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AUDIO VALVES: EZ81 U709 UU12 CV5072 6CA4 RECTIFIER

The EZ81 was introduced by Mullard as a high current B9A rectifier, the low power rectifier offered by Mullard was the 90 mA EZ80. Prior to marketing the EZ81, Mullard designs used the GZ34.  In use the maximum reservoir capacitor would be limited to 50 µF and to prevent damage by excess current a series resistance of 230 Ohms is used.  The thin glass tube envelope is 19 mm in diameter and excluding the B9A base pins is 70 mm tall.  The EZ81 saw much use in classic hifi and classic guitar amplifier designs and finds use today in some new design valve pre amplifiers.

 

               

 

 

 

 

U709, MARCONI, EZ81 WHITE PRINT, MATCHED PAIR

U709, MARCONI, EZ81 WHITE PRINT, MATCHED PAIR
EZ81 ,ZAERIX, WHITE PRINT, CZECHOSLOVAKIA MANUFACTURE, TESLA 1970'S PRODUCTION, NOS BOXED

EZ81 ,ZAERIX, WHITE PRINT, CZECHOSLOVAKIA MANUFACTURE, TESLA 1970'S PRODUCTION, NOS BOXED
EZ81 ,COSSOR, YELLOW PRINT

EZ81 ,COSSOR, YELLOW PRINT
EZ81 ,ZAERIX, WHITE PRINT,

EZ81 ,ZAERIX, WHITE PRINT,
EZ81, MULLARD, NEW SHIELD, 8t1 c2L, HENDON AUSTRALIA MANUFACTURED, DECEMBER 1972, WHITE BOXED

EZ81, MULLARD, NEW SHIELD, 8t1 c2L, HENDON AUSTRALIA MANUFACTURED, DECEMBER 1972, WHITE BOXED
EZ81 , EDICRON, TESLA BRANDED, NOS BOXED

EZ81 , EDICRON, TESLA BRANDED, NOS BOXED
EZ81, STC Brimar, , White Print ,British Made

EZ81, STC Brimar, , White Print ,British Made
EZ81, MULLARD, NEW SHIELD, 8t1 c1K, HENDON AUSTRALIA MANUFACTURED, NOVEMBER 1971, NEW, NOS, BOXED

EZ81, MULLARD, NEW SHIELD, 8t1 c1K, HENDON AUSTRALIA MANUFACTURED, NOVEMBER 1971, NEW, NOS, BOXED
EZ81 , EDICRON, TESLA BRANDED, NOS BOXED

EZ81 , EDICRON, TESLA BRANDED, NOS BOXED
EZ81 ,ZAERIX, BOXED NOS, WHITE PRINT,

EZ81 ,ZAERIX, BOXED NOS, WHITE PRINT,
EZ81, Philips, Grey Print, 8t1 53y, Barcelona, 1963 Production

EZ81, Philips, Grey Print, 8t1 53y, Barcelona, 1963 Production
EZ81 ,MAZDA, WHITE PRINT,

EZ81 ,MAZDA, WHITE PRINT,
EZ81 ,MAZDA, WHITE PRINT, NS APRIL 1961 MANUFACTURE

EZ81 ,MAZDA, WHITE PRINT, NS APRIL 1961 MANUFACTURE
EZ81 , MAZDA, UU12, WHITE PRINT, BRITISH MADE, 1963 MANUFACTURE

EZ81 , MAZDA, UU12, WHITE PRINT, BRITISH MADE, 1963 MANUFACTURE
EZ81 MULLARD OLD SHIELD WHITE PRINT, 8t1 B8K, BLACKBURN 1958 MANUFACTURE

EZ81 MULLARD OLD SHIELD WHITE PRINT, 8t1 B8K, BLACKBURN 1958 MANUFACTURE
EZ81, Mazda, White Print ,British Made

EZ81, Mazda, White Print ,British Made