Data set 01
1940 RCA
Published operating points and test conditions from this source.
Beam Power
Characteristic
RCA
7200 ohm
RCA-25CD6-GB is a high—perveance beam power Plate Resistance (Approx.) . . . - 7200 ohms
tube of the glass—octal type designed especially for Transconductance
7700 µS
tube of the glass—octal type designed especially for Transconductance . . . . - 7700 pmhos
Other
use as a horizontal-deflection amplifier tube in G"F')‘]ja{‘é’ éuxféfi?ggf(fpfif?fl(.;m;g;e _
55 V
use as a horizontal-deflection amplifier tube in G"F')‘]ja{‘é’ éuxféfi?ggf(fpfif?fl(.;m;g;e _ 55 volts
television receivers of the "transformerliess” type. pilate Currente. o« » » « o o « «
75 mA
television receivers of the "transformerliess” type. pilate Currente. o« » » « o o « « . 230% 75 ma
The
5.5 mA
The 25CD6-GB is | ike the 25CD6-G and 25CD6-GA, Grid=No.2 Current. . . . . ... = 21% 5.5 ma
of 7000 volts, a maximum plate dis— Bulb v ¢ v o v v v e v v
7000 V
of 7000 volts, a maximum plate dis— Bulb v ¢ v o v v v e v v v v v v o v v v o v v v w o Tmi2
sipation of
-1 W
sipation of 20 watts, and a maximum bulb tempera—~ €&+» « + =+« ¢ v ov o v v v . oSmall (JETEC No.C1-1)
mu~factor, high plate current at low plate volt- Medium-Shell Octal
8 V
mu~factor, high plate current at low plate volt- Medium-Shell Octal 8-Pin with External
having a deflection angle of
90
having a deflection angle of 90 degrees. r NMVWWA- o” o
for maximum distribution of heat to prevent hot €
4
for maximum distribution of heat to prevent hot €4 = RATED HEATER VOLTAGE OF TUBE UNDER TEST.
ampere heater havingacontrolled warm—up time to Fig
1 A
ampere heater havingacontrolled warm—up time to Fig.1 - Test Circuit for Determining Heater
GENERAL DATA oc {Including boost)
700 V
GENERAL DATA oc {Including boost) . . . . .. . 700 max. volts
Electrical: max.y .« . .«
70009 V
Electrical: max.y .« . .« 70009 max, volts
Heater, for Unipotential Cathode: Peak negative-pulse® ., .,
1500 V
Heater, for Unipotential Cathode: Peak negative-pulse® ., ., . . . .. 1500 max, volts
VOltage. o o o o o« o s o s o o o o s
175 V
VOltage. o o o o o« o s o s o o o o s 25 volts DC GRID-No.2 (SCREEN) VOLTAGE. . . . 175 max., volts
Currents v w o v v s o o v
1 A
Currents v w o v v s o o v 4 0 e 0 0.6 ampere GRID-No.1 (CONTROL~GRID) VOLTAGE:
Wwarm-Up Time {Average)
-50 V
Wwarm-Up Time {Average) . . . . . . . 11 seconds ] -50 max., volts
Heater warm-up time is defined as the time required Peak negative—pulse. . « . « +
200 V
Heater warm-up time is defined as the time required Peak negative—pulse. . « . « + . . 200 max., volts
in the test circuit shown in Fig
1
in the test circuit shown in Fig.1 for the voltage CATHODE CURRENT:
to 20 volts. DC v v v v v e e e e e e e e e e 200 max, ma
200 V
to 20 volts. DC v v v v v e e e e e e e e e e 200 max, ma
Direct fnterelectrode Capacitances Peak v v v v v e e
700 mA
Direct fnterelectrode Capacitances Peak v v v v v e e 700 max, ma
Approx., with no external shle]d) GRID=NO
3 W
Approx., with no external shle]d) GRID=NO.2 INPUT:. ¢ o « « 5 o o o o & 3 max. watts
Grid No
20 W
Grid No.1 to plate . . . . . 1.1 upf PLATE DISSIPATIONt o v v v v v o . 20 max. watts
Grid-No
3
Grid-No.1 to cathode & grtd No 3, PEAK HEATER-CATHODE VOLTAGE:
Plate to cathode & grid No
200 V
Plate to cathode & grid No. 3, to cathode « « v v & & 4 & . W 200 max. volts
L . to cathode + v v v ¢ & o o o W
200 V
L . to cathode + v v v ¢ & o o o W 200% max, volts
Plate voltage. « v v v v o o o
225 V
Plate voltage. « v v v v o o o . 60 175 volts on bulb surface) . . o « o+ .+ & 225 max, %
Grid-No
175 V
Grid-No.2 (Screen) Voltage . . . 100 175 volts f . . . :
Grid-No
-30 V
Grid-No.1 (Control-Grid) Voltage 0 -30 volts Maximum Circuit Values:
Grid No
0.47
Grid No.1. « . « . - 3.9 For grid-resistor-bias operationt. 0.47 max, megohm
center voltage value of |
17 V
center voltage value of |17 volts.
volta?e pulse does not exceed
15
volta?e pulse does not exceed 15 per cent of one hori-
zontal scanning cycle. In a
30
zontal scanning cycle. In a 525=1ine, 30-frame system, data for peak positive-pulse plate voltage is a