My CT-100 lost HV (from losing one B+ line).

[dtvmcdonald]

Yes I do have a DMM with peak hold, but the current setting seems to be kaput.
Maybe it blew an internal fuse.

But I have something better! I have a Hall effect current probe
that measures below a mA and has a 50 MHZ frequency response.
I could feed this into a digital scope with glitch detect and store.

It does have the problem that the largest wire that it can take
is about 1mm dia and its **not insulated** . So I often must
install a loop to use it on.

I think its the AGC. I got a simulation to generate 40 mA spikes
lasting tens of milliseconds coming from the AGC tube screen during
simulated signal changes. That's not enough to blow the fuse, but
its just a simulation.

Perhaps this is supposed to be a slo-blow fuse? I lost the
original and as far as I can tell, the parts list does not say.