EL84 Tungsram 6BQ5 UK made Mullard code on glass km1 with original boxes

Description

The Tungsram EL84 is basically a Mullard EL84 in the miniature all-glass range having a single-ended construction and a B9A noval base.
With the maximum anode dissipation rating of 12 watts and a mutual conductance of over 11 mA/V a signal of very small amplitude is sufficient for full drive an amplifier. The Mullard EL84 GEC (N709) has been designed to satisfy demands in high fidelity in amplifier or receiver operation. To meet the requirements for high fidelity it is desirable to increase the available audio output power from the amplifier and hence decrease the distortion present at a given output, this is what the EL84 does.
This section shows various type of UK made EL84

The Tungsram /Mullard you see here have been tested at 6.3 Volts filament with both Anode and Screen at 250 Volts and negative grid of 7.3.

Four Tungsram EL84 code on glass km1

Tungsram EL84 6BQ5 have been tested with AVO 163 with current of : 49mA; 49mA; 48.5mA; 49mA matched quartet

Sold with original boxes