Are you *sure* this isn't just good, old fashioned, front end overload?
BC boys run lots o'poop out the pipe, so it can amount to a lot of RF at
the mixer.
Maybe your antenna is now just enough better that the
poor front end is buckling under the strain. This happened to me once... a
better
antenna caused everything from DC to daylight to go crap. It had me completely
confused as to why my new, killer antenna sounded so noisy. After a few
minutes I decided to tune in WWV @ 10.0 MHz just to have an anchor of
some kind in the midst of the confusion. When I heard Mexican polka music it
was a real "ah ha" kind of moment.... especially since I hadn't heard of any
plans on the part of NIST regarding a change in programming....
73, Dave N6NZ
Oh yea, the fix: Just plug in your good old band-pass filters that you use
for multi-transmitter operations.
At 05:06 PM 10/1/01 -0600, you wrote:
>TT
>
>I have final got my tower to radiate reasonably well on 80m .... 160 is
>next. I find that I have a lot of noise from local AM stns on 80m. There is
>no noise from on the 80m inverted vee. In fact, with the vertical the
>daytime noise is > S3-4 across the 80m band and in certain spots like 3.650
>MHz I have S9+20db with 3 or 4 local stations mixed together (my rx is an
>ICOM 736). I found that if wound 60 ft or so of coax into a choke with a
>diameter of approx 3 ft and put it in the feedline near the base of the
>tower the noise is substantially reduced. The daytime noise drops to < S2
>and the noise at 3.650 MHz is reduced to < S4-5.
>
>Question:
>
>What is the most effective way to handle this problem?
>
>.. sylvan
>
>----------------
>Sylvan Katz, VE5ZX
>Saskatoon, SK
>
>
>
>List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
>Trylon Titan towers, coax, hardline and more. Also check out our self
>supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
>
>-----
>FAQ on WWW: http://www.contesting.com/FAQ/towertalk
>Submissions: towertalk@contesting.com
>Administrative requests: towertalk-REQUEST@contesting.com
>Problems: owner-towertalk@contesting.com
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|