Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: Cathode Ray Tube



UCB, as a result of earthquake retrofit, is "dumping" many 3/5BP1/?
tubes. Unfortunately, for your purpose, they are very high vacuum
devices, so the beam's path is invisible, however, of course, the
termination is obvious on its screen. You'll knead a P/S to operate,
but they do have wired sockets. If you or anyone else is interested I
can rescue some of them. They were part of the Berkeley Physics Lab
whose manual I have a copy..

bc

Herbert H Gottlieb wrote:

On Thu, 12 Jun 2003 05:46:02 -0500 Mark Welter
<mwelter@dist214.k12.il.us> writes:


Hello Physharers,

Until recently, the physics and chemistry teachers at my school had
access to a small cathode ray tube (discharge tube?). A student
accidentally knocked it off the table with his supersized backpack.


This tube


was about 10 inches in size, horizontally oriented on top of a base.
We'd zap it with a Tesla coil and deflect the electron beam with a


strong


magnet -- very visual for the students. Is there a way to obtain these


any


more? They worked well and were easy to use. The catalogs don't have
them, but they do have a canal/cathode ray tubes. Has anyone used


these? Are


they any good? I'm hoping to replace a useful demo before school


starts


next year.

Thanks, Mark Welter Prospect High School



I think that your CRT was part of the Klinger Cathode Ray Oscilloscope
(Catalog Number KE5521). This apparatus was specifically designed for
teaching the principles of beam bending and cathode ray physics.
The cathode ray tube (CRT) is transparent so that its internal structure
may be seen and all circuit components are exposed for accessibility.
Two internal plates are provided in the CRT for electrostatic deflection
of the beam and three external coils permit magnetic deflection.
The path of the electron beam is made visible in the tube by glowing
neon gas and the point of impact on the screen is shown by green-glowing
phosphors.

The apparatus and replacement parts are available from;

Klinger Educational Products Corp
112-19 14th Road
College Point, NY 11356
Tel 718 461 1822
FAX 718 321 7756
e-mail IMalleck@KlingerEducational.com

Herb Gottlieb
(From New York City, not too far from the Klinger factory)