R Moorhead balloon top pip - Edlon Type HVL top pip - D3HF Mullard brass base - Mullard ORA M - Osram GEC R metal base - Osram DER top pip

R Moorhead balloon top pip – Edlon Type HVL top pip – D3HF Mullard brass base – Mullard ORA M – Osram GEC R metal base – Osram DER top pip

Edlon type HVL metal base balloon top pip boxed £ 200

Mullard D3HF dull emitter original box £ 120

ORA type M bright emitter Oscillator, Rectifier, and Amplifier £ 150

Osram GEC balloon type R on glass top pip £ 250

Moorhead US made balloon type R brass base £ 250

Osram D.E.R. Dull Emitter Receiving top pip original box £ 175

Description

This section shows six interesting valves dated from 1920s onward.

from left:

Edlon type HVL metal base balloon top pip boxed.

Mullard D3HF dull emitter original box.

ORA type M bright emitter Oscillator, Rectifier, and Amplifier.

Osram GEC balloon type R on glass top pip.

Moorhead US made balloon type R brass base.

Osram D.E.R. Dull Emitter Receiving top pip original box.

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