[600MRG] 630m noise

[J Mcvey]

 I don't know how wide or fast the drift is, but it could also be tackled by using a High Q audio notch-even an adjustable one before the audio enters the computer for processing. Maybe your SDR has some options?

However if the carrier is of sufficient strength to desensitize the the rx , then an RF solution is needed. However, I'd explore simpler solutions than building a whole phased array system first...but that's lazy me...

    On Monday, January 6, 2020, 12:39:35 PM EST, Edward R Cole <kl7uw at acsalaska.net> wrote:  
 
 Yep.  Most of us are stuck with some kind of short vertical. Mine is 43 by 122 foot inverted-L, base loaded with humungous coil. But it works: 100w produces 4w EIRP.  I tried a 1/4 WL BOG and noisefloor was 20-dB less but so were the signals.  I ran it parallelwith my neighbor's 3800-foot airstrip but had to remove it for heavylumber equipment access.  I do plan to make a 6-foot rotating loop(someday).

My eme projects taking too much of my time.

73, Ed

At 07:59 AM 1/6/2020, Dave Riley via 600MRG wrote:

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Thanks all, and more food for thought..  This question is relatedto a storm which we recently endured.. The litz loop was lost so aresurrected 50' vertical is fed with a somewhat unorthodox feed but itworks fine, still just one piece of wire and one tuning cap... Also, the beverage works fine on RX  but I can't steer it, so amusing 80m Windom for the noise antenna..

The so called drifting noise carrier and it's upper sidebands only botherme @ 475.7 RX so putting a notch there didn't help..

Long story ( question ) short; what is the gain or loss ofa 50' vertical @ 475 khz.?? Works wunnerful on 160/80!! OY!!

So that is .025 wave length @ 475K,  1970' full wave..

TNX all, from DaveR @ aa1a




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 73, Ed - KL7UW
 http://www.kl7uw.com
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