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

Offline ve6ao

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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

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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.
73
Roger
W8RJ