[TowerTalk] Ringo AR2 Problems

[w4lde]

Kip,

Look at (Joe W4TV) answer, I didn't read that original comment by you 
but you should have seen the short through the ring.

73 de Ron

On 3/11/2013 6:59 PM, Kipton Moravec wrote:
> I am testing the antenna on the ground held on a fiberglass pole about 8
> feet long, so the base is about 8 feet off of the ground and I am
> holding it up and standing under it.
>
> We have a 15 foot piece of RG8X attached to it. There are no other
> things in the path.
>
> That goes directly to an antenna analyzer that makes a graph of SWR. For
> +/- 50 MHZ centered at 146 MHz we get a straight line 10:1 SWR.
>
> We moved the tap a couple of times with no changes.
>
> It seems like there are no glued parts that could be assembled wrong.
> There is no short from center to ground. I get contact from the center
> pin of the PL-259 to the tip of the antenna.
>
> I have completely disassembled the antenna, and am using emery cloth on
> all the places metal meets metal. I am wondering what else I should do
> before I reassemble since I got it apart.
>
> Kip
>
>
>
> On Sun, 2013-03-10 at 20:34 -0400, w4lde wrote:
>> 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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>
>
>