EL84 MULLARD OLD SHIELD WHITE PRINT MATCHED PAIR SAME FACTORY CODE kM1 B9B4 BLACKBURN  1969
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EL84 MULLARD OLD SHIELD WHITE PRINT MATCHED PAIR SAME FACTORY CODE kM1 B9B4 BLACKBURN  1969 EL84 MULLARD OLD SHIELD WHITE PRINT MATCHED PAIR SAME FACTORY CODE kM1 B9B4 BLACKBURN  1969 EL84 MULLARD OLD SHIELD WHITE PRINT MATCHED PAIR SAME FACTORY CODE kM1 B9B4 BLACKBURN  1969

EL84 MULLARD OLD SHIELD WHITE PRINT MATCHED PAIR SAME FACTORY CODE kM1 B9B4 BLACKBURN 1969

  • £80.00

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EL84 MULLARD OLD SHIELD WHITE PRINT MATCHED PAIR SAME FACTORY CODE kM1 B9B4 BLACKBURN 1969

Here on offer we have a matched pair of Mullard old shield white print, EL84 output pentode valves. These are a nice catch indeed as both are from the same manufactured batch and carry the etched code of kM1 B9B4 which denotes a Blackburn 1969 production

Tested using our AVO VCM163 these are a fine matched pair giving the following test results:-


For Va = 250 V; Vg = - 7.5 V against a nominal specification for Ia = 46 mA  gm = 11.3 mA/V

C248:   Ia = 47 mA  gm = 10.5 mA/V

C249:   Ia = 47 mA  gm = 10.5 mA/V 

As you will appreciate these are very finely matched giving near identical and near nominal readings - a treat for any push pull amplification stage.


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