[TowerTalk] impedance measuring antennas

Richard (Rick) Karlquist richard at karlquist.com
Fri Mar 6 12:38:30 PST 2009


This works at HF.  Probably not too accurate at UHF.

Rick N6RK

John Lyles wrote:
> Rick
> I wasn't serious, tongue and cheek humor about calibrating a VNA for tower top measuring. Do you use phase stable coax, as you lay it down, roll it up or haul it up a tower, doesn't that shift a tiny bit (esp at UHF?). 
> John
> K5PRO
> 
> -----Original message-----
> From: "Richard (Rick) Karlquist" richard at karlquist.com
> Date: Fri,  6 Mar 2009 14:13:45 -0700
> To: jtml at vla.com
> Subject: Re: [TowerTalk] impedance measuring antennas
> 
>> When I install antennas, I perform this calibration for the coax on the 
>> ground and store the cal file on my laptop.  It is not necessary to
>> recalibrate every time you measure.
>>
>> Rick N6RK
>>
> 
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