Rare New Old Stock (NOS), Never-In-Box (NIB) 6X5 rectifier valves from Fivre, featuring the uncommon mono-plate construction. These units were selected for high-reliability military and broadcast equipment in post-war Europe.

Each pair is individually tested for transconductance & emission over original datasheet specifications, then matched for balanced operation in full-wave rectifier circuits. Known for smooth voltage regulation and exceptional longevity.

Available as matched pairs only, with full documentation upon request.