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Voltage - Triode (with diode, heptode or hexode) ·Heptode-Triode

UCH81

Triode-heptode frequency changer for AC/DC superheterodyne receivers. The triode serves as local oscillator while the heptode mixer provides useful conversion gain and high output resistance.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9C13
Socket code: B9A
Base pins: 9
Nominal heater: 19 V / 100 mA

Description

Triode-heptode frequency changer for radio receiver oscillator and mixer service. The supplied French datasheet was translated to English for descriptive output.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9C13
Socket code: B9A
Base pins: 9
Nominal heater voltage: 19 V
Nominal heater current: 100 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9C13 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Heptode

X-ray radiationInterelectrode capacitances

Plate resistance: 900000 Ω
Transconductance: 0.000775 S
Max plate voltage: 250 V
Max screen voltage: 100 V
Max plate dissipation: 1.7 W
Max screen dissipation: 1 W
Max cathode current: 12.55 mA

Published ratings and characteristics promoted from the approved source.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0037 S
Amplification factor: 22
Max plate voltage: 250 V
Max plate dissipation: 0.8 W
Max cathode current: 6.5 mA

Published ratings and characteristics promoted from the approved source.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1953 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Plate Voltage
170 V
Heptode
Plate Current
3.2 mA
Heptode
Screen Current
6.8 mA
Heptode grids 2+4

Characteristic

Conversion Transconductance
750 uS
Heptode

Capacitance

Input Capacitance
4.8 pF
Heptode cold
Output Capacitance
7.9 pF
Heptode cold
OscillatorGridCapacitance
6 pF
Heptode grid 3
Plate To Grid Capacitance
0.006 pF
Heptode maximum

SECTION 2

Triode

Other

Plate Voltage
100 V
Triode
Grid Voltage
-2 V
Triode
Plate Current
7.3 mA
Triode

Capacitance

Input Capacitance
2.6 pF
Triode
Output Capacitance
2.1 pF
Triode
Plate To Grid Capacitance
1 pF
Triode

Data set 02

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
250 V
Maximum Plate Dissipation
1.5 W
Maximum Screen Dissipation
1 W
Maximum Cathode Current
25 mA

Characteristic

Transconductance
775 µS
Typical
Plate Resistance
1000000 ohm
Typical

SECTION 2

Triode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Plate Dissipation
1.5 W
Maximum Cathode Current
15 mA

Characteristic

Transconductance
3800 µS
Typical
Amplification Factor
22
Typical
Plate Resistance
19000 ohm
Typical

Data set 03

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

Plate Current
7.6 mA
ConverterSection
Transconductance
2400 µS
ConverterSection
Plate Resistance
0.6 Mohm
ConverterSection

SECTION 2

Triode

Characteristic

Triode Plate Voltage
100 V
Triode Plate Current
13.5 mA
Triode Transconductance
3700 µS
Triode Amplification Factor
22

Data set 04

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

HeaterVoltageNominal
19 V
Nominal
HeaterCurrentNominal
100 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Screen Voltage
100 V

SECTION 2

Triode

Other

HeaterVoltageNominal
19 V
Nominal
HeaterCurrentNominal
100 mA
Nominal
Maximum Plate Voltage
250 V

Data set 05

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Heptode

Application

Application
Frequency changer / RF-IF amplifier

SECTION 2

Triode

Application

Application
Oscillator

Data set 06

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Plate voltage
170 V
FrequencyChanger
Screen voltage
102 V
FrequencyChanger
Plate current
6.2 mA
FrequencyChanger
Screen current
3.8 mA
FrequencyChanger

Characteristic

Plate resistance
0.9 Mohm
FrequencyChanger

SECTION 2

Triode

Other

Plate voltage
100 V
OscillatorSection
Plate current
13.5 mA
OscillatorSection

Characteristic

Amplification factor
22
OscillatorSection

Data set 07

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Va = Vb
200 V
OR I.F. AMPLIFIER
Vg
0 V
OR I.F. AMPLIFIER
V g
123 V
OR I.F. AMPLIFIER
gm
2.4 mA
OR I.F. AMPLIFIER
ra
600 kO
OR I.F. AMPLIFIER
Vg
1
OR I.F. AMPLIFIER
reduction in gm)
-33 V
OR I.F. AMPLIFIER
Vg
-1.3 V
OR I.F. AMPLIFIER
Vg3 max. (lg
3 V
OR I.F. AMPLIFIER
Va = Vb
200 V
FREQUENCY CHANGER
Vg1
-2.6 V
FREQUENCY CHANGER
Vg2+g4
119 V
FREQUENCY CHANGER
ra
1
FREQUENCY CHANGER
Vgl (for
1
FREQUENCY CHANGER
Vg2+g4( b) max
550 V
LIMITING VALUES
Vg2+g4 max. (Ia =
125 V
LIMITING VALUES
Vg2+g4 max. (la <
250 V
LIMITING VALUES
Req I Va =
200
LIMITING VALUES
Va =
200
LIMITING VALUES
Va t
0 V
LIMITING VALUES

SECTION 2

Triode

Characteristic

Va
100 V
CHARACTERISTICS
Vg
0 V
CHARACTERISTICS
gm
3.7 V
CHARACTERISTICS
Vg max. (Ig = +
3 V
CHARACTERISTICS

Other

gm (eff)
580 A
OSCILLATOR
Va max
250 V
LIMITING VALUES
SOmV fo r an o ut put of
50
LIMITING VALUES
Vg
3
LIMITING VALUES
Vg
0 V
LIMITING VALUES
Va =
11 V
LIMITING VALUES
7 16 1 UCH 81 Ia
81
LIMITING VALUES
i Va '"
170 V
LIMITING VALUES
Vg l (V )
0 V
LIMITING VALUES
Va =
200
LIMITING VALUES
Va =
170 V
LIMITING VALUES
Vg l( V )
0 V
LIMITING VALUES
<" A ) Va
170 A
LIMITING VALUES
Va =
0 V
LIMITING VALUES
Va =
170
OSCILLATOR-GR ID CURRENT.
va
0
OSCILLATOR-GR ID CURRENT.
Va =
200
OSCILLATOR-GRID CURRENT .

Data set 08

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

Tension filAment …………ecreresenseenceserencesesenensessenseursers VL
19 V
Courant filament … … Jlf
100 mA
Capacité anode/ grille ne ! … . Ca/g
6 mpF
Capacité grille no 1/ filament …… . CgJË
0.17 pF
Caäpacité grille n° 1/ grille n° 3 … Ca/& ,
3 pF
Capacité grille n° 3/ filament .………escereresciensene CB3/f
0.06 pF
Capacité grille/ filAment ………eseserenenennn C8/ Ë
0.02 pF
Capacité anode Heptode/ grille Triode …… CaH/ gT
0.09 pF
Capacité grille n° 1 Heptode/ anode Triode …… CgH/aT =—
0.06 pF
Capacité grille n° ! Heptode/ grille Triode …… CgH/geT —
0.17 pF
Tension d'anode à courant nul ……c | Va bl
550 V
Tension d'anode Va
250 V
T'ension de grilles n°2 et 4àcourant nul Vg+tg bl =
550 V
Tension de grilles n° 2 et 4 …… veate
125 V
la = 1 mA …… V&+e
250 V
Dissipation de grilles n° 2 et 4 ..... Pg+tg
1 W
Courant de cathode … .. . IK
18 mA
Tension entre filament et cathode ……s VÊK
100 V
Tension d'anode à courant nul …..….....……ccrerecess :Va bl
550 V
Tension d‘anode
250 V
Dissipation d'anode
0.8 W
Courant de cathode
6.5 mA
Tension entre filament et cathode
100 V

Capacitance

Capacité d'Entré@ …..….……vevriecrersentsneemsesnnsneneü Ce
4.8 pF
Capacité de sortie …… … Cs
7.9 pF
Capacité d'entrée …… . Ce
2.6 pF
Capacité de sortie …… . Cs
2.1 pF
Capacité anode/ grille …… …… Ca/g
1 pF
Capacité anode Heptode/anode Triode …… CaH/ aT
0.2 pF

Characteristic

Dissipation d'anode … vasssesesreemnmacesercee PA
1.8 W
Tension d'anode Va
160 V
Teñsion de grilles n° 2 et 4. Ve+tg
90 V
Tension de grille n° 1 Veg
-0.5 V
Courant d'anode la
9.8 mA
lg+g
6.1 mA
Pente …… S
4.3 mA
ensessen cn sess so00 sosoceansi en
100 V
Pente . …. R
3.7 mA
mA) Va: =
100 V

Data set 09

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

HeaterVoltageNominal
19 V
Nominal
HeaterCurrentNominal
100 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Screen Voltage
250 V
Maximum Plate Dissipation
1.8 W
Maximum Screen Dissipation
1 W
Maximum Cathode Current
18 mA

Characteristic

Transconductance
4300 µS
Typical
Amplification Factor
25
Typical
Plate Resistance
400000 ohm
Typical

SECTION 2

Triode

Other

HeaterVoltageNominal
19 V
Nominal
HeaterCurrentNominal
100 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Plate Dissipation
0.8 W
Maximum Cathode Current
6.5 mA

Characteristic

Amplification Factor
22
Typical

Data set 10

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristics

Heater or filament voltage
19 V
Published nominal value
Heater or filament current
100 mA
Published nominal value

Other

Maximum plate dissipation
1.7 W
Published maximum rating

SECTION 2

Triode

Characteristics

Heater or filament voltage
19 V
Published nominal value
Heater or filament current
100 mA
Published nominal value
Transconductance
3200 µS
Published operating characteristic

Other

Maximum plate dissipation
0.8 W
Published maximum rating

Data set 11

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

Heater voltage
19 V
SeriesHeater