[Lowfer] KA7OEI on 2200m in EN90

Clint Turner turner at ussc.com
Sun Dec 10 15:36:39 EST 2017


Thanks Mike for spotting my signal.

Yesterday I went around with a large spool of wire and ran some 
perimeter ground wires around my (rather small) suburban lot which 
seemed to improve the signal receive by a local (about 40 miles north) 
by a couple dB - and I've noticed that the previous 16-22dB difference 
between my signal and WH2XXP has reduced a bit to something closer 
8-14dB, depending on phase of the moon, etc. This morning, with the 
(very) unseasonably warm weather I was outside, bonding the sections of 
my chain link fence to further tie things together and improve the 
extent of the ground system.

I've not noticed a huge difference in antenna current (its about 1 amp, 
more or less) after all of this "bondage" of radials, fences, etc. but 
the remote spots indicate that there are gradual improvements.  It will 
take some burying of wires to make much difference - but I probably 
could improve the vertical portion of the radiator (the window line of 
my HF "lazy loop" and get it a bit higher - and wind a Litz wire loading 
coil for 2200 (I have enough 660/42 Litz to do this) to replace the 
current one that is wound with 22 AWG stranded - which runs very 
slightly warm.

A few details on my MF/LF station may be found here: 
http://ka7oei.blogspot.com/2017/12/now-qrv-on-630-and-2200-meters.html

Still lots of room for improvement!

73,

Clint
KA7OEI
(Also MedFER "CT" - not online at the moment...)


On 12/10/2017 11:57 AM, Michael Sapp wrote:
> Thanks Garry: I was watching the waterfall at the time working on a rx 
> filter project. At first I thought it was XND but it did not seem to 
> be in the right place, Ron's signal usually shows
>
> up a bit lower in frequency...so I was able to grab a screen shot...
>
> https://www.dropbox.com/s/0chw2vlwaij3g1f/IMG_0959.JPG?dl=0
>
> Exceptionally quiet at the time with no local in-band QRN sources and 
> pretty much only  120 to 150 kHz energy making it to the mixer in the 
> LF converter...about half of that
>
> energy in 7~8 kHz bandwidth centered on 137.5 kHz...
>
> Currently 137 kHz fairly polluted with in-band switcher noise, which 
> my best guess is hash from neighbor's cloths and dish washing machines 
> from the periodic mid-day nature of
>
> how the QRM shows up.   Also caught WA9CGZ mid-day here for the first 
> time this afternoon, lower atmospheric temps seem to have an impact on 
> noise level....and/or the rx filter is working exceptionally well...or 
> some combo thereof...
>
> https://www.dropbox.com/s/y2guuiakblfc3i2/IMG_0961.JPG?dl=0
>
> The CGZ captures may have occurred without the background noise as I 
> was out to lunch at the time and the waterfall capture was around 1830 
> UTC vs 1700~1800 for the CGZ captures....
>
> Mike, tts
>
>
> ----- Original Message ----- From: "Garry" <k3siw at sbcglobal.net>
> To: <lowfer at mailman.qth.net>
> Sent: Sunday, December 10, 2017 11:59 AM
> Subject: Re: [Lowfer] KA7OEI on 2200m in EN90
>
>
>> Nice copy Mike. I noticed conditions to the NW were up last night but 
>> was monitoring DGPS and the lowfer watering hole instead. Nice to 
>> know the signal is making it so far east.
>> -- 
>> 73, Garry, K3SIW, EN52ta, Elgin, IL



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