ctc12 clone beam current

[DaveWM]

I assume you mean pin 1 and 5 the cathode and the grid?

you can run pin 1 up and down with the hv adj pot. this sets up the overall bias and determines the current shunted by the tube. bigger the difference the (cathode pin higher that Grid pin) the less current flows thru the tube (to a point until its cut off completely and no current will flow). Less current thru tube, the higher the unloaded HV will be (assumes CRT is blank and not drawing any). the voltages ref in sams are "prob" just a reading with the a blank raster as most of the time there is a statement about "no signal" and using a VTVM, setup for normal viewing etc...

things to consider, the type of test equipment used (in this case its prob supposed to be a VTVM)
line voltage
no signal (unless specified like in some of the chroma test points, which is typically color bars)
+/- tolerances ofter 10-20%
resistance and voltage readings are just the starting point and not the only thing to look at if something is not working right.