UU7 Mazda CV3761 one of the classic audio 4 Volts heater used on RGD1046 amplifier radiogram

Description

The whole series of Mazda UU’s valves were made between the 1930s and the early 1940s.

Mazda produced the UU7 with metalised glass. This was a new development for audio innovation.

The Mazda UU7 are used on RGD1046 radiogram and  separate stereo amplifiers.

All four UU7 valves have been tested 100% with full emission and working order.