This section contains technical descriptions of RCA tubes used in standard broadcast, FM, and television receivers, in audio amplifiers, and in many other diverse applications. It includes data on current types, as well as information on those RCA discontinued types in which there may still be some interest. Unless otherwise specified, the ratings given are based on the Design Center system. Infor-mation on picture tubes is shown at the end of this section.
In choosing tube types for the design of new electronic equipment, the designer should refer to the APPLICATION GUIDE FOR RCA RECEIVING TUBES on pages 75 to 81.
Tube types are listed in this section according to the numerical-alphabetical-numerical sequence of their type designations. For Key: Basing Diagrams, see inside back cover.
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DIODE
Miniature type used as deteetor tube in portable FM receivers and in portable high-frequency measuring equipment. Outline 7B, OUTLINES SECTION. Tube requires minia-ture seven-contact socket. Heater volts (ael de), 1.4; amperes, 0.15. Maximum ratings for half-wave rectifier service: peak inverse plate volts, 330 max; peak plate rna, 5 max; de out-put rna., 0.6 max; peak heater-cathode volts, 140 max. This type is used principally for re-newal purposes.
REMOTE-CUTOFF PENTODE
Glass type used in battery-operated re-ceivers as rf or if amplifier. This type is similar electrically to type 1D5-GP. Outline 24B, OUT-LINES SECTION. Tube requires four-contact socket. Filament volts (dc), 2.0; amperes, 0.06.
Type 1A4-P is a DISCONTINUED type listed for reference only.
POWER PENTODE
Glass octal type used in output stage of bat.-tery-operated receivers. Outline 14C, OUT-LINES SECTION. This type may be supplied with pin No.1 omitted. Tube requires octal socket and may be mounted in any position. For filament considerations, refer to type 1U4. Filament volts (dc), 1.4; amperes, 0.05. Typical operation as class Al amplifier: plate and grid-No.2 volts, 90 (110 max); No.1 volts, -4.5; peak af
grid-lA3
lA4P
lA5GT
No.1 volts, 4.5; plate ma., 4.0; grid-No.2 ma., 1.1; plate resistance (approx.), 0.3 megohm; transcon_
ductance, 850 /Lmhos; load resistance, 25000 ohms; power output, 115 milliwatts. Type 1A5-GT i8 used principally for renewal purposes.
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lA6
R.CA Receiving Tube Manual
PENTAGRID CONVERTER GI ... type used in battery-operated reo eelvers. This type is identical electrically with type 1D7-G, except for interelectrode capaci-tances. Outline UB, OUTLINES SECTION.
Tube requires six-contact socket. Filament volts (de), 2.0: amperes, 0.06. Type 1A6 is a DISCON-TINUED type listed for reference only.
PENTAGRID CONVERTER
Glass octal type used in superheterodyne circuits having battery power supplies. Outline
1 A7GT
16A, OUTLINES SECTION. Tube requires oc-tal socket and may be mounted in any position.Filament volts (de), 1.4: amperes, 0.06. Typical operation as converter: plate and grid-N 0.2 volts, 90 (110 mao:); grids-No.S-and-No.6 supply volts, 110mao:;grids-No.8-and-No.6 volts, 46 (60mao:);
grid-No.4 volts, 0: grid-No.1 resistor, 0.2
meg-ohm;"late resistance (approx.), 0.6 megohm: plate ma., 0.6: grids-No.8-and-No.6 ma., 0.7: grid-No.2 ma., 1.2; grid-No.1 ma., 0.OS6: total cathode ma., 2.6 (4 mao:): conversion transconductance, 260 _mhos. This type is used principally for renewal purposes.
lACS
POWER PENTODE
Subminiature type used in output stage of small, compact, battery-operated receivers for the standard AM broadcast band. Maximum dimensions: over-all length, 1.76 inches: seated height, 1.6 inches; diameter, 0.4 inch. Tube re-quires subminiature eight-contact BOcket. Fila ..
ment volts (dc), 1.25: amperes, 0.04. Filament voltage should never exceed 1.6 volts. Typical operation as Class A. amplifier: plate and
grid-,.
Ne
No.2 volts, 67.5 mao:; grid-No.1 volts, -4.6; peak af grid-No.1 volts, 4.6; signal plate ma., 2; zero-signal grid-No.2 ma., 0.4: cathode ma., 4 mao:; plate resistance, 0.16 megohm; transconductance,760
"mhos; load resistance, 26000 ohms: total harmonic distortion, 10 per cent: maximum-signal power out-put, 60 milliwatts. This is a DISCONTINUED type listed for reference only.
HALF-WAVE VACUUM RECTIFIER Duodecar type used to supply
lAD2
power to the anode of the picture tube in television receivers. Outline 16A, OUTLINES SECTION. Tubere-LC
quires duodecar twelve-contact socket F, IS F
and may be mounted in any position. Socket terminals 4 and 10 may be used as tie points for components at or near filament potential. Filament volts (ac/dc), 1.25; amperes, 0.2.
PULSED RECTIFIER
For operation in a 61l6-line, SO-frame 81/8tem Maximum Ratings, (De8igft-Mao:imltm Values):
PEAK INVERSE PLATE VOLTAGE# ••••••••••••••••••••••••••••••••••••••
PEAK PLATE CURRENT . . . ..
AVERAGE PLATE CUBBENT ••••••••••••••••••••••••••••••••••••••••••.•
Characteristics, Instantaneous Value.
26000."...., 60 mao:
0.6 mao:
volts ma ma Tube Voltage Drop for plate current of 7 ma •• ~ •••• '" •••••••••••• '" •• 226 volts
# The duration of the volIfage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a 626-line, SO-frame system, 16 per cent of one horizontalseanning cycle is 10 microseconds.
• The dc component.must not exceed 22000 volts.
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========= Technical Data =========
SHARP-CUTOFF PENTODE Subminiature type used al rf or if amplifier In stagea not controlled by ave In omall, com-pact, battery-operated receivers for the
stand-ard AM broadeaat band. Maximum dimenslona:
1 AD 5
over-a1l length, 1.75 inchea; seated height, 1.5 Inchea; diameter, 0.4 inch. Tube requirea lub-miniature elght-eontaet socket. Filament volts (de), 1.25; amperes, 0.04. Filament voltage N should never exceed 1.6 volts. Characteriatiea
as cla .. AI amplifier: plats and grid-No.2 volts, 67.5 maa:: grid-No.1 volts, 0; plate resistance, 0.7 meg-ohm; transconductance, 785 "mhos; total cathode ma., 4 maa:: plate ma.,l.85; grid-No.2 ma., 0.75. This is a DISCONTINUED type listed for reference only.
HALF-WAVE VACUUM RECTIFIER
Miniature type used al rectifier of high-voltage pulses produced In the scanning aysteml of television receivers. Outline 9A, OUTLINES
SECTION. Tube requirea miniature nine-eon-
1 AX2
taet locket. Socket termlnall 8 and 7 may be connected to the filament, or used al tie points forthefllament-dropplngresistor;otherwisethey should not be used. Filament volts (ae), 1.4;
ampere&, 0.65. Maximum ratings as pulsed
rec-tifier in 525-line, SO-frame system: peak inverse plate volts (absolute maa:imum), 25000 _ (de 20000 maa:); peak plate ma., 11 _ : average plate ma., 1 _ . For filament and high-voltage considerations, refer to type 1B3-GT. Type 1AX2 il uaed principally for renewal purpolel.
HALF-WAVE VACUUM RECTIFIER Glass octal type used in high-voltage, low-current applications such as the rectifier in a high-voltage, rf-operated power supply or as a rectifier of high-voltage pulses produced in television scanning systems,
lB3GT
FILAMENT VOLTAGE (AC/DC). • • • •••••••••••••••••••••••••••••••••••••• 1.25" volt.
FILAMENT CURRENT... 0.2 ampere DIRECT INTERELECTRODE CAPACITANCE (Approx.):
Plate to Filament and Internal Shield. • • • • • . • • • • • . • • • • • • • • • • • • • • • • • • 1. 8 pf .. Under DO circum.tan ... should the filament voltage be less than 1.05 volts or IIreater than 1.45 volt ..
PULSED RECTIFIER
For operation in a 6'6-1in., 'D-fram.
81/"_
Maximum Ratings, (D .. ign-Maa:imum Valu .. ):
PEAIC INVERSE PLATE VOLTAGE· ••..•••••••••••••••••••••••• " •••• •• ••• 26000·mC121 volts PEAK PLATE CURRENT. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 50 maz ma AVERAGEPLATECURRENT... 0 . 5 _ ma Characteristics, Instantaneaus Value.
Tube Voltage Drop for plate current of 7 ma ••••••••••••••••••••••••.• _ 100 volts RADIO-FREQUENCY RECTIFIER
Maximum Ratings, (Design-M=mum Valu .. ):
PEAIC INVERSE PLATE VOLTAGE.. •• •• .• •• •• •• •• •• •• •••• •• •••• •••• ••••• 88000 maz volt.
PEAIC PLATE CUBBIINT... 85 _ ma AVERAGE PLATE CURRENT... •••••• •••••• •••••• ••••••••••••• 1 . 1 _ ma FREQUENCY RANGE 0" SUPPLY VOLTAGE... 1.5 to 100 Kc
• The duration of the voltage pulee must not exceed 15 per cent of one horizontal lcanning cYcle. In a 52S-line, 80-frame system, 15 per cent of one horizontal scanning cYcle is 10 mlcroaeconds.
• The de component must not exceed 22000 volt..
INSTALLATION AND APPLICATION
Type lB3-GT requires an octal socket and may be mounted in any position.
Plate connection is cap at top of bulb. Socket terminals I, 3, 4, 5, 6, and 8 may be connected to socket terminal 7 or to a corona shield which is connected to socket terminal 7. Socket terminals 4 and 6 may be 'used as tie points for components at or near filament potential. This type may be supplied with pins I, 4, and/or 6 omitted. Outline 15D, OUTLINES SECTION.
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