U52 Marconi red label codes RJ 4 JJ 4 black plate brown base Square getter 5U4G CV575 CV1071 pair rectifiers tested 100%

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.

Pair Marconi U52 red paper label black plate full wave rectifiers with Square getter.

Both valves have same design U52 and codes on glass RJ 4 and JJ4 made at Hammersmith London UK.

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