Joe Subich, W4TV wrote:
>On 5/22/2010 4:10 AM, Ian White GM3SEK wrote:
>
>>> I'm still puzzled why Jim (K9YC) was questioning the accuracy of
>>> the Balun Designs impedance data. The chart shown here:
>>> http://www.balundesigns.com/catalog/1-1%205kw%20Choking%20Impedance.jpg
>>> doesn't seem to contain impedances that would cause significant
> >> errors on the AIM.
>>
>> But only if the AIM has been calibrated correctly! I don't feel
>> comfortable with CM choke measurements until the operator has shown
>> that he is aware of these issues, has taken the appropriate
>> precautions and has proved out his test setup at the 10k level.
>
>I'm also concerned with equipment/software that would display SWR
>of less than 1:1. Either the equipment/software designer does not
>understand SWR (in which case I would not trust the results shown
>by the equipment) or the operator does not know what he's doing
>(and again the results can not be trusted).
>
On which equipment/software/DUT does one see SWR <1?
--
73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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