4215A A5 Mullard Wecovalve – 4215A Wecovalve – H12 Osram – Hivac XL

Description

This section is about what it was called ‘peanut valves”

The Western Electric ‘Weco’ valve was distributed in the UK with the prefix 4 as in this example of valves.

They were used in small sets or hearing aids as such.

This 4215A is fitted with a British B4 base whereas the Wecovalve had a miniature pea-nut base that fitted into a small bayonet base you can see the example here.

H12 by Osram is intended for the early stages of deaf aid amplifiers;

The Hivac XL is a radio receiving midget triode.