Best used for testing.
Item Tag: Shuguang
Shuguang China 5AR4 GZ34 Copper Rectifier VACUUM TUBE TV7 Test Strong Good 🔈
Test results will vary between testers as it is not an exact science. I also use variac at 120 volts with my testers. Mutual Conductance (GM)Test: 52 & 53 (58 = NOS AVERAGE & 40 = Good MINIMUM). Gas (Grid Current)Test: Passed.
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274B Shuguang tested 1 rectifier tube 5Z3P 5U4G 274 revised version USA seller
Shuguang 274B Vacuum Tube Electron Tube Improved For 5Z3P 5U4G 274. This tube has been manufactured with improved anode materials and cathode to allow for increased current handling without arcing. Overall stability is greatly improved.
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EL34B 6CA7 / Matched Quad / ShuGuang / Vacuum Tube/Valve Amplifier/ Original Box
4pcs ShuGuang EL34B 6CA7 Vacuum Valve Tube EL34 Amplifier Matched Quad New Version. Type : EL34B. Four EL34B ( Matched Quad ). ShuGuang factory 2024 year new upgrade version.