nostr:npub16jupxu70nh0pg0wt4maseaf2fg3kv2tgcjal2kaaunms2ltdaxysdry8u7 We run them 5 a time in parallel to run 100kW 915MHz magnetrons, so we have a fair few about the place.  I think the 20kV supplies were at least being looked at when I left, but it is a decade ago.