My tube gear mostly consists in HP types 400D and 412A voltmeters. I also have a couple of Boonton Q meters and a GR 1644-B bridge. My HP 410B is part of my ham station where it measures the output to the antenna.
I am mildly annoyed by the warmup time as well as the high internal temperatures that invite failure. But I have these instruments and they work very well.
My HP 428A failed and I am unable to repair it; the probe is the problem.
I have plenty of tube type units that are surplus to my needs and would love to trade them off. They are mostly in my garage awaiting disposition. Signal generators, voltmeters, bridge, deviation meter, power supplies.