RARE PAIR OF MULLARD BLACKBURN ECC81 

NOS BOXED 

Vf3 CODES DATED TO 1967 AND 69

TESTED STRONG  




AVO VCM163 TESTED

READINGS


TUBE 1  -   Ia 10.4/10.4         gm   5.8/6.0

TUBE 2  -   Ia 10.3/11.4         gm   5.3/5.8



100% = Ia 10.0   gm 5.5




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