Bias-t voltage

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PD1ET
Posts: 2
Joined: Wed Jan 11, 2017 8:46 pm

Bias-t voltage

Postby PD1ET » Fri Nov 09, 2018 10:24 am

The bias-T supplies a voltage of some 5v to connected equipment. I mainly use a mini-whip antenna and that does not work at 5v -not properly anyway. A voltage of 9 to 12 v would be more usefull...
Last edited by PD1ET on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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DanubeBCL
Posts: 195
Joined: Sat Jul 02, 2016 12:39 pm

Re: Bias-t voltage

Postby DanubeBCL » Fri Nov 09, 2018 4:33 pm

PD1ET wrote:A voltage of 9 to 12 v would be more usefull...
And certainly more difficult and costly to be generated from a 5 V USB voltage.
73, Heinrich

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SDRnerd
Posts: 22
Joined: Sun Jan 07, 2018 6:29 pm

Re: Bias-t voltage

Postby SDRnerd » Wed Nov 14, 2018 12:03 pm

There are miniwhip designs with low voltage operation. Beware that the current limit is only 45 mA on the bias-T!

73' Ron

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g1hbe
Posts: 367
Joined: Sat Jan 17, 2015 3:28 pm
Location: Cheshire, UK

Re: Bias-t voltage

Postby g1hbe » Wed Nov 14, 2018 12:34 pm

Ron, isn't the max current 100mA?

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Andy

Tech_Support
Posts: 379
Joined: Mon Jun 01, 2015 7:00 pm

Re: Bias-t voltage

Postby Tech_Support » Wed Nov 14, 2018 3:51 pm

Hello folks,
Yes it is 100mA.

Sincerely

Tech_Support

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vk3alb
Posts: 29
Joined: Sat Jul 01, 2017 11:43 pm

Re: Bias-t voltage

Postby vk3alb » Wed Nov 14, 2018 8:22 pm

I think the reason for the 5V bias voltage is understandable.

As someone mentioned there are lower voltage circuits of the mini-whip https://www.g8jnj.net/activeantennas.htm

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Lou
VK3ALB


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