That and perhaps what he asserts is nonsense?
The grid is most assuredly biased relative to the cathode
on this, and probably any, CRT.
-Chuck Harris
Michael W. Lynch via groups.io wrote:
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On Sat, Jan 2, 2021 at 01:43 PM, David Campbell wrote:
5. Possibly the main point, there is **** NO such thing as grid bias.**** No
such thing as base bias in transistors either. Control is exerted from GRID to
CATHODE. A grid cannot control the space by itself. It is an electro-static
couple with the Cathode! Base bias is meaningless without the emitter.
David,
This may be the source of confusion for those of us not as well versed in these issues. Regardless of your fine technical explanation, TEKTRONIX still calls R1375 "GRID BIAS" on the schematics. That being said, who am I to argue the point? If some EE or Designer at the place that made the instrument calls it "GRID BIAS", then for continuity we poor and less educated souls in the field tend to use that name. Right or wrong, that is the name that shows up on the schematics. Another one of the many error and omissions we find in various schematics.
I appreciate your explanation of what is supposed to go on here!
Sincerely
