ZD8XA

Forced-air-cooled modulating power triode for Class A or Class B low- and high-frequency amplification. Approximately 8 kW anode dissipation and 12 kV capability support major professional amplifier and modulator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Forced-air-cooled modulating triode with 8 kW anode dissipation for Class A or B low- and high-frequency power amplification up to 20 MHz.

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: -
Nominal heater current: -
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

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Max plate voltage: 12000 V
Max plate dissipation: 8000 W
Max cathode current: 1.5 A

Semantically matched promoted fields only.

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

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum Plate Dissipation
8000 W
Maximum Frequency
20 MHz

Data set 02

1966 Tesla Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Uf
16 to 18.6 V
If
68 A to 76 A
Ua (f
3 Mc/s
f < 3 Mc/s
Ua (f < 3 Mc/s) max.
12 kV
f < 3 Mc/s
Ua (f
20 Mc/s
f < 20 Mc/s
Ua (f < 20 Mc/s) max.
10 kV
f < 20 Mc/s
Wa max.
8 kW
Published value
1 a
la max.
1.5 A
f max.
20 Mc/s
OXJ
1 A

Capacitance

Cg/k
26.8 pF
Ca/k
2.6 pF
Ca/g
25.5 pF

Characteristic

le
7 A