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1 X U50/80 MARCONI TUBE. SILVER PLATES. 1948s NOS/NIB. AVAILABLE 8PCS RCB399
you can see that all tubes are same internal construction.
You buy only one pc
TESTED IN ROEHRENTEST TUBE TESTER:
104/90% EMISSION (EM).
108/102% EMISSION (EM).
120/102% EMISSION (EM).
101/90% EMISSION (EM).
111/91% EMISSION (EM).
104/79% EMISSION (EM).
102/95% EMISSION (EM).
110/77% EMISSION (EM).
