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7733

Wideband pentode amplifier designed as a high-reliability replacement for 12BY7 and 12BY7A. It combines broadband signal amplification with enhanced reliability for professional electronic equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: E9-1 / 9BF
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 600 mA

Description

Wideband pentode amplifier; high-reliability replacement for 12BY7/12BY7A.

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: E9-1 / 9BF
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

E9-1 / 9BF - 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 90000 Ω
Transconductance: 0.012 S
Max plate voltage: 330 V
Max screen voltage: 190 V
Max plate dissipation: 6.5 W
Max screen dissipation: 1.2 W

Wideband pentode.

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

1960 CBS Hytron

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Grid-to-plate capacitance maximum
0.063 pF
Input capacitance
10.7 pF
Output capacitance
4 pF

Other

Plate voltage
250 V
ClassA
Screen-grid voltage
180 V
ClassA
Cathode bias resistor
100 Ohm
ClassA

Characteristics

Plate current
24 mA
Screen-grid current
5 mA
Amplification factor g1-g2
31.5 ratio