One Excellent ZENITH 6BA8A Tube NOS NIB Triode/Pentode GM% 88/112 AMPLITREX

One Excellent RCA 6AZ8 Tube NOS NIB Triode/Pentode GM[%]: 86/106 AMPLITREX

One Excellent RCA 6GH8A Tube NOS NIB Triode/Pentode GM[%]: 84/108 AMPLITREX

One Excellent WESTINGHOUSE 6BA8A Tube NIB Pentode/Triode GM% 103/112 AMPLITREX

One Excellent RAYTHEON 6BA8A Tube NIB Pentode/Triode GM% 88/101 AMPLITREX

Two SYLVANIA 6BA8A Tubes NOS NIB Triode/Pentode GM% 96/116 92/121 AMPLITREX

One Excellent RCA 6BA8A Tube NOS NIB Pentode/Triode GM% 84/100 AMPLITREX

Two SYLVANIA 6BA8A Tubes NOS NIB Triode/Pentode GM% 85/109 88/101 AMPLITREX