TY3250

Directly heated all-glass VHF power triode for radio-frequency generation and amplification. Approximately 250 W plate dissipation and high transconductance provide compact VHF transmitter power.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5 V / 14 A

Description

All-glass VHF power triode rated for about 250 W anode dissipation.

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: 5 V
Nominal heater current: 14 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 1

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.05 S
Amplification factor: 25
Max plate voltage: 3000 V
Max plate dissipation: 250 W
Max grid dissipation: 30 W
Max cathode current: 480 mA

Promoted from published Mullard absolute-maximum/limiting-value and characteristic tables; service-specific limits retained in parameter rows.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

HeaterOrFilamentVoltage
5 V
HeaterOrFilamentCurrent
14 A
Input Capacitance
7 pF
Grid To Plate Capacitance
5.3 pF
Transconductance
50 mA/V
Amplification Factor
25
MaximumOperatingFrequency
100 MHz

Other

MaxPlateVoltage
3 kV
MaxPlateDissipation
250 W
MaxGridDissipation
30 W
MaxCathodeCurrent
480 mA
PeakCathodeCurrentMaximum
3 A
Frequency
100 MHz
ClassC
Plate Voltage
3 kV
ClassC
Grid Voltage
-250 V
ClassC
Plate Current
365 mA
ClassC
Grid Current
69 mA
ClassC
Plate Dissipation
250 W
ClassC
Power Output
845 W
ClassC
Efficiency
77 %
ClassC