EFF51

Twin RF pentode designed for push-pull ultra-short-wave amplification to approximately 500 MHz, providing two matched sections for VHF service.

Directly heatedCold cathodeCommon cathodeDissimilar

Description

Twin RF pentode for push-pull ultra-short-wave amplification up to 500 MHz.

General specifications

Properties common to every published source and operating point.

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

2 physical sections, each with unique specifications.

Section 1

X-ray radiationInterelectrode capacitances

Twin sections electrically identical; one representative section row per compression rule.

Section 2

X-ray radiationInterelectrode capacitances

Second identical physical pentode section; added to align rows with SectionCount.

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