[Amps] close to off topic - how to read antenna R + jX ??

[Alek Petkovic]

G'day Dan,

The RF-1 does not actually read display impedance. It will show SWR only.

It can also be used to measure unknown inductance and capacitance. It does 
these things extremely well.

Using the RF-1 on the inductance or capacitance ranges whilst measuring an 
antenna will give you meaningless results as you have found out. It is not 
intended to be used in that way.

If you want to display R + jX, you will need a different machine. I think 
Autek also does one of these.

73,Alek
VK6APK

At 05:16 AM 27/02/2005, Dan Sawyer wrote:
>All,
>
>I have become interested in leaning more about what is actually going on
>at the antenna. I have a vertical and would like to measure it.
>
>First I have an Autek RF-1. It measures swr, Z, L, and C at a preset f.
>I am not certain what the L and C are reading. When I measure a 50 Ohm
>terminator at 7.2 MHz it actually reads a Z of 50 and an SWR of 1.0.
>However the L and C readings are of 2 uH and 2500 pf.  What are these
>actually measuring? The values are very close to those from the antenna.
>
>How can I actually measure the L and or C component of the antenna? If I
>use an impedance bridge at the frequency will it measure L (or C)?
>
>I hope this is close enough to topic.
>
>Dan
>
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