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

ECH2

Early triode-hexode frequency changer for superheterodyne reception. The triode serves as local oscillator while the multi-grid section performs frequency conversion with useful isolation between signal and oscillator circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 950 mA

Description

Triode-heptode/hexode frequency-converter tube for oscillator, mixer, and amplifier service. The supplied manufacturer datasheet provides heater data, electrical characteristics, ratings, capacitances, operating conditions, and application information where published.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
950 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

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

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0055 S
Amplification factor
17.5
Max plate voltage
125 V
Max plate dissipation
1 W

Published ratings and characteristics extracted from supplied datasheet. Philips ECH2 oscillator-triode section. Typical oscillator characteristics at 100 V anode voltage, zero grid bias and no oscillation: transconductance 5.5 mA/V and amplification factor 17.5. The second physical section is a heptode frequency converter; section-specific ratings must not be conflated.

Section 2

Heptode

X-ray radiationInterelectrode capacitances
Max plate voltage
300 V
Max screen voltage
125 V
Max plate dissipation
1 W
Max screen dissipation
0.5 W
Max cathode current
25 mA

Published ratings and characteristics extracted from supplied datasheet.

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • tung Vf

    6.3 V

    Published datasheet value

  • denteil CaT-gIH <

    0.06 pF

    Published datasheet value

Capacitance

  • Capacites entre les parties heptode it triode CaT-al

    0.9 pF

    Published datasheet value

  • section CgT-g1H

    0.16 pF

    Published datasheet value

  • Kapazitäten des Heptodenteiles CaH-g1H O

    0.015 pF

    Published datasheet value

  • Capacites de Is partie heptode Cg1H

    8.4 pF

    Published datasheet value

  • Capacities of the heptode section Call

    13.8 pF

    Published datasheet value

  • Kapazitäten des Triodenteiles CaT-8T

    3.4 pF

    Published datasheet value

  • Capacites de Is partie triode CST

    17 pF

    Published datasheet value

  • Capacities of the triode section CaTk

    3.5 pF

    Published datasheet value

Other

  • Va

    250 V

    Published datasheet value

  • Vg2 4

    100 V

    Published datasheet value

  • Vg3 (Vosc)

    8 V

    Published datasheet value

  • Ig3

    200 µA

    Published datasheet value

  • Vgl

    -2.5 V

    Published datasheet value

  • Vgl -2,5 Vt) .251')

    -34 V

    Published datasheet value

  • Is 3

    25 mA

    Published datasheet value

  • Ig2}Ig4

    6 mA

    Published datasheet value

  • Sc

    750 µA

    Published datasheet value

  • Sc 750 µA/V

    7 µA

    Published datasheet value

  • Sc 750 µA/V 7 µA[V

    2 µA

    Published datasheet value

  • Va

    100 V

    Published datasheet value

  • Is (Rg3 = 50.000 32. Vosc

    8 V

    Published datasheet value

  • Is (Rg3 = 50.000 32. Vosc = 8 V(eff))

    9.5 mA

    Published datasheet value

  • Ia (Vg

    0 V

    Published datasheet value

  • Ia (Vg 0 V, Vosc

    0 V

    Published datasheet value

  • Ia (Vg 0 V, Vosc = 0 V)

    24 mA

    Published datasheet value

  • S (Vg

    0 V

    Published datasheet value

  • S (Vg = 0 V, Voso

    0 V

    Published datasheet value

  • S (Vg = 0 V, Voso = 0 V)

    5.5 mA/V

    Published datasheet value

  • µ (Vg S

    0 V

    Published datasheet value

  • µ (Vg S 0 V. Vosc

    0 V

    Published datasheet value

  • VFaHo max

    550 V

    Published datasheet value

  • VaH max

    300 V

    Published datasheet value

  • Wal max

    1 W

    Published datasheet value

  • Vg2,4o max

    550 V

    Published datasheet value

  • Vg

    2.4 ma

    Published datasheet value

  • Vg2,4 max

    125 V

    Published datasheet value

  • Wg

    2.4 ma

    Published datasheet value

  • Wg2,4 max

    0.5 W

    Published datasheet value

  • Ig2 } 3g4 (V02,4

    100 V

    Published datasheet value

  • Ig2 } 3g4 (V02,4 = 100 V, Vgl

    -2.5 V

    Published datasheet value

  • Vg3(Vosc)

    8 V

    Published datasheet value

  • Vg3(Vosc) = 8 V(eff), Rg3 = 50.000 Cl). max

    7.5 mA

    Published datasheet value

  • Ig`3 ± I.g4 (Vg2,4

    100 V

    Published datasheet value

  • Ig`3 ± I.g4 (Vg2,4 100 V, Vgl _ _

    2.5 V

    Published datasheet value

  • Vg3(Voec)

    8 V

    Published datasheet value

  • Vg3(Voec) = 8 V(eff). Rg3 — 50.000 (3) . . min

    4.5 mA

    Published datasheet value

  • Vgl (Igl = ±0,3 ;&A) tnax

    -1.3 V

    Published datasheet value

  • Vgl (Ig3 ±0,3 p,A) max

    -1.3 V

    Published datasheet value

  • Ik max

    25 mA

    Published datasheet value

  • Vfk max

    50 V

    Published datasheet value

  • VaTe . . max

    550 V

    Published datasheet value

  • VaT max

    125 V

    Published datasheet value

  • WaT . _ . . . . max

    1 W

    Published datasheet value

  • VgT (IgT = ±0,3 ,iA) max

    -1.3 V

    Published datasheet value

  • Va

    250 V

    Published datasheet value

  • 2,5

    1000 V

    Published datasheet value

  • 2,5 1000 Vga,a

    100 V

    Published datasheet value

  • Vgi = —

    2.5 V

    Published datasheet value

  • 0 5 10

    15 V

    Published datasheet value