Yeah, I thought the same thing... a "Wamoscope?"
Was it produced by the Wham-O toy company
that makes the Hula Hoop, the Frisbee, the Super Ball, and Silly String? Wham-O was founded in 1948,
so why not? Actually, Wamoscope is derived from "WAve-MOdulated oscilloSCOPE." It combined a traveling-wave
tube with a cathode ray tube in single enclosure.
See also Simplified
Radar to Use "Wamoscope" from the November 1956 issue of Popular Electronics.
The "Wamoscope" - a Picture Tube That Includes Many Functions
Type 6762 "Wamoscope" is shown with a 15·inch ruler to indicate its size. Also shown
is the solenoid which fits over the tube to focus it along with the r.f. transducers.
New development combines traveling-wave tube with cathode ray tube in single envelope. Operates in
A radically new type of cathode ray tube for radar, television, and other electronic display applications
has been developed by Sylvania Electric Products Inc. in cooperation with the Naval Research Laboratory.
The new electronic device is called the "Wamoscope," from "WAve-MOdulated oscilloSCOPE."
The new tube combines most of the essential [functions of a microwave receiving set in a single tube
envelope, eliminating many of the tubes and components required by conventional receivers. In a radar
receiver utilizing the "Wamoscope," microwave signals go directly from the antenna into the tube, where,
in a single envelope, the signals are amplified, detected, and played on the tube's fluorescent screen.
Compared with a conventional radar receiver, this means that the local oscillator, mixer, intermediate
frequency amplifier, detector, video amplifier, and their associated circuitry are eliminated. Another
important feature is the wide selection of channels possible in the "Wamoscope.' which operates over
a microwave frequency band of 2000 to 4000 mc.
Simplified functional diagram of "Wamoscope" tube showing the elements that operate
on the electron beam. Combines traveling-wave and cathode ray tube principles.
The operation of the tube is based upon velocity-sorting the electrons which emerge from the end
of the helix of the traveling wave tube section. A d.c. beam is passed down the helix. With an r.f.
input. the beam interacts with the r.f. fields on the helix so that the beam is velocity and current
modulated in accordance with the amplitude of the r.f. signals. The velocity-modulated beam enters the
region where the special electron-optical system is located. By applying a suitable bias voltage to
an aperture here, the electrons whose velocity is greater than the d.c. velocity pass through the aperture
and are allowed to impinge upon the screen of the cathode ray tube while the slower electrons are reflected.
Initial uses of the new wide-band tube will probably include special radars and military closed-circuit
Posted August 2, 2016