Kip,
Where are you reading the SWR from? at the antenna or back in the
shack? Three is no LP, HP filters, lighting protection devices in feed
line is there? If so did you eliminate them?.
What happens after you move the tap point on the ring, SWR change?
Anymore info on how you are testing the SWR would help us.
73 de
Ron W4LDE
On 3/10/2013 8:19 PM, Kipton Moravec wrote:
I was given a used Ringo ARX2B antenna.
I checked out the manual and set the three measurements to 145 MHz. When
I tried to tune it, the SWR was 10:1 +/- 50 MHz around 146 Mhz.
The piece of coax looked weathered and I checked it out and it was fine
with the Ohm Meter and did not seem to change SWR or Ohms when I flexed
it. But I replaced it anyway.
Found their was no contact through the hair pin to the upper section
from the Ohm meter. So I replaced the screws and got a good connection
according to Ohm Meter.
I checked the connections from the end of the coax to all the points on
the antenna, and it worked as expected with the Ohm Meter. No unexpected
opens or shorts.
When I tried the analyzer, I still had a 10:1 SWR for +/- 50 MHz around
146 MHz.
So now I have disassembled everything and an using emery cloth on all
the connections and replacing all steel nuts and bolts with stainless,
and replacing the brass nuts.
What else should I look at before I reassemble?
I really do not understand how I could have such a bad SWR unless I had
an open or a short -- which I proved I did not have before I
disassembled. I am not sure what else to look for.
The manual is here:
http://www.radiomanual.info/schemi/ACC_antenna/Cushcraft_ARX2B_user.pdf
Kip
AE5IB
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