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The 10F1 is an early all glass screened amplifier pentode. The high impedance suggests applications with tuned circuits as anode loads, such as RF, or more likely due to the high gain, IF amplification in superhet radio, television or radar receivers.

The pins are located equi-spaced around the base circle and the metal skirt and spigot aid location. The pins are short and hard as was the case with some early all glass designs.

The outer screen, three grid supports and a heat radiating fin on top of the copper control grid supports.

Inside the screen, the anode is a pair of plates with a strap between.

The thin glass tube envelope is 20 mm in diameter and, excluding the B8A base pins, is 53 mm tall.

References: ³⁰⁰² & ¹⁰⁴⁰. Type 10F1 was first introduced in 1948. See also 1948 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶