(!) U19 GEC UK NOS 1960's (1 pair)
1 pair) CV187=U19 GEC UK NOS 1960's - reboxed
The U19 is a half wave high voltage vacuum rectifier. The U19 was designed to have an effective series resistance of 600 Ohms and to feed a reservoir capacitor of not more than 4 µF.
This exhibit, made by M-OV, is branded GEC which was the brand for professional sales.
(Vfil=4.0 @ 3.3A, Vplate max=2500V @ 250ma)