHANGE - MARCH 31 9AM SUNDAY

Using a VNA and building an RF choke.
The event will be held in San Mateo on Sunday March 31 at 9 a.m. at the following place: https://w3w.co/loving.drag.mobile

I will bring several torroids:
31
43
61
77
Feel free to bring the same or other unique mixes to try. Plus bring a coax that will easily loop through the core 1 or several times.
If you have a VNA (Vector Network Analyzer) please bring it.