U52 Osram gold BBC green sticker codes FK 4b FB 4 1953 black plate cup getter 5U4G CV575 CV1071

Description

The U52 aka 5U4G is one of the best selling valve here at Audio Magical.

We had many requests about this valve and its variation.

We thought it is our commitment to show all that is available for this directly heated full wave rectifier that saw the light in the 1940s.

With a rating of 500 Volts on the anode, the U52 remains the best option for any vintage and modern set.

Please browse through all we have including precious Mullard long cone long glass U52 (5U4G) and other variations.

Another pair U52 gold, this time we have a BBC version of U52 with very close codes on glass FB4 and FK4,  black plate, full wave rectifiers with cup getter.

Both valves have same design U52 .

Tested with AVO VCM 163 with A1=A2 100% emission