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Author Topic: Need to convert Lo-Z gooseneck to Shure wireless transmitter  (Read 1839 times)

Chris Kovic

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Need to convert Lo-Z gooseneck to Shure wireless transmitter
« on: November 28, 2017, 12:26:18 pm »

Dear Pros,

I need to make a mic converter. I have a Audio-Technica Lo-Z U857Q gooseneck that I need to plug into a Shure UR1 mini 4-pin XLR wireless transmitter.

I have no problem with the hardware components, soldering, etc. What I need is a schematic as I don't know how to figure out the resistance/capacitance/impedance conversions.

Any help would be much appreciated and I would even learn something along the way if someone is willing to school me in doing this.


Mic spec: http://www.audio-technica.com/cms/resource_library/literature/12b232f828e57900/u857q_u857ql_submit.pdf





Transmitter spec:  http://pubs.shure.com/guide/UR1M/en-US?_ga=2.185612205.581055229.1510674947-785598591.1510674947





Thanks,
Chris
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Tim McCulloch

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Re: Need to convert Lo-Z gooseneck to Shure wireless transmitter
« Reply #1 on: November 28, 2017, 01:20:14 pm »

The transmitter pack supplies only 5v of bias voltage whereas the A-T gooseneck requires 12v of phantom power.  There is more than matching impedance.
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"Practicing an art, no matter how well or badly, is a way to make your soul grow, for heaven's sake. Sing in the shower. Dance to the radio. Tell stories. Write a poem to a friend, even a lousy poem. Do it as well as you possible can. You will get an enormous reward. You will have created something."  - Kurt Vonnegut

Chris Kovic

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Re: Need to convert Lo-Z gooseneck to Shure wireless transmitter
« Reply #2 on: November 28, 2017, 02:37:42 pm »

The transmitter pack supplies only 5v of bias voltage whereas the A-T gooseneck requires 12v of phantom power.  There is more than matching impedance.

Is the technicality of this remedy alleviated if I put in portable battery powered phantom supply unit?


Thanks,
Chris
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Tim McCulloch

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Re: Need to convert Lo-Z gooseneck to Shure wireless transmitter
« Reply #3 on: November 28, 2017, 02:41:44 pm »

Is the technicality of this remedy alleviated if I put in portable battery powered phantom supply unit?


Thanks,
Chris

Yes.

I take it you need a "wireless" lectern and already own these items.  My preference is to use unmodified mics with XLR connectors and a Sennheiser or Lectrosonics "butt plug" transmitter that supplies phantom power but that approach means spending $ you may not have in the budget.

I suggest you contact both Audio-Technica (call them, not email) in Stowe, OH and also contact Shure's engineering support group (email works) about your proposed use.  They'll provide specific guidance.
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"Practicing an art, no matter how well or badly, is a way to make your soul grow, for heaven's sake. Sing in the shower. Dance to the radio. Tell stories. Write a poem to a friend, even a lousy poem. Do it as well as you possible can. You will get an enormous reward. You will have created something."  - Kurt Vonnegut

Mark Mattocks

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Re: Need to convert Lo-Z gooseneck to Shure wireless transmitter
« Reply #4 on: November 28, 2017, 03:03:39 pm »

Since the AT mic is a Q series with XLR out, the Shure WA310 cable with a phantom power supply module will do what you need.
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Geert Friedhof

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Re: Need to convert Lo-Z gooseneck to Shure wireless transmitter
« Reply #5 on: November 28, 2017, 03:16:07 pm »

WA 310:

XLR pin 1 = TA4F pin 1 (cable shield)
XLR pin 2 = TA4F pin 3 (audio +)
XLR pin 3 = TA4F pin 1 (audio -)
No connection to TA4F pin 2 or pin 4
« Last Edit: November 28, 2017, 03:21:39 pm by Geert Friedhof »
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Chris Kovic

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Re: Need to convert Lo-Z gooseneck to Shure wireless transmitter
« Reply #6 on: November 28, 2017, 04:41:55 pm »

WA 310:

XLR pin 1 = TA4F pin 1 (cable shield)
XLR pin 2 = TA4F pin 3 (audio +)
XLR pin 3 = TA4F pin 1 (audio -)
No connection to TA4F pin 2 or pin 4

Thanks all! Good suggestions here.


Chris
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ProSoundWeb Community

Re: Need to convert Lo-Z gooseneck to Shure wireless transmitter
« Reply #6 on: November 28, 2017, 04:41:55 pm »


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