• Counts at lower voltage

    daw9000 • 03/09/2022 at 15:59 • 0 comments

    Running at 350v with the dob-50 tube (normally would run at 390v) I am getting on average 0.7 counts per minute which is fine for me as I did not want the counter clicking away at the normal 6-12 counts /min I get for this tube. I am assuming that with the lower voltage only higher energy particles are triggering.

  • Chattering relays and counters

    daw9000 • 03/04/2022 at 01:29 • 0 comments

    I initially had big problems firing the pulse counter. I used a 5v relay to pulse 12v to the counter but kept getting relay chatter even when using driver circuits. Eventually I placed a high speed schottky diode across the counter terminals which solved the issue. Pulse length was another critical part of stopping the chatter and reliability.