Jim, this sounds like a classic case of receiver front-end intermod
overload. It could be from that 10 KW station. To test this theory, place a
10 or 20 db attenuator between your receiver input and antenna, to see if
the signal disappears or diminishes greatly. If it does, I would then try a
high Q L/C notch trap circuit at the RX antenna input connection, tuned to
1550 khz. I'm assuming there are no other local high power stations in your
immediate area.
If placing the attenuator in your receive line doesn't reveal improvement,
another possibility is a loose (read rectifying) connection somewhere in the
N/S Beverage antenna system.
At 07:01 12/3/96 -0800, you wrote:
>I just read some comments about beverage problems and I can relate. Last
>weekend, I put up my 600' European beverage for this weekend's contest as
>well as for the fabulous DXing this winter season. It is fed with 250' of
>1/2 75 ohm hardline. I then turned on the RX and, low and behold, broadcast
>stations every 10Khz! This condition is true only on the European beverage.
>Neither the east coast beverage nor the JA beverage has this problem. Just
>to the south of my QTH about 3 miles is a 10KW broadcast station on 1550 Khz.
>
>Based on the configuration of my property, the European beverage runs about
>70 feet from the shunt-fed tower. However, the JA beverage does the same.
>
>I would like to tap the collective wisdom of the Lowbanders concerning this
>condition. Where do I start??? I suppose I could try shorting the shunt on
>the tower to see if there is some kind of coupling between the tower and
>beverage. BTW, I did try ferrite cores around the connector at the RX end
>of the feedline without any noticable difference.
>
>Any additional advise would be welcome as Friday is drawing near!
>
>73 Jim K9JF/7
>Vancouver, WA
>
>
>--
>FAQ on WWW: http://www.contesting.com/topband.html
>Submissions: topband@contesting.com
>Administrative requests: topband-REQUEST@contesting.com
>Sponsored by Akorn Access, Inc & KM9P
>
>
73, Dave - W5UN
My Home Page is at: http://web.wt.net/~w5un
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~ Merry Christmas 1996
--
FAQ on WWW: http://www.contesting.com/topband.html
Submissions: topband@contesting.com
Administrative requests: topband-REQUEST@contesting.com
Sponsored by Akorn Access, Inc & KM9P
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