The tube tester can test most of the small general-purpose tubes. The machine has been improved many times, and it is now a better one. The main indicators are: the anode voltage can reach 360v, the current is 150mA, the grid voltage is the lowest -70v, and the anode current and mutual conductance coefficient are tested. Comes with reference data of commonly used tubes. The machine cannot test rectifier tubes, and tubes with anode voltage exceeding 360v cannot be tested.

GS-360EN vacuum tube tester

一、 Performance introduction The tester can directly test 220 kinds of low power vacuum electronic tubes, for not commonly used or different tube seat, different tube foot position, if the filament voltage, screen voltage can adapt, it is recommended to use the extended socket to achieve the purpose of the test.

二、 Key technical indexes
1. Plate voltage： 90V - 150V - 360V Continuous adjustable.
2. Plate current： 175 mA maximum current.
3. Transconductance measured range： 0-25mA/V。
4. Grid voltage adjustment range： 0V - （ -20 V ），
Part of the type ： 0V - （ -60 V ）.
5. Electron-tube heater voltage：
1.2 V 、2.5V、5.0V、6.3V、12.6 V （ DC ）.
Below 6.3V ≦2.5A，12.6V≦1.2 A .

三、Introduction of the instrument panel function
The tester has a power input, power switch, U1-U12 pipe seat, each electrode voltage regulation setting and measurement display several parts.
The manual comes with a list of vacuum-tube models.
Please read the model list for testing directly.
1、The panel has 12 common tube seats for U1-U12，which can directly test 220 kinds of electronic tubes。Tubes not included in the model list，needs query the corresponding parameters and pin leads ， Appropriate seats and test parameters were used，No suitable tube seat，Can be tested
with an extended socket ，In order to accommodate the more models，The machine uniformly defines 26 standard expansion sockets

   There are 26 kinds of expansion sockets, which can only be inserted in the instrument panel U1 or U2 socket, and can not be used in the U3-U12 socket.

  This expansion socket is supplied as an option.Users can make the expansion socket according to the individual expansion socket number and adaptive tube model.

1. The subsequent version model did not print the version number in the corresponding position of the panel，Users need to distinguish it by themselves.
2、Electron-tube heater voltage：The panel is equipped with a multi-gear rotary switch used to set the filament heating voltage of the tube to be tested.
The DCDC circuit is used to generate a filament voltage，Five voltage gears are set to 1.2v、2.5v、5.0v、6.3v、12.6v.
The filament voltage is in DC current，When testing a straight hot tripole tube，The midpoint of the filament voltage potential is equal to the cathode K.
3、Adjustment of plate voltage and gate pole voltage：The range of plate voltage（Ua）and second grid voltage （Ug2）is 75 to 330 volt，This voltage regulated by a Multi-circle resistor.
The first gate（grid） voltage range is 0 to -20 volt，current≦10mA。The grid voltageIs a negative voltage，Therefore, the positive gate pressure electronic tube cannot be tested。exceptional ，The tube of 2A3 and 300B need a voltage of -45V and above，A cathode resistance is used here to generate a self-bias pressure，then set Ug1 = 0 volt.You can set the voltage to 0 - 1.0V.
The cathode resistance is 750 Ω，5W