EL84 Mullard 6BQ5 Holy Grail FULL top getter very rare matched quartet code on glass 1608 L4

Description

The Mullard EL84 is 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 Mullard EL84 shown here are by far the rarest and the best Mullard EL84 ever made when production started in the early 1950s.

The Mullard EL84 we have for sale are unique!

They all have full getter on top

They all have early code on glass that is 1608 L4

Holy Grail of audio valves

The Mullard Old Penta logo 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.

EL84 Mullard have been tested with AVO 163 with current of : 48mA; 49mA; 48.5mA; 49mA matched quartet 100% emission