Description
The EF50 (military designation CV1091) is a remote-cutoff pentode designed by Philips and produced by Mullard during the Second World War. It was one of the most important valves of the conflict, used extensively in British radar sets (including the cavity magnetron receiver chains), VHF radio equipment, and early television intermediate-frequency stages.
The EF50 introduced the Rimlock B8G base to the world — a design later adopted across the Philips/Mullard range — and its combination of high transconductance, low noise, and wide bandwidth made it a benchmark for RF and IF amplification. For collectors, a genuine Mullard CV1091 represents a tangible link to the birth of modern electronics.
Each valve is tested on an Amplitrex AT1000 before dispatch. Supplied as a single valve.
