6049

Premium subminiature semi-remote-cutoff RF pentode designed for UHF amplification under severe shock, vibration and elevated-temperature conditions. Sylvania specifies long-life, stable performance and ruggedized construction.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8DL
Socket code: B8D
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

Premium subminiature sharp-cutoff pentode for UHF service.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8DL
Socket code: B8D
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8DL - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN2G3	A	G3 — Suppressor GridGroup 8DL2 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN2K	A	K — CathodeGroup 8DL2 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN3H	—	H — Heater EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN4G3	A	G3 — Suppressor GridGroup 8DL4 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN4K	A	K — CathodeGroup 8DL4 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN5P	A	P — Plate (Anode) EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN6H	—	H — Heater EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN7G2	A	G2 — Screen Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN8G3	A	G3 — Suppressor GridGroup 8DL8 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN8K	A	K — CathodeGroup 8DL8 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 400000 Ω
Transconductance: 0.00355 S
Max plate voltage: 165 V
Max screen voltage: 155 V
Max plate dissipation: 1.1 W
Max screen dissipation: 0.55 W
Max cathode current: 16.5 mA

Sylvania 6049 subminiature semi-remote-cutoff UHF RF pentode, not sharp-cutoff; rugged 8DL eight-flexible-lead E8-10 base for impact/vibration/high-temperature service. Heater 6.3 V 150 mA. Absolute maximums: plate 165 V, screen 155 V, plate dissipation 1.1 W, screen dissipation 0.55 W and cathode current 16.5 mA. Typical at Va 100 V, screen 100 V and cathode resistor 150 ohms: Ia 7.5 mA, Ig2 2.5 mA, transconductance 3550 µmhos (0.00355 S), approximate plate resistance 0.4 MΩ. Shielded capacitances grid-to-plate 0.009 pF max, input 3.6 pF, output 3.8 pF. Manufacturer environmental limits include shock 450g, sustained vibration 2.5g and bulb hottest point 300°C; stabilize rated heater voltage to ensure service life. Characteristic values are typical, not maxima.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Heater Voltage
6.3 V
Heater Current
150 mA