Adjustable HV High Voltage Supply Module For Geiger Tube Counter And Dosimeter

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New note: apparently this power supply (1000V option without the anode resistor) can be used to drive 100MOhm PMTs<br>Please find below a message from one of the buyers:<br>Hi, the item is arrived today, very fast delivery. The module was exactly set to 1000V as you write. With 100 MOhm NaI scintillator probe the voltage drop is between 1 to 2 V. Very good. As comparison theremino with same probe drop of 30V. I haven't do a long test about voltage stability but in short time seems to be very good to. ... ... Anyway congrats for your power supply. Low price and good performance. 5 stars.<br>Robertino B.<br>---<br>Currently I also have the following tubes in stock (please inquire by message):<br>SBT-9 (alpha beta and gamma)<br>SBM20 (beta and gamma)<br>SI-29BG (beta and gamma)<br>SBT11 (alpha beta and gamma)<br>SI8B (alpha beta and gamma)<br>SBT10 (alpha beta and gamma)<br>SI22G (gamma)<br>IMEX-38-56-1 is an adjustable high voltage generator module for Geiger-M<br>ü<br>ller tubes.<br>The module is for use in geiger counters and dosimeters where portability, small size, very low power consumption and stability is required.<br>Specifications:<br>supply voltage:<br>3-6.5V<br>High voltage:<br><400 to >550V<br>(<br><700 to >1000V custom range possible on request)<br>adjustable with a 24 turn trimmer potentiometer. Practically all popular western and russian-made<br>Geiger-M<br>ü<br>ller tubes are supported. Current limiting 5M1 resistor is already installed (for most<br>Geiger-M<br>ü<br>ller<br>tubes of Russian<br>origin).<br>Low quiescent (standby) current:<br>< 10μA<br>(at 400V setting/no load typical average<br>quiescent current<br>is<br>7<br>μA)<br>Low ripple:<br>1 to 5V<br>(usually 1V)<br>Working temperatures:<br>-20 to +60<br>ºС<br>Dimensions: L<br>36<br>mm<br>x<br>D<br>23<br>mm<br>x<br>H<br>6mm<br>Pin from left to righ spacings from the left side:<br>HV pin 5mm, GND pin 10mm, Vcc 25mm<br>Vcc pin to the right side is 11mm<br>Weight: 5<br>g (0.17637 oz)<br>Three pin module: pin 1 HV, pin 2 GND, pin3 positive input voltage<br>Currently shipping modules are produced on the factory made PCBs (green color solder masked) and encapsulated in epoxy for isolation purpose.<br>Color of the resin may vary (transparent or black - depending on the current supply)<br>Each module is professionally tested after manufacture and before shipping.<br>---<br>In the below graph a dependency of the output voltage on constant load current is provided for when the device is preset for 400V and powered from 5V power source.<br>To correctly estimate the power of the HV generator, measurement was taken with the serial, output 5,1MΩ current limiting resistor removed.<br>Micro-ampermeter with a very low (10μV/1μA burden voltage) was used to do the measurement so the graph is rather precise.<br>The<br>continuous load<br>current where the voltage begins to drop below 397V is 107,8μA while one section geiger tube<br>pulse (noncontiguous)<br>currents are usually in magnitude of 1 to 3<br>μA.<br>Multi-section pancake geiger tubes are accommodated well too i.e. SBT11 ( which has 4 sections ) has a combined current specified at min. 4<br>μA<br>and max. 11<br>μA or<br>a 10-section SBT10 pancake tube<br>pulse<br>current<br>of one section is<br>min. 0.3<br>μA<br>to max. 1,5<br>μA<br>. It means that at the maximum specified count rate these tubes shall be correctly powered with the at the nominal working voltage without compromise.<br>On the shipping device<br>the<br>5,1MΩ<br>resistor<br>is installed<br>by default<br>as geiger tubes usually need such resistor with its values starting form around<br>5,1