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

ECH41

Compact triode-heptode frequency changer for superheterodyne receivers. The triode operates as local oscillator while the heptode performs mixing, combining both functions in one postwar receiver valve.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 230 mA

Description

ECH41 is described in the supplied Philips datasheet as a triode-hexode frequency changer. Published electrical ratings, characteristics and operating conditions were extracted from the supplied source.

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
230 mA
Parallel heater voltage
6.3 V
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
Max plate voltage
175 V

Published ratings, characteristics and operating conditions reviewed.

Section 2

Hexode

X-ray radiationInterelectrode capacitances
Max plate voltage
550 V

Published ratings, characteristics and operating conditions reviewed.

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

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    230 mA

    Published heater rating

Other

  • Triode maximum plate voltage

    175 V

    TriodeSection

  • Triode maximum plate dissipation

    0.9 W

    TriodeSection

  • Hexode maximum plate voltage

    300 V

    HexodeSection

  • Hexode maximum plate dissipation

    0.8 W

    HexodeSection

  • Hexode maximum screen voltage

    125 V

    HexodeSection

  • Oscillator triode plate current

    4.9 mA

    TriodeSection Oscillator

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heating VE

    6.3 V

    Published datasheet value

Capacitance

  • Cq

    6 pF

    Published datasheet value

  • Cq = 6,0 pF Ca

    1.5 pF

    Published datasheet value

  • Cg1

    3.4 pF

    Published datasheet value

  • Cg1 = 3,4 pF CeT+g3

    4.8 pF

    Published datasheet value

  • Cagt <

    0.1 pF

    Published datasheet value

  • Cagt < 0,1 pF C(gT+g3)a

    1.2 pF

    Published datasheet value

  • Cg1r <

    0.15 pF

    Published datasheet value

  • C(gT+g3)-gi <

    0.35 pF

    Published datasheet value

  • C(gT+g3)-al <

    0.2 pF

    Published datasheet value

Other

  • Vb'

    250 V

    Published datasheet value

  • Ia

    4.9 mA

    Published datasheet value

  • Vose

    8 V

    Published datasheet value

  • seff

    0.55 mA/V

    Published datasheet value

  • Va=Vp

    250 v

    Published datasheet value

  • IgT+g3

    350 v

    Published datasheet value

  • v -4 = -2

    -28 v

    Published datasheet value

  • Valiga = 105

    147 v

    Published datasheet value

  • Se = 500

    5 w

    Published datasheet value

  • Vao = max

    550 V

    Published datasheet value

  • Vao = max. 550 V T(g2+g4)o = max

    550 V

    Published datasheet value

  • Vg = max

    300 V

    Published datasheet value

  • Vg = max. 300 V Vg2o+gy = max

    125 V

    Published datasheet value

  • Wy = max

    0.8 W

    Published datasheet value

  • Wy = max. 0,8 W Wg2ega = max

    0.3 W

    Published datasheet value

  • Ty = max

    7 mA

    Published datasheet value

  • Ty = max. 7 mA Vg1 (Ig1=+

    0.3 µA

    Published datasheet value

  • Ty = max. 7 mA Vg1 (Ig1=+0,3uA) = max

    -1.3 V

    Published datasheet value

  • Rg3 = maX. 3 MR vkt = max

    100 V

    Published datasheet value

  • Yao = max

    550 V

    Published datasheet value

  • Yao = max. 550 V. Vg(Ig = +

    0.3 µA

    Published datasheet value

  • Yao = max. 550 V. Vg(Ig = +0,3 uA) max

    -1.3 V

    Published datasheet value

  • Va = max

    175 V

    Published datasheet value

  • Wo o= mux

    0.9 W

    Published datasheet value

  • e = max. 9,% ma Iyt = max

    100 V

    Published datasheet value