EL84 Mullard special version on glass CV2975 KB/DA km rx1 on glass rare

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 you see here have CV number that means Commercial Valve and were made in quite limited edition CV2975, tested at 6.3 Volts filament with both Anode and Screen at 250 Volts and negative grid of 7.3.

Four Mullard CV2975  code on glass rx1 and km made at Blackburn England

EL84 Mullard have been tested with AVO 163 with current of : 47mA; 48mA; 48mA; 49mA matched