[AMPS] MFJ-259B Question

[Michael Tope]

Hi Chuck,

One trick that Dick Frey suggested to me a long time ago was to tune the antenna
to 1:1 VSWR with an antenna matching unit, and then terminate the tuner input
with 50 Ohms. You can then measure the output impedance of the tuner with the
Autek. Assuming dissipative losses in the tuner are minimal, this output impedance 
should be the conjugate of the antenna's input impedance. 

Mike, W4EF..................................................

----- Original Message ----- 
From: "Chuck Counselman" <ccc@space.mit.edu>
To: <amps@contesting.com>
Sent: Wednesday, October 11, 2000 4:31 AM
Subject: Re: [AMPS] MFJ-259B Question


> 
> My $200 Autek "vector" (R & X) impedance meter also suffers from limited
> range, but its worst limitation is that it can't measure the impedance of
> my antenna because I live near a 50-kW, 1510-kHz, broadcast station.  The
> strong signal from this station overwhelms the Autek's detectors.
> 
> How can I best measure my antenna impedance?  A noise bridge?  A bridge
> excited at a high level by my transmitter?  All I care about are ham-band
> frequencies.
> 
> -Chuck W1HIS
> 
> 
> 
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> 


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