DH107

Double-diode high-mu triode for receiver detector and low-frequency voltage-amplifier service. Two diodes provide detection and related rectification while the triode supplies useful small-signal gain for the recovered audio signal.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 100 mA

Description

The Marconi DH107 is a miniature indirectly heated double-diode-triode for detector and low-frequency amplifier service.

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: 100 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

3 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 58000 Ω
Transconductance: 0.0012 S
Amplification factor: 70
Max plate voltage: 250 V

Triode section. Diode ratings and capacitances are retained in parameters because only one representative technical section row is emitted in this compact extraction.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical diode section added during approved section-structure reconciliation.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical diode section added during approved section-structure reconciliation.

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater current
100 mA
Triode maximum plate voltage
250 V
TriodeSection

Characteristic

Triode amplification factor
70
TriodeSection
Triode transconductance
1200 uS
TriodeSection
Triode plate resistance
58000 ohm
TriodeSection

Construction

Physical diode count
2
Physical triode count
1