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Bias-t voltage

Posted: Fri Nov 09, 2018 10:24 am
by PD1ET
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...

Re: Bias-t voltage

Posted: Fri Nov 09, 2018 4:33 pm
by DanubeBCL
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

Re: Bias-t voltage

Posted: Wed Nov 14, 2018 12:03 pm
by SDRnerd
There are miniwhip designs with low voltage operation. Beware that the current limit is only 45 mA on the bias-T!

73' Ron

Re: Bias-t voltage

Posted: Wed Nov 14, 2018 12:34 pm
by g1hbe
Ron, isn't the max current 100mA?

Re: Bias-t voltage

Posted: Wed Nov 14, 2018 3:51 pm
by Tech_Support
Hello folks,
Yes it is 100mA.

Sincerely

Tech_Support

Re: Bias-t voltage

Posted: Wed Nov 14, 2018 8:22 pm
by vk3alb
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