FOR SALE: 1 X E90F TUBE. NEW OLD STOCK IN ORIGINAL BOX.

BRAND: MINIWATT. 1960s PHILIPS PRODUCTION.

MESH PLATES, HALO GETTER, COPPER RODS.

SQ = SPECIAL QUALITY

TESTED IN ROEHRENTEST TUBE TESTER

117% 8.69mA EMISSION (EM). 4.96mA/V TRANSCONDUCTANCE (GM)