MULLARD EL37 BIG BOTTLE MATCHED QUAD OF USED OLD STOCK IN BOX TESTS 100% STRONG VINTAGE VALVES TUBES

MADE IN THE MULLARD MITCHAM FACTORY GREAT BRITAIN IN 1952

MULLARD MITCHAM FACTORY CODES ARE ETCHED INTO THE GLASS OF OF THE VALVES 

MULLARD BOXES

BLACK BASE WITH CLEAN PINS

THIS MATCHED QUAD OF POWER TUBES TEST AT 100% STRONG ON MY B&K 747 AND HICKOK TV-7 CALIBRATED TUBE TESTERS

TESTED EXCELLENT FOR GAS AND SHORTS


PLEASE NOTE : FRIENDLY LOW CUSTOMS DECLARATION FOR ALL BUYERS

FREE INTERNATIONAL AIRMAIL SHIPPING - EXCEPT TO RUSSIA

PLEASE SEE MY EXCELLENT E BAY CUSTOMER FEEDBACK AFTER OVER 15 YEARS OF SELLING VINTAGE VALVES

PLEASE SEE MY 15 YEARS EBAY SALES AWARD IN THE PHOTOS

PLEASE NOTE:

I AM AN AUDIO MAN FROM WAY BACK AND I USE VINTAGE VALVES IN MY MODERN TUBE AMPLIFIER AND TUBE PREAMP WITH WONDERFUL RESULTS. 

VINTAGE VALVES MADE IN THE GOLDEN AGE OF AUDIO AUDIO IN THE 1950'S AND 1960'S ARE SO MUCH MORE MUSICAL SOUNDING THAN THE MODERN HARSH SOUNDING RUSSIAN AND CHINESE VALVES THAT ARE SUPPLIED AS STANDARD IN TUBE AUDIO EQUIPMENT THESE DAYS.