On Fri, 21 May 2010 23:06:13 +0100, Steve Hunt 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.
That graph is quite similar to data I've seen for 14 bifilar turns on #61
that proved to be erroneous in our round robin test.
Remember, the AIM is a reflection-type analyzer, and 5K ohms is a long way
from 50 ohms, so very small errors become quite large when differenced.
73,
Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|
