[TowerTalk] Spurs and Harmonics new antenna

[bill thomas]

>From: Chris BONDE <ve7hcb@rac.ca>
>To: "bill thomas" <k1xt@hotmail.com>
>CC: towertalk@contesting.com
>Subject: Re: [TowerTalk] Spurs and Harmonics new antenna
>Date: Wed, 05 Dec 2001 16:44:01 -0800
>
>
>This I like!!  Whar frequency?  If we had the correct frequency, maybe we
>would not need 1KW out.
>
>Chris opr VE7HCB
>
>At 10:49 AM 2001-12-05 -0600, bill thomas wrote:
>
>
>
>
>>>From: w5kft@nts-online.net
>>>To: Towertalk@contesting.com
>>>Subject: [TowerTalk] Spurs and Harmonics new antenna
>>>Date: Wed, 5 Dec 2001 09:59:54 -0600
>>>
>>>
>>>
>>>         I installed a new 75 meter delta loop on Tuesday.  Its 265 feet
>>>total length, cut for 3.795 khz.  SWR is acceptable, less than 2.0
>>>to 1 on that freq.
>>>
>>>         Problem is that when using this antenna I have a spur or
>>>harmonic every 10 khz across the 75 meter band.  All the way from
>>>3500 up to 4000 the spur can be heard every 10 khz starting
>>>exactly on 3.500, in the DX window 3770-3780-3790-3800 the
>>>sput peaks at about 30 db over S9.  All connections on the
>>>antenna, coax and fittings check solid.
>>>
>>>         The delta loop is hung from the top of a 80 foot tower that also
>>>has a HyGain TH11 and Cushcraft 402CD on it.
>>>
>>>         Weird thing is that if I key the transceiver (TS-940SAT) the 
>>>spur
>>>will go away for about 2 seconds and then returns again.
>>>
>>>         OK you list guru's.....what are your ideas and suggestions, this
>>>one has me stumped.  Any suggestions on how to find the source
>>>and cure this problem would sure be appreciated....
>>>
>>>Bryan W5KFT
>>
>>I think you have something very nearby, perhaps in your own house, that is
>>emitting the spurs.  Perhaps it's a television or computer monitor or God
>>knows what.  As for transmitting and disrupting the source, I had a
>>similar experience.  A few years ago I had a neighbor who had a touch lamp
>>that caused me grief with the noise that it emitted.  I found that if I
>>keyed the transmitter at about a KW it would disappear. I was actually
>>turning it off with my signal.  A month went by, and then I never heard it
>>again.  They got rid of it.  I wonder why?  Good luck.
>>
>>Bill K1XT
>>

"Whar frequency?"  Just what do you mean?  Read the thread.

_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp


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