Quote:
Originally Posted by bandersen
If it were electrostatic focus, would there be more than 5 pins on the base ?
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That is usually the case, but the 17SP4 has an internally connected focus element and only 5 pins...either way, you should be able to see the extra focus elements in the gun structure.
Quote:
Originally Posted by bandersen
Here's a side view with the 17BP4 on the left and unknown on the right. The curvature is less, but I wouldn't call it cylindrical.
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Nor I... but looking at my 2 Philcos with spherical faceplates, they don't look
quite as flat in the vertical direction as a Trinitron did, but perhaps this is an optical illusion, caused by the Flat safety glass in front of the tube(s).
jr
Update: Just removed the safety glass on one Philco and took this shot of a cylindrical faceplate, the 17QP4 faceplate is pretty darn flat in the vertical direction.