RCA Receiving Tube ManiJal
REMOTE·CUTOFF PENTODE Miniature type used in lightweight,
por-table, compact, battery-operated. receivers as combined detector and af voltage amplifier. Out-line 7B, OUTLINES SECTION. Tube requires miniature seven-contact socket. Filament volts (dc), 1.4; amperes, 0.05. For electrical charac-teristics, refer to type 1 U5. Type 1S5 is used principally for renewal purposes.
REMOTE·CUTOFF PENTODE Miniature type used in lightweight, por-table, compaet, battery-operated receivers as rf or if amplifier. Outline 7B, OUTLINES SEC-TION. Tube requires miniature seven-contaet socket. Filament volts (dc), 1.4; amperes, 0.05.
Characteristics as class Al amplifier: plate and grid-No.2 volts, 67.5 (90 mao;); grid-No.1 volts, 0; plate resistance (approx.), 0.25 megohm;
transconductance, 875 ,.mhos; plate ma., 3.4;
grid-No.2 ma., 1.5. This type is ueed princi-pally for renewal purposes.
BEAM POWER TUBE Glass octal type used in output stage of battery-operated receivers. Outline 14C, OUT-LINES SECTION. Tube requires octal socket.
Filament volts (de), 1.4; amperes, 0.05. Typical operation as class Al amplifier: plate and grid-No.2 volts, 90 (110 mao;) ; grid-No.1 volts, -6;
peak af No.1 volts, 6; plate ma., 6.5; grid-No.2 mao (zero-signal), 0.8; grid-grid-No.2 mao (maximum signal), 1.5; plate resistance, 0.25
154
155
1T4
115GT
megohm; transconductance, 1150 ,.mhos; load resistance, 14000 ohms; total harmonic distortion, 7.11 per cent; output watts, 0.17. This is a DISCONTINUED type listed for reference only.
,.
DIODE-SHARP·CUTOFF PENTODE Subminiature type used as combined de-tector and audio amplifier in small, compact, battery-operated receivers for the standard AMbroadcast band. Maximum dimensions: over-all
1 T 6
length, 1~75 inches; seated height, 1.5 inches;
diameter, 0.4 inch. Tube requires subminiature eight-contact socket. Filament volts (de), 1.25;
amperes, 0.04. Filament voltage should never exceed 1.6 volts. Typical operation of pentode
unit as class Al amplifier: plate and grid-No.2 volts, 67.5 mao;; grid-No.1 volts, 0; plate resistance (ap-prox.), 0.4 megohm; transconductance, 600 pmhos; plate ma., 1.6; grid-No.2 rna., 0.4; total cathode mao 2.0 mao;. Maximum diode plate ma., 0.25. This is a DISCONTINUED type listed for reference only:
95
RCA Receiving Tube Manual
SHARP-CUTOFF PENTODE Miniature type used as rf or if amplifier in .tages not controlled by avc in lightweight,
1 U 4
compact, portable, battery-operated equipment.Outline 7B, OUTLINES SECTION. Tube re-quires miniature seven-contact Bocket. Fila-ment volt. (dc) , 1.4; amperes, 0.06. Charac-teristics as class A. amplifier: plate and grid-N o.
2 volts, 90 (120 max); grid-No.1 volts, 0; plate resistance (approx.), 1 megohm;
transconduct-He
ance, 900 .umhos; plate rna., 1.6; grid-No.2 rna., 0.5. This type is used principally for renewal purposes.
lU5
DIODE-SHARP-CUTOFF PENTODE
Miniature type used in lightweight,
com-pact~ portable, battery-operated receivers as combined detector and af voltage amplifier.
Outline 7B, OUTLINES SECTION. Tube re-Quires miniature seven .. contact socket. Filament volts (dc), 1.4; amperes, 0.06. Characteristics of pentode unit as class A. amplifier: plate and grid-No.2 volts, 67.6 (100 max); grid-No.1 volts, 0; plate resistance (approx.), 0.6 megohm;
transconductance, 625 "mhos; plate ma., 1.6; grid-No.2 ma., 0.4. Maximum diode plate ma., 0.28 max.
This type is used principally for renewal purposes.
lv
HALF-WAVE VACUUM RECTIFIER Glass type used in ac/dc or automobile receivers. Maximum dimensions: over-all length, 4-3/16 inches; seated height, 3-9/16 inches; di-ameter, 1-9/16 inches. Tube requires four-con ..
tact socket. Heater volts (ac /dc), 6.3; am-peres, 0.3. Maximum ratings as half-wave recti-fier: peak inverse plate volts, 1000; peak plate ma., 270; peak heater-cathode volts, 500; dc output ma., 45. This type is used principally for renewal purposes.
HALF-WAVE VACUUM RECTIFIER Miniature type used in
high-volt-lV2
age, low-current applications such as the rectifier in high-voltage, pulse-op-erated voltage-doubling power suppliesfor kinescopes. The very low power p P required by the filament permits the use of a rectifier transformer having small size and light weight.
FILAMENT VOLTAGE (AC) ••••••••••••••••••••••• 0 . . . .
FILAMENT CURRENT ••••••..•••••••••••••••••••••••••••••••••••••••••••
DIRECT INTERELECTRODE CAPACITANCE:
Plate to Filament (Appro:..) ••••.•.•...••••••••••••••••.•••••.•••.•
0.625-0.3 0.8
volt ampere pf -Under no circumstances should the filament voltage be less than 0.626 volt or greater than 0.725 volt.
PULSED RECTIFIER
For operation in a 5ll5-iine, SO-frame Iyotem Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE* ••..•••••••••••••••••••••••••••••••••••
PEAK PLATE CURRENT •••••••••••••••••••••••••••••••••••••••••••.•••••
AVERAGE PLATE CURRENT .•••••••••••••••••••••.•••••••••••••••••••••••
8250-ma", 11 max 0.6 max
volt.
ma ma
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a 525-line 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds •
• The dc component must not exceed 7000 volts.
96
INSTALLATION AND APPLICATION
Type 1 V2 requires a miniature nine-contact socket and may be mounted in any position. The socket should be made of material having low leakage and should have adequate insulation between its filament and plate terminals to withstand the maximum peak inverse plate voltage. To provide the required insulation in miniature nine-contact sockets designed with a cylindrical center shield, itis necessary to remove the center shield. In addition, socket terminals 2, 3, 7, and 8 shall not be used. Socket terminal 6 may be used as a tie point for components at or near filament potential. Outline 8D, OUTLINES SECTION.
The filament is of the coated type and is designed for operation at 0.625 volt.
The filament windings on the pulse transformer should be adjusted to provide the rated voltage under average line-voltage conditions. When the filament voltage is measured, it is recommended that an rms voltmeter of the thermal type be used.
The meter and its leads must be insulated to withstand 15000 volts and the stray capacitances to ground should be minimized.
The high voltages at which the 1 V2 is operated are very dangerous. Great care should be taken to prevent coming in contact with these high voltages. Particular care against fatal shock should be taken in measuring the filament voltage in those circuits where the filament is not grounded. Precautions must include safeguards which definitely eliminate all hazards to personnel.
F
HALF-WAVE VACUUM RECTIFIER Miniature types used in high-volt-age, low-current applications such as the rectifier in a high-voltage, rf -op-erated powersupply, or as the rectifier of
IS IS high-voltage pulses produced in
tele-lX2A lX2.B
vision scanning systems. Outline 9A, OUTLINES SECTION. Tubes require min-iature nine-contact socket and may be mounted in any position. Socket terminals 3 and 7 may be used as tie points for components at or near filament potential. For high-voltage considerations, refer to type 1B3-GT. Type 1X2-A is used principally for renewal purposes.
FILAMENT VOLTAGE (AC). • • • . •.. .. ...• ••.. •. .•. •.. . .. •. .• .•• . •.••••.••• 1.25· volt.
FILAMENT CURRENT... 0.2 ampere DIRECT INTERELECTRODE CAPACITANCE:
PlatetoFilamentandInternaIShield(Approx.).. ...•.•• 1.0 pi
• Under no circumstances should the filament voltage be less tban 1.05 volts or greater than 1.45 volts.
Maximum Ratings:
PULSED RECTIFIER
For operation in a 5:e5-line, SO-frame Bllotem lX:e-A Design-Center
lX!-B De8ign-Maximum
Values PEAK INVERSE PLATE VOLTAGE- ... ..
PEAK PLATE CURRENT ... .
Value8#
20000tma., 45ma., 0.5ma..
22000 ma" volts 45 rna., rna ma AVERAGE PLATE CURRENT ... .. 0.0 rna., Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 7 rna... 100 t AbsoluteM aximum. Under no circumstances should this absolute value be exceeded.
# Except as noted.
- The de component must not exceed 16000 volts for lX2-A, 18000 volts for lX2-B.
~G'
$
~
r.POWER TRIODE
Glass type used in output stage of radio re-ceivers and amplifiers. Outline 28, OUTLINES SECTION. Tube requires four-contact socket.
Filament volts (ac Ide), 2.5; amperes, 2.5. Typi-cal operation as class Al amplifier: plate volts, 250 (300 max); grid volts, -45; plate ma., 60;
amplification factor, 4.2; load resistance, 800 ohms; transconductance, 5250 .umho!; plate dis-sipation, 15 max watts; load resistance, 2600
2A3
volts
97
RCA Receiving Tube Manual
ohms; power output, 3.5 watts. Typical operation as push-pull class AB, amplifier (values are for two t~be&): plate supply volts, 300; cathode-bias resistor, 780 ohms; peak af grid-to-grid volts, 156; zero-s,gnal plate ma., 80; maximum-signal plate rna., 100; effective load resistance (plate-to-plate), 5000 ohms; power output, 10 watts. This type is used principally for renewal purposes.
2A5
2A6
2A7
2AF4A 2AF4B
Related types:
3AF4A,6AF4A
POWER PENTODE
Glass type used in output stage of ac-oper-ated receivers. Outline 27, OUTLINES SEC-TION. Tube requires six-contact socket. Except for its heater rating (2.5 volts ac/dc; 1.75 amperes), the 2A5 has electrical characteristics identical with type 6F6. Type 2A5 is a DIS-CONTINUED type listed for reference only.
TWIN DIODE-HIGH-MU TRIODE
Glasa type used in ac-operated receivers chiefly as a combined detector, amplifier, and avc tube. Outline 24B, OUTLINES SECTION.
Tube requires I!ix-contact socket. Except for its heater rating (2.5 volts ac/dc; 0.8 ampere), and within its 250-volt maximum plate rating, the 2A6 has electrical characteristics identical with type 6SQ7. Type 2A6 is a DISCONTIN-UED type listed for reference only.
PENTA GRID CONVERTER
Glass type used in ac-operated receivero.
Outline 24B, OUTLINES SECTION. Tube re-quires Bmallseven-contact (0.75-inch, pin-circle diameter) socket. Except for its heater rating (2.5 volta ac/dc; 0.8 ampere) and its interelec-trode capacitances, the 2A 7 has electrical charac-teriBtics identical with type 6A8. Complete ohielding of this tube is generally necessary.
Type 2A7 is a DISCONTINUED type listed for reference only.
MEDIUM-MU TRIODE Miniature types used as local os-cillator in uhf television receivers em-ploying series-connected heater strings.
Outline 7A, OUTLINES SECTION.
Heater volts (ac/dc), 2.35; amperes,
W
G~ 4G,P 2 : : : ~
t.
I •
H H
~.
2 2 3 - - - 4 POI GT ~ .PT Ii
I 6
.H H
•
.. ~K
H 3 6
G 2 7
pi
0.6; warm-up time (average), 11 seconds. Type 2AF4-B only, maximum rating (design maximum), peak heater-cathode volts, 180 max. When the heater is posi-tive with respect to the cathode, the de component of the heater-cathode voltage must not exceed 100 volts. Typical operation of 2AF4-B as oscillator at 1000 Me:
plate rna., 17.5; grid I'a (approx.), 700. Except for heater ratings noted, these types are identical with miniature type 6AF4-A. Type 2AF4-A is a DISCONTIN-UED type listed for reference only.
HALF-WAVE VACUUM RECTIFIER 5
Duodecar type used to supply
2AH2
high voltage to the anode of picture tubes in television receivers. OutlineLC 4
16A,OUTLINESSECTION. Tubere- .
quires 12-contact socket and may be I<,JS,H II
mounted in any position. Socket terminals 2,3, 5, 6, 7, 8, 9, and 11 should not be used as tie points; terminals 4 and 10 may be used as tie points for components at or near cathode potential. For high-voltage and X-ray safety considerations, refer to type 1B3-GT. Heater volts (ac/dc), 2.5; amperes, 0.3.
98
\
========= Technical Data
========---PULSED RECTIFIER
Fo, ope,ation in a 5115-line, 80-frmn. SI/stem Maximum Ralings, (D",ign-Maximum Values):
PEAK INVERSE PLATE VOLTAGE- ••••.•••••••••••••••••••••••••••••••• ".
PEAK PLATE CURRENT .••••••••••••••••••••••••••••••••••••••••••••••
AVERAGE PLATE CURRENT ••••••••••••••••••••••••••••••••••••••••••• 4
Characteristics, I'nstantaneaus Value:
80000omtu:
80 max 1 . 6 _
volts ma ma Tube Voltage Drop for plate current of 7 ma... 100 volts -The duration of the voltage pulse must not exceed 16 per cent of one horizontal scanning cycle. In a 625-line, 30-frame system, 15 per cent of one borizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 24000 volts.
alC H,KHALF-WAVE VACUUM RECTIFIER
9 IS
Duodecar type used to supply high voltage to the anode of picture tubes in tslevision receivers. Outline 16B, OUTLINES SECTION. Tube
H,K,IS H requires duodecar twelve-contact
2AS2
socket and may be mounted in any position. Socket terminals 4, 7, and 10 may be used as tie points for components at or near heater potential. For high-voltage and X-ray safety considerations, refer to type 1B3-GT. Heater volts (ac/dc), 2.5;
amperes, 0.33.
PULSED RECTIFIER
Fo, ope,ation in a U5-line, SO-f,ame "1/8/em
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE D . . . . PEAK PLATE CURRENT ••••.•••••••••••••••••••••••••••••••••••••••••.•
AVERAGE PLATE CURRENT •••••..••.•••••••••••••••••••••••••••••••• _
Characteristics, Instantaneous Value:
80000·max 80 max 1.6mtu:
volts ma ma
Tube Voltage Drop for plate current of 7 ma. . . •• . • . . . • . . • • • . • • • 100 volts
D The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a 525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 24000 volts.
TWIN DIODE-REMOTE-CUTOFF PENTODE Glass type used as combined detector, ave tube, and amplifier. Outline 24B, OUTLINES SECTION. Tube requires small seven-contact (0.75-inch, pin-circle diameter) socket. EXcept for its heater rating (2.5 voltsac Idc; 0.8 ampere) and its interelectrode capacitances, the 2B7 has electrical characteristics identical with type 6BS-G. Type 2B7 is a DISCONTINUED type listed for reference only.
MEDIUM-MU TRIODE
Miniature types used as rf amplifier in vhf television tuners employing series-connected heater strings. Outline 7B, OUTLINES SEC-TION. Heater volts (ac Idc), !BN 4:2.3, ftBN 4-A:
2.35: amperes, 0.6; warm-up time (average), 11 seconds. Except for heater rating, these types are identical with miniature types 6BN4 and 6BN4A, respectively. Type 2BN4 is a DIS-CONTINUED type listed for reference only.
Type 2BN 4-A i. used principally for renewal purposes.
2B7
2BN4
2BN4A
Related type.:
3BN4A.6BN4A
99
2CW4
R_laled Iype.:
6CW4,13CW4