File:Tek 154-0783-00 2.jpg: Difference between revisions

The two left side frames show the forward electrostatic lens elements. Since the deflection coefficient of the helical deflection system (aka traveling wave D.S.) is relatively small, a special lens is used to reduce the length of the CRT in combination with a rather large screen, which, like in a sinema projector, increases the small image at the output from the deflecting system to the large screen. The lower right frame shows the deflecting systems. On the middle right frames, the systems are shown along the X (left), Y (right), and the transition from X to Y system. The upper frames show the features of the Y-deflection design. The spiral is welded from individual "clasps", and has narrowing of the width of the turn at the ends (for matching impedances). For the same purpose, to ensure the desired impedance along the entire length of the spiral, it is wound around a square tube that is "support" in all respects - both as a support layer for the strip conductor, and as just a mechanical support. By the way, about the supports. Spirals of Y-deflection are fixed on the support tubes by means of short ceramic poles, but in the X-deflection they are simply welded into the glass traverse by wire spools on the spiral. This is done to ensure a higher quality factor, because the RF properties of ceramics (losses, etc.) are better than those of glass. Several parts of the CRT were sacrificed for good photographs. First of all, it is a focusing coil that was wound directly on the tube of the tube, starting from the cone and ending with the middle of the "objective" part of the neck. A coil with a width of about 50 mm had 1800 turns of wire about 0.15 mm in diameter. Of course, among the victims were the protective shells of the terminals on the neck, which were attached to the tube with pieces of scotch tape.