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EC158

Power-capable triode intended for amplifier or driver service. Manufacturer data support moderate-current operation and useful dissipation, but do not justify assignment to the large transmitting or specialized regulator families.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8C18
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 850 mA

Description

EC158 is listed in the supplied Amperex material as a microwave triode. Published operating conditions and electrical characteristics were captured from the supplied tables.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8C18
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 850 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8C18 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.005 S
Amplification factor: 30
Max plate voltage: 300 V
Max plate dissipation: 30 W
Max cathode current: 170 mA

Triode section; values semantically promoted from published characteristics/maximum-ratings tables where present.

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

Triode

Other

(4 000 MHz)
0 MHz
Triode
Crmaxas 7/8"_32NS _ 2A
2 A
Triode
D SUF flANCS .1 0000n s es e e en es en e es ds d 4 A n a Ac en e A s006 |(
4 A
Triode
8 min a fond de filets
2220500 a
Triode
N.B. — Le tube EC 158 a exactement la meme disposition des electrodes et
158 a
Triode
Tension de l'anode
180 V
Triode
Courant anodique
140 mA
Triode
Tension de la grille
42 V
Triode
Pente
5 mA/V
Triode
Tension de chauffage
63 V
Triode
0 0mn ec u0000 Vao
500 V
Triode
Tension de l'anode
300 V
Triode
Puissance dissipee sur l'anode
30 W
Triode
Puissance d'entree (f
2 W
Triode
Puissance dissipee sur la grille
350 mW
Triode
Courant cathodique
170 mA
Triode
Courant de la grille
25 mA
Triode
Tension negative de la grille
50 V
Triode
Tension positive de la grille
10 V
Triode
Tension entre cathode et filament
50 V
Triode
filament
20 kohm
Triode
Temperature du scellement anodique. 0a
0 a
Triode
Tension negative de la grille (crete). . —Vgp
100 V
Triode
Tension positive de la grille (crete)
30 V
Triode
(4 000 MHz)
0 MHz
Triode

Characteristic

Indirect (cathode isolee du filament) ( Vf
6.3 V
Triode
Alimentation en parallele. | 1If
900 mA
Triode
(3) Valeur minimale Ps min
45 W
Triode
(4 000 MHz)
0 MHz
Triode

Capacitance

Capacite anode-cathode
36 mpF
Triode
Capacite grille-cathode
35 pF
Triode
Capacite anode-grille
1.7 pF
Triode
(4000 MHz)
4000 MHz
Triode
Tension de l'alimentation anodique
200 V
Triode
Tension d'alimentation de la grille
20 V
Triode
Courant anodique
140 mA
Triode
Largeur de bande (a — 0,1 dB)
50 MHz
Triode
puissance de 6 dB
53 W
Triode
Gain de puissance (P entree
10 mW
Triode

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
850 mA
Published heater rating
Amplification factor
30
MicrowaveTriode
Transconductance
25000 µS
MicrowaveTriode
Power gain
8 dB
At 4000 MHz
Power gain
12 dB
At 4000 MHz

Other

Maximum plate dissipation
30 W
MicrowaveTriode
Plate voltage
180 V
MicrowaveTriode
Plate current
140 mA
MicrowaveTriode
Power output
5 W
At 4000 MHz
Power output
2 W
At 4000 MHz

Data set 03

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Anode voltage
180 V
MicrowaveAmplifier
Anode current
60 mA
MicrowaveAmplifier
Grid bias
-3.5 V
MicrowaveAmplifier
Operating frequency
4200 MHz
GroundedGrid;Broadband
Anode supply voltage
200 V
GroundedGrid;Broadband
Grid supply voltage
20 V
GroundedGrid;Broadband
Anode current
140 mA
GroundedGrid;Broadband
Bandwidth
50 MHz
GroundedGrid;Broadband
Output power at 6 dB gain
5.3 W
GroundedGrid;Broadband
Gain at 10 mW driving power
11.5 dB
GroundedGrid;Broadband
Grid current maximum
25 mA
Section1
Grid dissipation maximum
0.35 W
Section1
Driving power maximum
2 W
GroundedGrid;4200MHz

Characteristic

Transconductance
22000 µS
Section1
Amplification factor
30
Section1

Capacitance

Anode-to-grid capacitance
1.7 pF
Section1
Anode-to-cathode capacitance
0.036 pF
Section1
Grid-to-cathode capacitance
3.5 pF
Section1

Data set 04

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Typical anode voltage
180 V
Typical anode current
60 mA
Grid dissipation maximum
0.35 W