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Author Topic: Audio Pick up help  (Read 3540 times)

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Offline anthonyh

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Audio Pick up help
« on: February 21, 2011, 06:30:37 PM »
Hello,
    We have a client who wanted to add audio pick up to one of his offices, we advised of all the legalities, signs, etc.  And went ahead and ordered a pic up mic.  The Mic has bare wire outputs and requires 22/2 shielded stranded cable. The input on the DVR is a BNC

This is the schematic the mic comes with.



The total distance of the run is just around 35'

A few questions, do you think I can use 22/2 shielded but solid cable? (i have enough of that in stock)  I was thinking of crimping the BNC to a 2' piece of RG59, then stripping the other end and soldering the center conductor to one of the leads, then soldering another jumper to the outer braid.  connecting that jumper to the negative output of my power supply along with the shield lead. Then heat shrieking the whole mess (independently).  And just connecting the bear leads at the far end.

So it would be one lead to the positive output of my power supply
The other lead to the center conductor of the rg59
the shield to the copper braid on the rg59 then jumper-ed to the negative output of my power supply


I am thinking that there has to be a better way, I am open to suggestions.

thanks
...Please don't touch that

Online MrGemini

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Re: Audio Pick up help
« Reply #1 on: February 21, 2011, 07:49:25 PM »
Anthony, why not put an RCA connector on the DVR end and get a RCA to BNC adapter for the audio only.
Audio is black and Com is shield. Clip the red conductor.
Then use a separate cable for the power supply. Power is red and Com.
----------------------
Wayne

Online MacGyver

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Re: Audio Pick up help
« Reply #2 on: February 21, 2011, 08:51:00 PM »
Anthony the brand name of the ones we use escapes me at the moment, but they work just find with the wire you're wanting to use.  At least it's been my experience that they do, and I've got some runs a little longer than that in false ceilings with the old magnetic ballast lights.
-I'm only here because my flux capacitor is broken.

Offline anthonyh

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Re: Audio Pick up help
« Reply #3 on: February 21, 2011, 08:53:36 PM »
Wayne, thank you, that makes so much more sense, I was just over thinking it.

I have a bunch of rca to bnc adaptors.
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Online MacGyver

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Re: Audio Pick up help
« Reply #4 on: February 21, 2011, 09:07:08 PM »
Louroe is the brand we use.  That was driving me crazy, and it's a short walk for me by this time of the day.  :011:
-I'm only here because my flux capacitor is broken.

Offline anthonyh

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Re: Audio Pick up help
« Reply #5 on: February 21, 2011, 09:09:36 PM »
thanks I will keep that in mind for next time
...Please don't touch that

Online hbiss

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Re: Audio Pick up help
« Reply #6 on: February 22, 2011, 08:48:36 AM »
The input on the DVR is a BNC

And that's an audio input?

-Hal
I gotta get out of this business...

COMSYSTEC- Phone Systems | paging systems | background music systems | foreground music systems | retail music | restaurant music

Offline anthonyh

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Re: Audio Pick up help
« Reply #7 on: February 22, 2011, 06:17:47 PM »
Correct Hal...it is an audio input.   Every channel has an audio input as well as video
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