Voltages are apx !
This is a delta CRT so there are 3 G-2 adjustments. Newer in line CRT's
have just one. The G-2 controls go to 300VDC on one side & 800 VDC boost
on the other. You can vary them in that range ( 300-800 ) A good CRT wont need much. The more G-2 voltage the brighter that color & if too high
you will get the retrace lines.
IIRC this had a transistor for blanking. If it was a sudden fail suspect that.
If a tube blanker its probably a 6KT8, Zeniths alternative to the junky
6GH8.
The B model year was interesting. You could get 14, 16, 18, 19, 20 & 23
and 25 inch sets. Included is the much loved 4 tube hybrid intro.
73 Zeno
LFOD !