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4 X ECC83 TUBE. USED.
BRAND: MINIWATT BARCELONA. 1960s PRODUCTION.
CHROME PLATES, HALO GETTER, COPPER RODS.
TESTED IN FUNKE W20 TUBE TESTER:
MINIMUM GOOD EMISSION = 60% = 0.7mA
1.0/1.3mA EMISSION (EM)
0.9/1.0mA EMISSION (EM)
1.3/1.1mA EMISSION (EM)
2/1.9mA EMISSION (EM)
CH167U1
