Author Topic: MBIAS Jumper in ORB Device?  (Read 97 times)

Offline ve6ao

  • Remote Enthusiast
  • ***
  • Posts: 15
MBIAS Jumper in ORB Device?
« on: April 12, 2018, 08:47:55 pm »
Noticed a rattle in my ORB device. Opened it up and a jumper fell out. Noticed the MBIAS jumper pins without any attachment. I assume it goes there. Is the factory default to have the jumper over both pins or just one? What is the purpose of it?

Offline w8rj

  • Moderator
  • Remote Master
  • *****
  • Posts: 2353
Re: MBIAS Jumper in ORB Device?
« Reply #1 on: April 13, 2018, 04:45:30 am »
It's to supply bias voltage for electret microphones. If your microphone requires bias voltage it put the jumper across both pins, if not just place it on one of the pins.