[time-nuts] Active antennas for a Thunderbolt...

Chuck Harris cfharris at erols.com
Mon Jul 30 23:47:49 UTC 2012


Ok, that's about what I thought you would do.  Since it isn't in a
controlled antenna farm, you get a functionality test, with an approximate
example of the gain.

Thanks!

-Chuck Harris

OBTW, any luck fixing bad antennas?

Azelio Boriani wrote:
> I use a small power supply to feed the antenna (use a bias tee) and a DC
> block for the analyzer input. I have made a quadrifilar helix for the
> analyzer output. Set a suitable frequency range (1400-1700) and test. Yes,
> I have (at work) an analyzer with the S-parameter test set, so that no
> directional coupler and no problems, moreover I have new antennae to test
> to make comparisons but the results are clearly visible and you can
> recognize a defective antenna. Usually customers send in questionable
> antennae and we can tell weather or not they are really unusable: lightning
> is the killer.
>
> On Mon, Jul 30, 2012 at 9:54 PM, Chuck Harris <cfharris at erols.com> wrote:



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