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1 X EL33 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: MULLARD. 1950s PRODUCTION.
GREY PLATES, D-GETTER, COPPER RODS.
TESTED IN ROEHRENTEST TUBE TESTER:
85% 30.58mA EMISSION (EM) 8.53mA/V TRANSCONDUCTANCE (GM)
CH164U1