[Antennas] CushCraft R-7 problems

[Robert G Strickland]

Hi, Jay...

Brand new!

...robert

On 12/27/2015 21:01, JK wrote:
> Is this a new and unused antenna???  Maybe a bad trap/coil
>
>
> Jay....NE2Q
>
>
> On Sun, Dec 27, 2015 at 01:29 PM, Robert G Strickland wrote:
>
>> I have put up a CC R7 and can't get it to "work." CC has replaced the
>> match box. Twice, I have taken it down, cleaned all connecting
>> surfaces and put it back up. I have a lot of mechanical experience,
>> and I'm generally satisfied that I assembled it correctly. Using an
>> MFJ256B at the antenna, there is no resonant frequency dip on 30m,
>> 17m, 15m and 12m; on these bands the SWR is generally flat in the 2.5
>> to 7.5 range. On 40m there is a distinct dip at 7.05 MHz with SWR
>> 2.5:1. On 20m there is a distinct dip at 13.850 MHz with SWR 2.5:1. On
>> 10m there is a dip at 27.500 MHz with SWR 2.3:1 . Also, when taking
>> these readings there was a slight breeze and the SWR measurements were
>> extremely unstable even though the vertical is guyed just below the
>> traps. Aside from the usual comments about verticals and CC in
>> particular, these results seem way out of line to me. A local ham has
>> one, and using the 256B shows results that generally agree with those
>> in the back of the assembly instructions. Any suggestions much
>> appreciated. Happy New Year to all.
>>
>> ...robert
>> --
>> Robert G Strickland, PhD ABPH - KE2WY
>> rcrgs at verizon.net.usa
>> Syracuse, New York, USA
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>

-- 
Robert G Strickland, PhD ABPH - KE2WY
rcrgs at verizon.net.usa
Syracuse, New York, USA