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Question about the phantom (AB 12V) power

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Nao Nakazawa
Question about the phantom (AB 12V) power
on Jun 8, 2016 at 3:27:27 pm

Hi professionals,

I am on a shoot here in Japan and I rented Sigma SS302Rex.

On its power selection there's AB power. I'm using Lectrosonics receiver UCR201 and I had it on line. It was pretty quiet even with the gain up quite a bit. I was playing around to figure it out and when I switched to AB power, it boosted up the signal and sounded loud and clear. Of course the manual says I shouldn't and I don't want to damage the receiver. I don't know why it sounds better though...

Can someone explain me what is going on here?

Thanks.


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Richard Crowley
Re: Question about the phantom (AB 12V) power
on Jun 8, 2016 at 4:47:23 pm

It seems possible that when you switched to AB power, it also switched from line-level input sensitivity, to MIC-LEVEL input sensitivity. That would appear to indicate that you have the wireless receiver set for mic-level output. I would investigate setting the wireless receiver for line-level output.


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Brian Reynolds
Re: Question about the phantom (AB 12V) power
on Jun 9, 2016 at 1:35:50 am

T or (12v AB) powering [same thing] does and will blow things up..... been there done that.

There should be NO reason to apply Phantom or T powering to a radio mic receiver......EVER.


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Nao Nakazawa
Re: Question about the phantom (AB 12V) power
on Jun 9, 2016 at 2:36:57 pm

Thank you. I am now setting it to line and try to deal with boosting gain up.


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Nao Nakazawa
Re: Question about the phantom (AB 12V) power
on Jun 9, 2016 at 2:35:38 pm

Thank you.
I didn't find a way to change the receiver between LINE and MIC. Does anyone know how?


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Richard Crowley
Re: Question about the phantom (AB 12V) power
on Jun 9, 2016 at 8:00:00 pm
Last Edited By Richard Crowley on Jun 9, 2016 at 8:00:30 pm

"I didn't find a way to change the receiver between LINE and MIC. Does anyone know how?"

On page 5, the manual says...
"OUTPUT LEVEL ADJUST Convenient front panel controls allow adjusting the audio output in 1dB steps from -50 to +9 dBu."

http://www.lectrosonics.com/US/phocadownload/ucr201man.pdf page 5


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