(1) Tested RCA 6GH8A Tube with Box Date Code HE Triode Sharp Cutoff Pentode Tube

(1) Tested Sylvania 6GH8A Tube with Box Date Code ae Triode Sharp Cutoff Pentode

(1) Tested Westinghouse 6JW8 Tube Date Code 81-09 Triode Tube Pentode Tube (a)

(1) Tested Lindal 6GH8A Tube Japan Code 448 Triode Sharp Cutoff Pentode (b)

(1) Tested Lindal 6GH8A Tube with Original Box Triode Sharp Cutoff Pentode

(1) Tested Very Strong IEC 6GH8A Tube Japan Date Code 1022-120 309 Halo Getter

(1) Tested Westinghouse 6GH8A Tube with Box Date Code 70-22 Triode Pentode

(1) Tested Lindal 6GH8A Tube with Box Japan Code 448 Triode Sharp Pentode (a)