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Du Mont 22
'
TERMINAL VOLTAGES
Using Weston Model 772 20,000 Ohms per Voltmeter (with Televerter)
Tube
V9
Vl0
V11
V12
V8
V1
V2
V3
V4
V6
Plate
240
240
190
275
115
140
190
180
170
170
Screen
150
l55
-----
290
-----
190
190
180
170
185
Grid
(Control)
-4.3
-4.3
-2.3
-11.5
-----
-2.0
-3.5
-2.25
-2.25
-2.0
Cathode to ground
Contrast on full
Cannot be measured at the grid of V6. Should read
–4 volts at center tap of 5Z3 high voltage winding
to ground.
V7 140 225 -7.5
V17 5Z3 filament to ground = 510 volts
V13 5X3 filament to ground = 1600 volts
(output after L7 = 1550)
V14 2Y2 output = 3950 to 4200 (ground is positive)
(output after R88 = 3800 to 4100 volts)
The above measurements were taken with respect to ground, the following are point to point.
V21 From cathode to grid - 60 to - 160
From cathode to first anode +800 to +1600
From cathode to second anode +5000
TELEVISION TERMS
AUDIO Pertaining to the sound section of the receiver.
AMPLITUDE A term synonymous with gain or size.
AXIS In television the horizontal plane is called the X Axis and the vertical the Y Axis.
CATHODE RAY TUBE An evacuated glass tube comprised of a structure for producing and focusing a stream of electrons
upon an internal screen.
COAXIAL CABLE (OR LINE) A special cable for conveying television signals with as little loss as possible.
CONTRAST CONTROL A control on the receiver adjusting the contrast between high lights and shadows in the picture.
DEFLECTION (MAGNETIC) A system where the motion of the spot in producing the picture is controlled by magnetic
fields.
DEFLECTION (ELECTROSTATIC) A system where the motion of the spot in producing the picture is controlled by the
static action of the deflection plates.
DEFLECTION (PLATES) These plates are located inside a cathode-ray tube and provide for electrostatic deflection of the
beam.
DEFLECTION (COILS) Coils mounted externally about the cathode-ray tube to produce magnetic deflection of the beam.
DIPOLE An aerial comprised of two separate rods.