2DY4A

A-series high-efficiency strap-frame-grid UHF oscillator triode, designed for low heater power, long life, and high stability.

Directly heatedCold cathodeCommon cathodeDissimilar

Description

High-efficiency high-gm medium-mu strap-frame-grid UHF oscillator triode; A-series version of the DY4 family with a different bulb size.

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) Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN2G1	A	G1 — Control Grid Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN3H	—	H — Heater Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN4H	—	H — Heater Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN5K	A	K — Cathode Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN6G1	A	G1 — Control Grid Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN7P	A	P — Plate (Anode) Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7DK

1 physical section, each with unique specifications.

Section 1

X-ray radiationInterelectrode capacitances

Published ratings and characteristics promoted from the approved source.

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