8930

Rugged radial-beam power tetrode with enlarged anode radiator, capable of operation to about 500 MHz and approximately 350 W Class-AB output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: B8-236
Socket code: -
Base pins: 9
Nominal heater: 6 V / 2.6 A

Description

Rugged high-perveance radial-beam power tetrode; electrically identical to 7589W/4CX250R but with larger anode radiator.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: B8-236
Socket code: -
Base pins: 9
Nominal heater voltage: 6 V
Nominal heater current: 2.6 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

B8-236 - 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

Amplification factor: 5
Max plate voltage: 2400 V
Max screen voltage: 500 V
Max plate dissipation: 350 W
Max screen dissipation: 12 W
Max grid dissipation: 2 W

Promoted values are taken from printed General Characteristics / Maximum Ratings. Additional published conditions and operating data are preserved in parameters.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Capacitance

Input Capacitance
17.5 pF
Output Capacitance
4.9 pF
Feedback Capacitance
0.04 pF

Other

Frequency Maximum
500 MHz
Maximum DC Plate Current
250 mA
Typical Plate Voltage
2000 V
ClassAB1
Typical Screen Voltage
350 V
ClassAB1
Typical Single-Tone Useful Output Power
350 W
ClassAB1
Typical Audio Push-Pull Output Power
595 W
ClassAB1;PushPull;TwoTubes