Re: Electrostatic deflection?

I went to an OLD tube manual and found a 10HP4, a 10" round
electrostatic deflection tube. Deflection in one direction took 100
volts per inch, the other axis was 130. That's only 650 volts
needed to fully deflect in the worst axis! Of course there's is hardly
any current behind that (a BIG help).

Overall length was 19.25". Compare that with a 19" 90 degree
magnetic deflection tube at about 15" in length. Or a 110 degree
tube at about 12".

Of course these are all B&W tubes, not color. I don't know of any
electrostatically deflected color CRTs.

jeff hendrix wrote:

> What kind of angle is on the tube? (is it 90? or something less?)
>
> -jeff
>
> -----Original Message-----
> From: Zonn [mailto:zonn@zonn.com]
> Sent: Friday, October 22, 1999 3:05 PM
> To: vectorlist@lists.cc.utexas.edu
> Subject: Re: Electrostatic deflection?
>
> On Fri, 22 Oct 1999 15:31:00 -0500, you wrote:
>
> >Are you sure the 12" isn't a Digital Storage Oscilloscope? These
> >are basically a raster monitor with a LOT of digitizing circuitry in
> >between. A giveaway is if it has a connector on the back for an
> >external monitor (like the Tektronix 460 series does).
>
> Nope, it's an HP X/Y non-storage scope. It was designed to be used as
> an X/Y monitor with a frequency response similar to a 20mhz scope, if
> I recall correctly. All you have to do is take the top of this thing
> to see a very obvious, statically deflected CRT. It has no yoke, and
> no ability to store anything. Just X/Y size and offsets, focus and
> azimuth adjustments on front, and X,Y and Z inputs on the back.
>
> -Zonn
Received on Sat Oct 23 01:04:46 1999