Data set 01
1940 RCA
Published operating points and test conditions from this source.
Cathode Ray
Other
RMA release #
399 mA
RMA release # 399,
ing a fluorescent viewing screen two inches in The undeflected focused spot will fall within a
10 in
ing a fluorescent viewing screen two inches in The undeflected focused spot will fall within a 10-mm
of electrostatic electrodes for deflection of and pJy. sSuitable test conditions are: anode No
2 V
of electrostatic electrodes for deflection of and pJy. sSuitable test conditions are: anode No.2 volts;
600; anode No.1 volts, adjusted for focus; deflecting—
1 V
600; anode No.1 volts, adjusted for focus; deflecting—
the electron beam. The
1 ohm
the electron beam. The 902 will operate with electrode resistors, 1 megohm each, connected to anode
anode voltages as low as
2 V
anode voltages as low as 400 volits, and it can No.2; the tube shielded from extraneous fields. To avoid
damage to the tube, grid No
1 V
damage to the tube, grid No.1 voltage should be near cut-
replace electricalty the RCA
91 V
replace electricalty the RCA-91i3 provided the off before anode voltage is applied.
anode No
400 V
anode No.2 voltage is not less than 400 volts.
HEATER VOLTAGE (A.C. or D.C.)
10 V
HEATER VOLTAGE (A.C. or D.C.) 6.3 +10% Volts
HEATER CURRENT
600 mA
HEATER CURRENT 0.6 Ampere
DJs to All other Electrodes
9.5 pF
DJs to All other Electrodes 9.5 uuf baffles between contacts provides an additional
ANODE No
2 V
ANODE No.2 (High-voltage glectrode) demagnetized.
VOLTAGE
6.3 V
VOLTAGE . 660 max. Volts The heater isdesigned to operate at 6.3 volts.
ANODE No
330 V
ANODE No.1 (Focusing Electrode) VOLTAGE 330 max. Volts
GRID No
1 V
GRID No.1 (control Electrode) VOLTAGE The transformer winding supplying the heater pow-
PEAK VOLTAGE BETWEEN ANODE NO
2 V
PEAK VOLTAGE BETWEEN ANODE NO.2
and ANY DEFLECTING ELECTRODE
385 V
and ANY DEFLECTING ELECTRODE 385 max. Volts the rated voltage under average |ine-voltage
CIRCUIT at HEATER-SUPPLY FREQUENCY
1 ohm
CIRCUIT at HEATER-SUPPLY FREQUENCY 1 max. Megohm
GRID-CIRCUIT RESISTANCE
5 ohm
GRID-CIRCUIT RESISTANCE 5 max. Megohms cause ahigh voltage to appear between the heater
Anode No
600 V
Anode No.2 Voltage* 400 600 voits
Anode No
1 V
Anode No.1 Voltage for Focus be adequately insulated to withstand the high
at 75% of Grid voltage for
75 V
at 75% of Grid voltage for
cut—off (Approx.)**
150 V
cut—off (Approx.)** 100 150 Volts voltage.
Grid voltage for cut-off#
-60 V
Grid voltage for cut-off# -40 -60 volts
DJ1 and DJ2
0.182 V
DJ1 and DJ2 0.273 0.182 mm/volt p.c. one side of the heater. The terminal for this
DJ3 and DJy
0.214 V
DJ3 and DJy 0.321 0.214 mm/volt p.cC.
DJ1 and DJz
902 V
DJ1 and DJz 93 139 voltspi/in. The fluorescent screem of the 902 employs
DJ3 and DJy
117 V
DJ3 and DJy 78 117 volts pG/in.
No.2 voltages. in general, anode No.2 voltage should not ities as well
2 V
No.2 voltages. in general, anode No.2 voltage should not ities as well as high luminous efficiency.
be less than
300 V
be less than 300 volts.
Individual tubes may require between
-35 V
Individual tubes may require between +20% and -35% of The d-c supply wvoltages for the electrodes
values shown for focus when grid No
1 V
values shown for focus when grid No.1 voltage is varied
values not greater than
10 ohm
values not greater than 10 megohms between each or the negative end of the cathode-ray high-volt-
anode No
2 V
anode No.2 voltages are given under TYP|CAL OPER- d-c amplifier circuit such that the potential
The high voltages at which the
902 V
The high voltages at which the 902 is operated voltage across the deflecting electrodes will be
crease with decreasing anode No
2 V
crease with decreasing anode No.2 voltage. In
general, anode No
2 V
general, anode No.2 voltage should not be less
of anode No.| voltage to anode No
400 V
of anode No.| voltage to anode No.2 voltage. Or- than 400 volts, The maximum value shown under
Spot intensity, for a given anode No
2 V
Spot intensity, for a given anode No.2 volt- the minimum consistent with the desired bril-
Anode No
2 V
Anode No.2 voltage may be chosen from a range to anode No.2 may be increased to the maximum
of values. As anode No
2 V
of values. As anode No.2 voltage is increased, value. This procedure, however, Is not always
Ry —
5 ohm
Ry — 20000 OHMS, 5 WATTS
Cy3 Cyy —
0.5 pF
Cy3 Cyy — 0-1 pf, 250 V. Rs = 650 OHMS, 0.5 WATT
C, - 0.0008 uf, 500 V. Cy5 - 0.1 pf, 600 V.
600 pF
C, - 0.0008 uf, 500 V. Cy5 - 0.1 pf, 600 V.
Cyg Cy7 —
0 pF
Cyg Cy7 — 0-25 pf, 500 V, Rg - 25000-0HM POTENTIOMETER
€, - 0.002 pf, 600 V, R9 — 15000 OHMS, 0.5 WATT
0.5 pF
€, - 0.002 pf, 600 V, R9 — 15000 OHMS, 0.5 WATT
ci - 0.005 pf, 500 v. Cyg Cy9 — 0.5 pf, 500 V.
500 pF
ci - 0.005 pf, 500 v. Cyg Cy9 — 0.5 pf, 500 V.
Cg - 0.015 pf, 500 v. —~OHM POTENTIOMETER
500 pF
Cg - 0.015 pf, 500 v. —~OHM POTENTIOMETER
Chy Cog —
2 pF
Chy Cog — 0.003 pf Ry - 2
00 v 0. WATT
0 W
00 v 0. WATT
R12 12 - 25000 OHMS, , 0.5
0.5 ohm
R12 12 - 25000 OHMS, , 0.5
pf,
15 pF
pf, 500 v’ Coy 22 ~ 2325 pf, 15 V.
R13 13 — 500 " WATT
500 W
R13 13 — 500 " WATT
£0000. OHMS, on 0.5
0.5 ohm
£0000. OHMS, on 0.5
Cr pf,
500 pF
Cr pf, 500 V.)
Cg -=
0.5 ohm
Cg -= 0.25 o R1y — 300000 OHMS, 0.5 WATT
Co Cor Coy Cyp =
1 pF
Co Cor Coy Cyp = 8 pf R, - 10000 OHMS, 2 WATTS 1OMETER
9 10 aap (Working LT ol3 _ 15000 ONMS, ) 2 WATTS Ri5 MEGOHN, POTENT
2 W
9 10 aap (Working LT ol3 _ 15000 ONMS, ) 2 WATTS Ri5 MEGOHN, POTENT
Ti -- 12~-MEGOWM 0.5 WATT
0.5 W
Ti -- 12~-MEGOWM 0.5 WATT
. R17 — 70000 OHMS, 1 WATT
1 ohm
. R17 — 70000 OHMS, 1 WATT
int age :; Ryg
1 ohm
int age :; Ryg - 100000 OHMS, 1 WATT
si Ryg R2
0.5 ohm
. si Ryg R20 — 0.5-MEGOHM POTENT |OMETER
with
10000 ohm
with 10000 ohms and decrease value unti ed T easive
tained. This method protects condensers Cq and Lyg Rp1 R2
0.5 ohm
tained. This method protects condensers Cq and Lyg Rp1 R22 — 200000 OHMS, 0.5 WATT
voltage. R2
0.5 V
voltage. R23 R2y - 1000 OHMS, 0.5 WATT
poiot R2
0.5 ohm
poiot R25 R26 — 2 MEGOHMS, 0.5 WATY
* the
15 mA
* the 883 will not oscillate when L ~ 30 HENRYS, 15 MA.
Ef =
6.3 V
Ef = 6.3 VOLTS FOCUSING ELECTRODE (ANODE Nei)
HIGH-VOLTAGE ELECTRODE (ANODE N2
2 V
HIGH-VOLTAGE ELECTRODE (ANODE N2 2) MICROAMPERES
Characteristic
€y ~ STRAY CIRCUIT CAPACITANCE" R R7 =
1 ohm
€y ~ STRAY CIRCUIT CAPACITANCE" R R7 = 50000 OHMS, 1 WATT