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Subject: Re: High-voltage high-speed gating

Date: 05/15/01 at 6:26 AM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: Re: High-voltage high-speed gating posted by ohyeah on 05/15/01 at 4:53 AM:

That's incredible. Tektronix doesn't remember their own product????? They still remember their earliest scopes dating abck to the 1940s! I think you must have spoken to someone who wasn't interested in being helpful. Id try writing a letter directtly to Tektronix's corporate office to see what they would say.

In the meantime, we'll move on.

There are a lot of web sites that mention "beam penetration" CRTs. An excerpt from one of them is: http://www.css.tayloru.edu/instrmat/graphics/hypgraph/hardware/hardware.htm

Can use 2 methods:
First method (random scan) : beam penetration - have 2 layers (R,G) phosphors. Low speed e- excite R, very high speed e- excite G, intermediate do both so get yellow or orange-- so control e- beam voltage.

G. Scott Owen owen@siggraph.org

It's moving that e-beam voltage that you want to know about. Maybe Mr. Owen has some direct information to share.

From my own recollections, I began working at Bertan High Voltage in February 1979 and we moved from Syosset, NY to Hicksville, NY in mid-1984. What I think I recall is reading an being extraordinarily impressed by the Tekltronix article in Electronics by McGraw-Hill while seated at my desk while still in Syosset. That sets up approximately a five-year time frame in which to look.

I just wish I'd kept the article!

I'll see what else I can find.

Good luck.

John Dunn - President
Ambertec, Inc.
ambertec@ieee.org


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