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Re: Cathode Ray Tube



Be careful about using a Tesla coil - you could be producing more X rays
than you want. A power supply limited to 5 kV is supposed to be safe in
this respect.

I get this type of item from a UK supplier (Harris) in whose catalog the
various tubes (they have a range for different experiments) are called
"Teltron" tubes - I presume this is the manufacturer.

Mark

At 09:56 12/06/03 -0400, Herb 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)

Mark Sylvester
UWCAd
Duino Trieste Italy