[SADXA] 40m DAY DX of a Yagi vs K07SS CW Skimmer on a Dipole -Dec. 2nd

[W7EXG (Bill)]

Hi Dave,

You bring up excellent points for KO7SS's use with Dipoles and Verticals.   

It again shows the varied value of a CW skimmer in one's "backyard". 

Jim W9FI pointed out that if mountains are between you and DX, then the
KO7SS EU spots may not be heard, but in other directions perhaps has more
value. 

Consider another value for those with antenna gain: 
IF KO7SS reports 40m DAY DX [such as OT4A on 7003 @ 2055z 29 Nov (SN + 1:45
min), it is also likely that those with Gain Antennas will hear much more
and have much greater success than the KO7SS spot is indicating.  

If KO7Ss ever reports 40m DX within 1 Hr of SN, it's going to be a field day
for all on 40m. 

Thanks for your input, and hope you enjoy your new QTH. 

BTW, if your QTH is further north, you will be closer to the terminator with
less D absorption yet still in the 40m corridor. You might find 40m DAY DX
at the new QTH will be much better than in Tucson, this December. 

73's
Bill W7EXG
-----Original Message-----
From: sadxa-bounces at mailman.qth.net [mailto:sadxa-bounces at mailman.qth.net]
On Behalf Of w7aqk at cox.net
Sent: Tuesday, December 03, 2019 5:14 PM
To: 'Southern AZ DX Association E-Mail Reflector'
Subject: Re: [SADXA] 40m DAY DX of a Yagi vs K07SS CW Skimmer on a Dipole
-Dec. 2nd

Bill and All,

That may be true.  However, I have been very surprised at the similarity
between what KO7SS could hear and what I could hear with my R8 vertical.
Surely not 100%, but close enough that it has been a real benefit for me as
to what's on/workable and what isn't!  Perhaps the more important thing was
that if KO7SS could NOT hear a station, then I almost certainly could not
either!!!  When a DX station was reported on one of the DX Clusters I would
often check to see if KO7SS could hear it, and if not, I would waste a lot
of time trying to hear it myself.  It was pretty accurate!  I'll miss being
able to use that skimmer.  Hope I find another one in my new QTH that is as
reliable. 

 Dave W7AQK

P.S.  Hitting the trail for Oregon this morning!  

D.

-----Original Message-----
From: sadxa-bounces at mailman.qth.net <sadxa-bounces at mailman.qth.net> On
Behalf Of Jim Wysocki
Sent: Monday, December 2, 2019 9:31 PM
To: sadxa at mailman.qth.net
Subject: Re: [SADXA] 40m DAY DX of a Yagi vs K07SS CW Skimmer on a Dipole -
Dec. 2nd

Bill, you'll need to take the KO7SS skimmer spots with a grain of salt. Just
because they log a call doesn't mean that some of our members will be able
to hear it.

I recently was over to Bill's place on Mt. Lemmon where he has the skimmer
and the dipoles. The antennas are near the top of the mountain, about 45
feet above the terrain, and with the one I saw having a clear view towards
Europe.  I don't recall seeing a second antenna but it could have been
there.  The net effect of the extra work is that Bill's skimmer can hear
some of the stations that he can't copy down at his QTH in the city.  So if
somebody is well-situated, i.e., far enough away from the mountains that the
low angled signals can be received, he should be able to hear some DX that
others of us who are too close to the mountains can't even detect.

73, Jim  W9FI

On 12/2/2019 6:45 PM, W7EXG (Bill) wrote:
> The following 40m DAY DX was heard CALLING CQ in Tucson Dec. 2nd, from 
> about 2145z to 2245z on my DB42 3 ele 40m Yagi on a 42 foot boom.
>
> ON4YOTA
> ON6DC
> F6BII
> R7DC
> CT9/DL5AXX
> CT1ZQ
> SP9FV
>
> The following 40m DAY DX was heard CALLING CQ in Tucson Dec. 2nd, from 
> 2145z to 2245z on KO7SS CW skimmer dipoles.
>
> NONE of the above.
>
> Although K07SS did not record the above 40m DX, it has recorded in the 
> past 40m DAY DX in this time frame. Thus, 40m DAY DX is still quite 
> possible with a dipole. Such 40m DAY DX has already been recorded here 
> on dipole type 40m antennas.
>
> 73'S
> BILL W7EXG
>
>
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