Valve Gallery - Rectifiers (1)

Valves: HVR2, SU-2150, MU12, MU14.

The first two rectifiers are specialist television high voltage types, that would not be encountered in domestic radios. Shown above is a Mullard HVR2 with B4 base. 4v heater of height 130mm.  Max voltage of 6000v but only 3ma Max I. The Cossor SU-2150 would have been used in a 'scope for example.  This valve has a max voltage of 8000v but only 2ma max I.  Using a B4 base with 2v heater but quite substantial height of 158mm.

Shown above is a Marconi Osram MU12.  This is the first version of this rectifier, appearing in a "balloon" glass envelope.  B4 base with max I of 120mA and max voltage of 350.  Height of 140mm Shown above is a Marconi Osram MU14, this is a similar valve to the adjacent MU12, but in a much later envelope.  This valve also has a max I of 120mA but can handle 500v.  B4 base with height of 127mm.

Continue to the next Rectifiers gallery page   

COPYRIGHT RETAINED ON ALL TEXT AND PICTURES ON THIS SITE 2005 AND BEYOND.