[TowerTalk] Baluns/tutorial/notes.

[Joe Subich, W4TV]

 > On which equipment/software/DUT does one see SWR<1?

AIM 2170 - for example:
   http://www.balundesigns.com/catalog/1-1%205kw%20Scan.jpg

Note the SWR scale on the left vertical axis ... all the
way down to 0:1.

73,

    ... Joe, W4TV

On 5/22/2010 9:49 AM, Ian White GM3SEK wrote:
> 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?
>
>
>