http://elecraft.85.s1.nabble.com/K3-SWR-Numerical-Indication-tp7643839p7646750.html
The Elecraft list does not accept attachments. Send to me directly.
> Hi John,
>
> Per your suggestion, I ran a sweep of my 40 meter vertical with the K3 /
> K3EZ software.
>
> I then measured at ~20 kHz steps with my MFJ-259B.
> Both sets of measurements were taken from the PL-259 that plugs into the rig
> or 259B.
>
> Conditions were ~60 degrees F, ground nearly saturated.
>
> Attached is an image of the results.
>
> Kindly,
> Dick - KA5KKT
>
> ----------------------------------------------------------------------------
> -----------
>
> Hi Dick,
>
> An EZNEC and SimSmith model of the on ground 1/4 wave vertical:
>
https://www.kn5l.net/images/SS-KA5KKT-vertical.png>
> SimSmith R1 represents ground loss, the value set to establish a 50 ohm load
> at the transmitter, G in SimSmith.
>
> According to the models, the 7 to 7.3 MHz SWR is a little below 1.3.
>
> A flat measurement using the K3 SWR meter seams reasonable. My suggestion is
> to use a Antenna Analyzer to measure the antenna and system.
>
> John KN5L
>
> On 12/2/18 12:16 AM, Dick Dickinson wrote:
>> I have a full-size monoband vertical for 40 meters. Simple
>> architectural aluminum tapering from 1 �� (?) in 6� telescoping
>> sections. The radial field is designed to provide a 50 ohm match at
>> the feed point�12 � 13�+ radials. It is fed directly�no matching
>> device with RG-213 from the remote antenna switch about 50� away at my
>> tower. The coax from the rig to the remote antenna switch is
>> estimated to be ~ 50� in length. A lot of the time running K3EZ to
>> sweep the band (typically 20 watts), it will indicate a
>> 1.0:1 SWR from 7.0 MHz to 7.3 MHz in 20 kHz steps. Occasional
>> deviation from one K3EZ run to another might be due to variations in
>> moisture content of the ground or less than perfect connection to the
>> vertical�an uncommon situation. The K3 shows the same readings.
>>
>> Is this 1.0:1 SWR across the entire 40 meter band curious or remarkable?