Towertalk
[Top] [All Lists]

[TowerTalk] 1.8 MHz half sloper using tower VSWR question

To: <towertalk@contesting.com>
Subject: [TowerTalk] 1.8 MHz half sloper using tower VSWR question
From: kg5u@hal-pc.org (Dale L Martin)
Date: Tue Feb 18 18:56:55 2003
You mean I should stop laying the ground pipe system?

>
> I think there may be some math errors in computing your SWR.  Unless I am
> mistaken, The lowest possible SWR is 1:1, so if you are getting 0.2 to one
> something is wrong with the formula you are using.
> Regards,
> Ken W7TS
>

>

> This antenna is showing a very unusual bandwidth that spans from 1.800
> MHz to 1.950 MHz with a VSWR of 2.0 to 1 or below and a minimum of 0.2
> to one on 1.870 MHz and 1.880 MHz, this seems to be unusual for these
> band, since I don't recall having any previous 160 meters antenna  with
> such a large bandwidth, below is the VSWR table.
>
> 1.800 2.0 to 1
> 1.810 1.7 to 1
> 1.820 1.6 to 1
> 1.830 1.4 to 1
> 1.840 1.3 to 1
> 1.850 1.3 to 1
> 1.860 1.1 to 1
> 1.870 0.2 to 1
> 1.880 0.2 to 1
> 1.890 1.1 to 1
> 1.900 1.2 to 1
> 1.910 1.4 to 1
> 1.920 1.5 to 1
> 1.930 1.7 to 1
> 1.940 1.8 to 1
> 1.950 2.0 to 1
>
> At 1.870 MHz and 1.880 MHz the impedance if of 47 ohms.
>
>

<Prev in Thread] Current Thread [Next in Thread>