FW4/500 Mullard black plate full getter audio rectifiers 45-IU NU12 RV200/600 U18/20

Description

The Mullard FW4/500 is a solid valve able to cope with plate voltage of 500 Volts.

We offer a quartet or a pair, it depends on y0ur needs, of such a stunning valve, which shows off  high vacuum hence best rectification, make no mistakes.

The plate is carbon and the filament is tape oxide.

All four valves have clean top and in perfect condition and working order.