6DR4

High-mu miniature triode designed for voltage amplifiers, phase inverters, and other circuits requiring substantial voltage gain.

Directly heatedCold cathodeCommon cathodeDissimilar

Description

The 6DR4 is a 7-pin miniature high-mu triode intended for voltage amplifiers, phase inverters, and other high-voltage-gain applications.

Miniature 7-contact

General specifications

Properties common to every published source and operating point.

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1P	A	P — Plate (Anode) Original EIA label P; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 127, 6BG
PIN2IC	—	IC Original EIA label IC; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 127, 6BG
PIN3H	—	H — Heater Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BG
PIN4H	—	H — Heater Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BG
PIN5P	A	P — Plate (Anode) Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BG
PIN6G1	A	G1 — Control Grid Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BG
PIN7K	A	K — Cathode Chart transcription; manufacturer cross-check pending	Unverified EIA Base Connections, printed page 127, 6BG

1 physical section, each with unique specifications.

Section 1

X-ray radiationInterelectrode capacitances

High-mu triode; typical promoted values at 250 V plate.

Source-dependent data

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

Published operating points and test conditions from this source.

SECTION 1