Mullard CV3986 6021 - 1975 MINT NOS NIB Mitcham Special Grade Plug&Play for ECC88/E88CC/6922/E188CC/7308/6DJ8 NOVIB-ULTRA© mu=35 High Elastance vibration reduction base. 9-PIN B9A NOVAL - Made in Gt. Britain (Singles/M. Pairs) - AKA Mini-Mullard High Reliability Long Life version

High Reliability Long Life version of E188CC CV4108 7308 valves

Brand New MINT NOS NIB Rare BRIMAR CV4035 Box Plate Military tubes

but the tubes are from 1961 production

Now where it gets interesting

In this process I volume match to the decibel

Mullard CV3986 6021 - 1975 MINT NOS NIB Mitcham Special Grade Plug&Play for ECC88/E88CC/6922/E188CC/7308/6DJ8 NOVIB-ULTRA© mu=35 High Elastance vibration reduction base. 9-PIN B9A NOVAL - Made in Gt. Britain (Singles/M. Pairs) - AKA Mini-Mullard High Reliability Long Life versionNew and Exclusive at Pulse. This Mini Mullard ECC88 E88CC E188CC sub will blow you away. It joins our Top 4 reference tubes in the ECC88 6DJ8 E88CC 6922 E188CC 7308 family. Our custom base makes this tube Plug&Play in any 9 pin socket. No Microphonics Common problem with fragile frame grid tubes of the ECC88 6DJ8 family, as per the RCA specs (see below) this tube is solid as a rock. Also we have potted this pencil thin tube in a High Elastance base