(1) Tested GE 6JV8 Tube and Box Date Code NJ General Electric Triode Pentode (a)

(1) Tested GE 6JV8 Tube with Box Date Code FI General Electric Triode Pentode

(1) Tested RCA 6JV8 Tube and Box Date Code BZ Triode Pentode Tube (b)

(1) Tested GE 6JC8 Tube with Box Date Code SC General Electric Triode Pentode

(1) Tested Admiral 6JV8 Tube and Box Date Code 63-44 Tung Sol EIA Triode Pentode

(1) Tested GE 6JD6 Tube with Box Date Code JR General Electric Pentode Tube

(1) Tested GE 6JD6 Tube and Box Date Code HH General Electric Pentode Tube

(1) Tested Sylvania 6JV8 Tube with Box Date Code NR AAA Triode Pentode Tube