Frequency mixers

Beam deflection tube

Beam deflection tubes, sometimes known as sheet beam tubes, are vacuum tubes with an electron gun, a beam intensity control grid, a screen grid, sometimes a suppressor grid, and two electrostatic deflection electrodes on opposite sides of the electron beam, that can direct the rectangular beam to either of two anodes in the same plane. They can be used as two-quadrant, single-balanced mixers or (de)modulators with very linear qualities, their mode of operation similar to one-half of a Gilbert Cell, by applying an unbalanced signal f1 to the control grid and a balanced signal f2 to the deflection electrodes, then extracting the balanced mixing products f1 − f2 and f1 + f2 from the two anodes. Similar to a pentagrid converter, the cathode and the first two grids can be made into an oscillator. Two beam deflection tubes can be combined to form a double-balanced mixer. They need extensive shielding against external magnetic fields. The ballistic deflection transistors currently under development employ a similar principle. (Wikipedia).

Beam deflection tube
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Beam deflections. Part 1. Derivation of equations

In this video we derive the equations for the deflection of a beam under an applied load. Video lectures for Mechanics of Solids and Structures course at Olin College.

From playlist Lectures for mechanics of solids and structures

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Electron beam control in a scanning electron microscope

I describe electron beam optics and deflection as they are employed in scanning electron microscopy. http://web.jfet.org/vclk/ - Deflection amplifier http://www.johngineer.com/blog/?p=648 - CRT Christmas tree http://www.fei.com/ - FEI Company

From playlist Scanning Electron Microscope

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Beam deflections. Part 2. Cantilever beams

Solution to the beam deflection equations for two classic cases, 1) a cantilever beam under its own weight, and 2) a cantilever beam with a point load. Lectures created for Mechanics of Solids and Structures course at Olin College.

From playlist Lectures for mechanics of solids and structures

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7 Amazing Physics Tricks with Vacuum pump That You Must see!!!

Physics (la physique) demonstration experiment

From playlist physics

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Refraction (1 of 5) What is Refraction? An Explanation

Refraction, A conceptual qualitative explanation. Refraction is the change in direction of a ray of light as it passes from one medium to another. The amount of refraction is determined by the index of refraction of the media and the angle of incidence. For light, refraction follows Snell

From playlist Optics: Ray Diagrams, Reflection, Refraction, Thin Lens Equation

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Light and Optics 5_1 Refractive Surfaces

The bending of light rays at the interface of refracting surfaces.

From playlist Physics - Light and Optics

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An introduction to Beamforming

This video talks about how we actually have more control over the shape of the beam than just adding additional elements or adjusting the position and orientation of the elements. We can also adjust the gain of the signal to each element and apply phase unevenly to each element, and that

From playlist Understanding Phased Array Systems and Beamforming

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Vintage Computer Tech: 1943 Navy: The Cathode-Ray Tube (CRT) educational (Du Mont Oscilloscope)

Vintage 1943: A restored “old school” educational video by the U.S. Navy on the use of Cathode-Ray Tubes (CRT). This 1943 film covers the basics of the CRT and its uses. CRT technology grew rapidly in the 1940's during RADAR advancements. During the 1950's, early computers started using

From playlist Vintage Television & Radio Technology, film restoration, film preservation, scanning and digitization

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Playing with Cathode Ray Tubes (CRTs - with full explanation)

We explain how Cathode Ray Tubes (CRTs) were invented and how they work, and hook up a few to light them up. They are as intimidating as they are awesome. But did you know that they led to the discovery of the electron, and the birth of a new field, electronics? And of course the inventio

From playlist Tube Based Equipment

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Cathode Ray Tube Experiment and Charge To Mass Ratio of an Electron

This chemistry and physics video tutorial provides a basic introduction into the cathode ray tube experiment. JJ Thompson used this experiment to conclude that all atoms contain negatively charged particles known as electrons. Using this experiment, he was able to calculate the charge to

From playlist New AP & General Chemistry Video Playlist

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EEVblog #524 - Vignetting on a Cathode Ray Tube

Dave explains what causes CRT vignetting problems and how to fix it. A follow up to the HP 35660A Dynamic Signal Analyser video here: http://www.youtube.com/watch?v=VNsJ8qSk6CI Whiteboard explanation of how a Cathode Ray Tube works, and how it can cause interference to sensitive measuremen

From playlist Fundamentals Friday

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Magnetic Forces and Magnetic Fields

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From playlist Physics Demonstrations

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Transformer - Part 8 - Decoder (3): Encoder-decoder self-attention

This is the third video about the transformer decoder and the final video introducing the transformer architecture. Here we mainly learn about the encoder-decoder multi-head self-attention layer, used to incorporate information from the encoder into the decoder. It should be noted that thi

From playlist A series of videos on the transformer

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Physics - Optics: Single Slit Diffraction (5 of 15) Locations of 2nd & 3rd Max & Min = ?

Visit http://ilectureonline.com for more math and science lectures! In this video I will find all the locations of the max and min of the diffraction in general. Next video in series: http://youtu.be/vQPaAEkyDFk

From playlist PHYSICS 61 DIFFRACTION OF LIGHT

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JJ Thomson and the discovery of the electron

In this video I review, with the physics explained, how JJ Thomson discovered the electron I briefly review the history prior and also discuss electric fields, magnetic fields and circular motion and how they all contribute to JJ Thomson's discovery Like what I do? Support by buying me a

From playlist Electromagnetism

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PHYS 102 | Charged Particle Trajectory 1 - Deflecting Charged Particles

Here we think about the direction a beam of charged particles moving at velocity v will be deflected. -----Magnetic Forces playlist - https://www.youtube.com/playlist?list=PL9_sR6Qqqcym4R6mSFGMwqdWpgAnHlt0A -----Use the channel, or take the courses at edX - https://www.edx.org/course?sear

From playlist PHYS 102 | Magnetic Forces

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Electromagnetic Adventures #1: How to steer a proton

In the LHC, there are 1232 components responsible for deflecting the protons, but only 8 responsible for accelerating them. Why is there such a big difference? What do we even mean by deflection and acceleration? This #TeachingTuesday video is the first chapter of our Electromagnetic Adven

From playlist CERN-Solvay Education Programme

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DEMO: Electron Beam in a Magnetic Field

Here you see an electron beam be deflected by a magnetic field. Will it go the right way? I can't wait to find out!

From playlist All Demonstrations

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DIY Scanning Electron Microscope - Overview

Today, I finally produced an image with my DIY scanning electron microscope. I've spent the last few months working on this project, and am encouraged by today's success. There is still a lot of work left to do in making the image higher resolution, and eliminating sources of noise, howe

From playlist Scanning Electron Microscope

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Vacuum Tubes: Episode 1 - The Basics and the Diode

In this episode we finally dig into vacuum tubes. I cover what vacuum tubes are and the fundamentals behind their operation and then demonstrate two different diode type tubes.

From playlist Vacuum Tube Logic

Related pages

Gray code | Sawtooth wave | Electron gun | Square (algebra) | Pentagrid converter | Frequency mixer | G-force