Simple and pressure tester ----- Simple Withstand Voltage Tester

Simple with pressure tester, Simple Withstand Voltage Tester Keywords: pressure tester production, simple withstand voltage tester circuit This device is convenient to measure the back pressure of the triode, diode, regulator tube, and thyristor, etc .; capacitor withstand voltage; greater than 10 mΩ resistance. The output voltage is continuously adjustable, up to 1400V. working principle The measurement circuit is shown in Figure 1. After 6V of the transformer T via D5 rectification, C3 filters, the base voltage of the adjustment tube Q is provided. Adjust W can control Q. That is, the control collector A varies between the voltage between 4V-1400V. The 500V voltage of the high voltage winding output, the multiplier rectifier circuit of C1 and D1-D4, and the C2 filter output is 1400 V high pressure. When testing, the device under test is connected between A, B. The W resistance is adjusted, the base potential of Q is lowered, and the A point potential rises. Until the milliacist indicates the rated reverse current of the tube (the small power tube <0.1 ma,="" the="" high="" power="" tube=""><1 ma="" should="" be="" applied).="" at="" this="" time,="" the="" voltage="" value="" indicated="" by="" the="" voltage="" gauge="" is="" the="" reaction="" pressure="" under="" the="" reverse="" current.="" when="" measuring="" the="" resistance="" resistance="" is="" measured,="" the="" electrical="" resistance="" is="" connected="" to="" the="" a,="" b,="" and="" the="" number="" of="" voltmeter="" reads="" is="" divided="" by="" the="" millian="" reading,="" and="" the="" unit:="" ω="v" a.="" each="" time="" it="" is="" used,="" the="" w="" is="" adjusted="" to="" maximum,="" so="" that="" the="" output="" voltage="" is="" returned="" to="" the="" low="" point="" 4v.="" component="" selection="" q="" requires="" that="" β="" ≥="" 5,="" bvcbo≥1500v,="" reverse="" leakage="" current=""><0.01ua. the="" heat="" sink="" can="" be="" selected="" from="" the="" high="" back="" pressure="" tubes="" such="" as="" c1942,="" c2027,="" bu="" 208.="" t="" is="" the="" tube="" radio="" power="" transformer,="" and="" the="" old="" goods="" market="" can="" be="" purchased.="" the="" voltmeter="" is="" 10k="" ω="" v="" above.="" it="" is="" best:="" 1500v,="" 500v,="" 250v,="" 50v,="" 10v.="" the="" millian="" table="" should="" have="" 0.5ma,="" 5ma.="" it="" can="" be="" replaced="" with="" a="" multimeter,="" respectively.="" pay="" attention="" to="" the="" insulation="" between="" the="" circuits="" when="" making="" it.="">

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