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On Thu, 12 Jun 2003 05:46:02 -0500 Mark Welter
<mwelter@dist214.k12.il.us> writes:
Hello Physharers,This tube
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.
was about 10 inches in size, horizontally oriented on top of a base.strong
We'd zap it with a Tesla coil and deflect the electron beam with a
magnet -- very visual for the students. Is there a way to obtain theseany
more? They worked well and were easy to use. The catalogs don't havethese? Are
them, but they do have a canal/cathode ray tubes. Has anyone used
they any good? I'm hoping to replace a useful demo before schoolstarts
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)