VR1 - getting ticks at full counter clockwise ?
Posted: Sun Mar 13, 2022 7:24 am
First, I really enjoyed building this device! Instructions are fantastic and the PCB and case are beautiful. Thanks!!
So per the instructions, turn VR1 fully counter-clockwise, power on the unit, and slowly turn til you hear ticks. I hear ticks at the fully counter clockwise position... should I be turning this to 9 o'clock position then? That is first ticks sound position + 45 degrees? Does this set the voltage? I could get the 1 giga ohm resistor to measure and then dial VR1 that way with my multimeter to target 400V?
One other question, why are so many of these geiger tubes sourced from Ukraine?
Thanks!
Hans
So per the instructions, turn VR1 fully counter-clockwise, power on the unit, and slowly turn til you hear ticks. I hear ticks at the fully counter clockwise position... should I be turning this to 9 o'clock position then? That is first ticks sound position + 45 degrees? Does this set the voltage? I could get the 1 giga ohm resistor to measure and then dial VR1 that way with my multimeter to target 400V?
One other question, why are so many of these geiger tubes sourced from Ukraine?
Thanks!
Hans