(The world best C3gS you can get Unused tubes. The desired result in the application is therefore purely random. S/gm: 15,870 + 15,740 (100% = 14,000 >> all from 12,000 to 16,300 is as good as new<<) ).
Mullard - Technical Handbook - Part 2 Valves/Tubes -Part 3 Photomultipliers 1978
2 NOS tubes E88CC 6922 Siemens Munich 1963 "A4 8K" matched pair Lot09 068
6H9C vacuum tubes set 2 pcs for replacing 6SL7 6N9P tubes in audio amps
2C34 VT224 VALVE PAIR CLOSE MATCH NOS NIB TEST 100% TUBE NATIONAL UNION USA WW2
(2) Siemens Mesa Engineering STR 450 EL34 Duet Guitar Power Tubes NOS Amplitrex
Bendix 5852 tubes valves (≈ 6X5GT) x 2 (AVO tested)
