The following tubes have been tested on a calibrated Hickok TV-7B/U where a value of 32 (ie. Gm 800) is the minimum Gm requirement. All these tubes tested around 38 ~ 62, ie. Gm 950 ~ 1550 in good to new condition, all tubes come with measurement results.

21. 1pc. Sylvania 7025, long grey plate, copper grid rods, nib - $500
22. 1pc. Sylvania 6681/12AX7A, long grey plate, copper grid rods, nib - $500
23. 1pc. Westinghouse 12AX7, long black plate, D-getter, nib - $600
24. 2pcs. GE 12AX7, long black plate, D-getter, nib matched pair - $1200
25. 2pcs. Westinghouse RCAF JCK 12AX7, long black plate, large O-getter, nos matched pair - $1200
26. 1pc. Westinghouse 12AX7, long black plate, large O-getter, nib - $600
27. 2pcs. Westinghouse 12AX7, long black plate, square getter, nos matched pair - $1200
28. 2pcs. GE 12AX7, long black plate, O-getter, nos matched pair - $1200
29. 2pcs. GE 12AX7, long black plate, painted-tip, O-getter, nos matched pair - $1200
30. 2pcs. GE 12AX7, long black plate, D-getter, copper grid rods, nos matched pair - $1200
31. 1pc. RTT Tronik 12AX7, long grey plate, square side getter, good - $300
32. 1pc. NJRT 12AX7, long grey plate, square getter, new - $500
33. 1pc. GE 12AX7, long grey plate, D-getter, new - $500
34. 2pcs. GE 12AX7, long grey plate, D-getter, copper grid rods, new matched pair - $1000
35. 2pcs. RCA 12AX7/ECC83, long grey plate, O-getter, new matched pair - $1000
36. 2pcs. Sylvania 12AX7, long grey plate, copper grid rods, O-getter, new matched pair - $1000
37. 2pcs. Sylvania 12AX7, long grey plate, copper grid rods, O-getter, new matched pair - $1000

絕對正貨，請安心購買。
市區地鐵站交收，meet-up at MTR Stations.
I am a vintage hi-fi and electronic enthusiast, all vacuum tubes are my private collection from Canada. 所有出讓的真空管都是小弟從加拿大带返之私人收藏。