YL1260

High-slope shadow-grid power pentode for transmitter finals, broadband/video amplifiers, audio power stages, and regulated supplies.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 12.6 V / 2.5 A

Description

The Telefunken YL1260 is a high-slope shadow-grid power pentode for transmitter finals, broadband and video amplifiers, AF power amplifiers, and regulated supplies.

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: 12.6 V
Nominal heater current: 2.5 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

Plate resistance: 5500 Ω
Transconductance: 0.045 S
Max plate voltage: 1500 V
Max screen voltage: 400 V
Max plate dissipation: 250 W
Max screen dissipation: 15 W
Max grid dissipation: 0.2 W
Max cathode current: 800 mA

High-power shadow-grid 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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Plate Voltage
600 V
Screen Voltage
225 V
Plate Current
400 mA
Transconductance
45000 uS
Plate Resistance
5500 ohm

Other

Power Output
220 W
ClassAB; SSB; 20MHz
Peak Plate Voltage
3500 V
Maximum Cathode Peak Current
2.5 A