Topband: BCB Filter (related to Antenna Analyzer question)

[Michael St. Angelo]

Rick,

900 feet? What type of coax are you using?

You could probably cancel out the coax by using a VNA like the AIM4170 of 
N2PKVNA and performing a OSL calibration at the antenna end. You would get 
lots of exercise walking back forth to to switch between the open, short, 
50ohm and actual load!

73,

Mike N2MS

----- Original Message ----- 
From: "Rick Karlquist" <richard at karlquist.com>
To: "Michael St. Angelo" <mstangelo at comcast.net>
Cc: <richard at karlquist.com>; "Mike & Coreen Smith" <ve9aa at nbnet.nb.ca>; 
<topband at contesting.com>
Sent: Saturday, October 17, 2009 12:28 AM
Subject: Re: Topband: BCB Filter (related to Antenna Analyzer question)


> Michael St. Angelo wrote:
>> Rick,
>>
>> Telepost makes a Digital Vector Wattmeter, model LP-100A, that also
>> measures
>> complex impedances when you transmit. If you can get your hands on one of
>> there you can try it.
>>
>> Mike N2MS
>
> I need to know the complex impedance of the antenna, not the
> impedance at the transmitter.  I don't believe the telepost
> system calibrates out cables.  Also, my transmitter is 900 feet
> from my antenna, so it is kind of impractical to make adjustments.
>
> Rick N6RK
>