Mullard CV4024/ECC81 - CV4024/ECC81

The Mullard ECC81-CV4024 has the CV4024 markings which were the UK Government designation which indicated the special quality RAF valve that was specially designed to work in the most difficult operating conditions. This valve was specially designed for long life and shock resistant up to 500g and with a high temperature rating.

The CV4024 has the famous double ribbed ladder plate anode structure and feature large wide ribbed plates with special copper plate supports that suppress microphonics which makes these valves very low in microphonics.
They were supplied to NATO forces across the world and therefore used the highest quality components and underwent strict quality controls.

They are simply made better; they last longer, have less noise and have conformity to the high specification design parameters. So when you compare this to modern ECC81 and you will understand why we do not stock any of modern made ECC81.

When you listen to these you instantly get that classic Mullard sound when used to drop the gain in your amplifier or pedals. Sonically the valves are warm and clean with excellent top end extension.