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Power - Triode ·Triode

812ASPEC

Svetlana directly heated 812A medium-mu RF and audio power triode.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 4 A

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
4 A
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 0

Triode

X-ray radiationInterelectrode capacitances
Amplification factor
29
Max plate voltage
1250 V
Max plate dissipation
45 W
Max grid dissipation
7 W

CCS maximum 1250 V, 45 W; ICAS maximum 1500 V, 65 W; Class C and B service.

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

9999 Mixed C 1000

Published operating points and test conditions from this source.

SECTION 0

Triode

Other

  • Heater/filament voltage

    6.3 V

    Filament voltage

  • Heater/filament current

    4 A

    Filament current

  • Maximum plate voltage

    1250 V

    CCS maximum plate voltage