Jerry, referring to you scheme in your post # 20, what do you mean by Normally open connection "Normally" related to which application ? Edit: @jerry, @Grumage, I have added a few circuit-diagrams you may try. In a russian forum long time ago I saw a picture of a metal cup as capcitative load on top. Inside the cup the guy had placed a door-nob-capacitor 500pf > 10 kV so that one terminal was laying ( galvanic connection) on the bottom of the cup. The other terminal was connected to a incandescent lamp and from the lamp he had a wire connected to a winding of the primary. There were only 5 primary thick copper-windings so it seemed to me he was just gliding with the end of the wire along the primary until he found the right spot. The bulb was fully lit. The door-nop capacitor in this setup was acting as a high frequency-resistance so he will get enough voltage-drop for the 230 V lamp...lampitschka That is the reason why I propose the feedback to the primary of the HV-transformer as a option. One additional remark: Keep the feedback-line of the T-Tap as short as possible otherwise you get some uncontrolled inductive element in the circuit which influences the switching-speed of the sparkgap negatively. See: ADA638250.pdfIts not my style to only suggest circuits and not showing my own work but I am in the midst of another subject and have no extra time right now to test this myself Mike
« Last Edit: 2021-10-19, 22:09:36 by Kator01 »
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