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Voltage - Dual Triode (similar high frequency) ·Triode-Triode

HCC85

Miniature dual triode for RF-amplifier and oscillator-mixer circuits in FM and AM radio receivers, integrating front-end amplification and frequency conversion.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
17.5 V / 160 mA

Description

Miniature type used in rf-amplifier and oscillator- mixer circuits in FM and AM radio receivers. Outlines section, 6B; requires miniature 9-contact socket.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
17.5 V
Nominal heater current
160 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
0.0058 S
Amplification factor
48
Max plate voltage
250 V
Max plate dissipation
2.5 W

Promoted from published ratings/characteristics where directly applicable; additional published values retained in TUBE_SECTION_PARAMETER.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0058 S
Amplification factor
48
Max plate voltage
250 V
Max plate dissipation
2.5 W

Second physical triode section; added to align rows with SectionCount.

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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    17.5 volts

    Published value from supplied target entry

  • Heater Current

    0.16 ampere

    Published value from supplied target entry

  • Plate Voltage

    250 volts

    Published value from supplied target entry

  • Grid- Voltage, Negative-bias Value

    100 volts

    Published value from supplied target entry

  • Cathode Current

    15 mA

    Published value from supplied target entry

  • Plate Dissipation

    2.5 watts

    Published value from supplied target entry

  • Plate Voltage

    200 volts

    Published value from supplied target entry

  • Grid Voltage

    -2.1 volts

    Published value from supplied target entry

  • Amplification Factor

    48

    Published value from supplied target entry

  • Transconductance

    5800

    Published value from supplied target entry

  • Plate Current

    10 mA

    Published value from supplied target entry

Other

  • Peak Heater-Cathode Voltage ±

    90 volts

    Published value from supplied target entry

Capacitance

  • Plate to Grid (Each Unit)

    1.5 PF

    Published value from supplied target entry

  • Plate to Cathode (Each Unit)

    0.18 PF

    Published value from supplied target entry

  • Plate to Cathode, Heater, and Internal Shield (Each Unit)

    1.2 PF

    Published value from supplied target entry

  • Grid to Cathode, Heater, and Internal Shield (Each Unit)

    3 PF

    Published value from supplied target entry