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Voltage Tetrode ·Tetrode

7717

Sharp-cutoff tetrode for mobile-communications amplifier service, co-designated 7717/6CY5, providing VHF signal gain in compact communications equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 200 mA

Description

Sharp-cutoff tetrode for mobile-communications amplifier service; co-designated 7717/6CY5.

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
6.3 V
Nominal heater current
200 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

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
25000 Ω
Transconductance
0.007 S
Max plate voltage
300 V
Max screen voltage
150 V
Max plate dissipation
2.5 W
Max screen dissipation
0.75 W
Max cathode current
25 mA

Alias/co-designation of 6CY5;

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

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Heater voltage

    6.3 V

  • Heater current

    200 mA

  • Plate voltage

    125 V

    ClassA

  • Screen voltage

    80 V

    ClassA

  • Grid voltage

    -1 V

    ClassA

  • Plate current

    10 mA

    ClassA

  • Screen current

    1.4 mA

    ClassA

  • Maximum plate voltage

    180 V

  • Maximum screen voltage

    180 V

  • Maximum plate dissipation

    2 W

Characteristic

  • Plate resistance

    125000 ohm

    ClassA

  • Transconductance

    8000 uS

    ClassA

Capacitance

  • Grid-to-plate capacitance

    0.03 pF

  • Input capacitance

    4.4 pF

  • Output capacitance

    2.74 pF