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I would check the whole HV setup. you need to monitor the cathode current of the HOT, the cathode current of the shunt tube, and the HV at the CRT anode.
the sams should run this down. the shunt generally has a precision 1kv resistor in the cathode circuit, a voltmeter across this will will give the voltage drop which translates into the current. should be between .5v and 1.5v depending on scene brightness and HV setting.
the cathode current on th HOT will be around 180-220ma there are adapaters that have leads in them that break the cathode for a ma meter in its place. I like analog meters for this as its easier to see the needle movement. Here you adj the eff coil to dip to the lowest readings.
there will also be adj for the horz osc, shunting off the sync pulse etc...
are you sure you had the focus voltage?. its the pin with the black lead. For it to be that low it would seem there is something big time wrong, esp if the HV is 24kv. the lower voltage sounds more like a G2 voltage
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