TSP4

High-slope pentode designed for HF and IF amplification and for cathode-ray-tube modulation. Its substantial transconductance supports high-frequency signal gain and video-type modulation duties.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7
Base pins: 7
Nominal heater: 4 V / 1.3 A

Description

High-slope pentode for HF/IF amplification and cathode-ray-tube modulation.

Socket description

Medium 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B7
Base pins: 7
Nominal heater voltage: 4 V
Nominal heater current: 1.3 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

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.00473 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max cathode current: 20 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

Pentode

Characteristic

HeaterOrFilamentVoltage
4 V
HeaterOrFilamentCurrent
1.3 A
Transconductance
4730 uS
AmplificationFactorGrid1ToGrid2
6730
BiasResistance
260 ohm
Plate To Grid Capacitance
0.01 pF
Input Capacitance
9.6 pF
Output Capacitance
7.5 pF

Other

Plate Voltage
200 V
HFOrIFAmplifier
Screen Voltage
200 V
HFOrIFAmplifier
Grid Voltage
-2.5 V
HFOrIFAmplifier
Plate Current
8 mA
HFOrIFAmplifier
Screen Current
1.5 mA
HFOrIFAmplifier
MaxPlateVoltage
250 V
MaxScreenVoltage
250 V
MaxCathodeCurrent
20 mA