U12 Osram balloon Holy Grail audio rectfiers R2 R3 DW4/350

U12 Osram balloon shape £ 550 pair.

U12 Osram balloon shape £ 1,000 quartet.


U12 Osram balloon shape audio rectifiers, the best of their kind.

Osram balloon U12 dated circa 1931 with dome or balloon shape, sporting a lovely mesh plate and full cup getter.

These Osram U12 has been reckoned to be the best rectifiers to use on valves amplifier with directly heated triodes such as PX4 and Px25 and all equivalents you can possibly imagine.

They do a great job on radios and other devices.

All four valves have been tested and 100% working order.


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