GS-5B Electron Tube TesterDetailed product description：

The GS-5B electronic tube tester is the only portable electronic tube testing instrument in China. The instrument mainly measures the static parameters of electronic tubes, such as plate current and transconductance, and can also distinguish the short circuit and open circuit of electronic tubes, as well as the quality of small beads. GS-5B is a new generation of electronic tube testing instrument developed on the basis of GS-5A. It is controlled by a microcontroller, and the test parameters are displayed on a character LCD screen. Various control voltages are generated by a switching power supply. When testing electronic tubes, simply enter the tube number to perform automatic testing.

Maximum display board flow value at full range			255mA
Maximum displayed transconductance value at full scale			255mA/V
Maximum rated value of plate electrode DC voltage			300V
Maximum rated DC voltage of the second grid			300V
Maximum rated value of filament voltage			30V
Maximum rated value of the first grid AC signal			1V