Es Season seems to have arrived

[k6dgw]

Kevin, KD5ONS, is 569 running ECN on 14050.5 in N. Cal  From that and
all the 6m spots, looks like summer Es has finally arrived

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2011 Cal QSO Party 1-2 Oct 2011
- www.cqp.org
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[Tony Estep]

Thanks to those who commented on the sporadic-E on 6M. I have never operated
6M except for a couple of months in 1959. On the few occasions that I've
checked it, it was always dead as a doornail. After reading the posts on
here today I checked, heard a bunch of signals and using my 10-meter antenna
I worked a few stations, including Puerto Rico. That was fun. So even though
it may have been way off-topic, I appreciate the guys who pointed this out.

Tony KT0NY

On Sun, May 22, 2011 at 5:02 PM, Fred Jensen <[hidden email]> wrote:

> Kevin, KD5ONS, is 569 running ECN on 14050.5 in N. Cal  From that and
> all the 6m spots, looks like summer Es has finally arrived
>
>
>
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Operating conditions are never off topic on this Reflector.  I enjoy  
hearing how the bands are performing whenever possible.
    73,
       Kevin.  KD5ONS


On Sun, 22 May 2011 15:21:05 -0700, Tony Estep <[hidden email]> wrote:

> Thanks to those who commented on the sporadic-E on 6M. I have never  
> operated
> 6M except for a couple of months in 1959. On the few occasions that I've
> checked it, it was always dead as a doornail. After reading the posts on
> here today I checked, heard a bunch of signals and using my 10-meter  
> antenna
> I worked a few stations, including Puerto Rico. That was fun. So even  
> though
> it may have been way off-topic, I appreciate the guys who pointed this  
> out.
>
> Tony KT0NY
>
> On Sun, May 22, 2011 at 5:02 PM, Fred Jensen <[hidden email]> wrote:
>
>> Kevin, KD5ONS, is 569 running ECN on 14050.5 in N. Cal  From that and
>> all the 6m spots, looks like summer Es has finally arrived
>>

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[Jim Brown-10]

On 5/22/2011 3:02 PM, Fred Jensen wrote:
>  From that and
> all the 6m spots, looks like summer Es has finally arrived

Yes. In less than a half hour I made three double-hop Qs -- from my QTH
near San Francisco to Ohio (near Cleveland), WV (near Charleston), and
TN (near Bristol, in the Smokies.  That in addition to some single hops
to UT and CO. Four new grids. 100W and 4 elements. All CW.

73, Jim K9YC
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[g3ymc]

Sporadic E does not really affect 20m. As for sporadic E, it is as per
its name 'sporadic'. Saturday here in Europe was excellent and I had
good fun on 10m. Yesterday it was a total anticlimax with the bands
being pretty flat again.

(and it looks as if the discussion on the new box has now finished, far
less posts to delete here this morning - actually auto filtered in
Mailwasher. It is becoming ever more obvious that we need seperate
lists for seperate products, only the K2 interests me).

73 Dave G3YMC

On 22 May 2011 at 15:02, Fred Jensen wrote:

> Kevin, KD5ONS, is 569 running ECN on 14050.5 in N. Cal  From that and
> all the 6m spots, looks like summer Es has finally arrived
>


http://www.davesergeant.com

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[Bill W4ZV]

g3ymc wrote

Sporadic E does not really affect 20m.

N6BV makes a good case that Es on 10m-20m was a factor in the extremely high number of EU QSOs (ITU Zone 28/29) experienced by the competitors near Moscow at the WRTC in 2010.  He does this by comparing VOACAP predictions using F2 only versus F2 plus Es.

November 23  HF Propagation and Sporadic-E, a Case Study: WRTC 2010 - Dean Straw - N6BV

http://pvrc.org/webinar/webinars.htm 

(click Nov 23 above for full webinar or the link below for slides only in .pdf)

http://pvrc.org/webinar/hfprop.pdf  (slides 49, 53 & 54 for 20m data)

"How Important was “Short Skip” Es on 20-10 Meters in WRTC 2010?"

"R33M made 1,080 (47%) of their non-ground-wave QSOs in Zones 28 and 29 on 20/15/10 meters. This strongly suggests that short-skip Es was present on the higher bands!"

73,  Bill

[k6dgw]

On 5/23/2011 3:33 AM, Bill W4ZV wrote:

>
> g3ymc wrote:
>>
>> Sporadic E does not really affect 20m.
>>
>
> N6BV makes a good case that Es on 10m-20m was a factor in the extremely high
> number of EU QSOs (ITU Zone 28/29) experienced by the competitors near
> Moscow at the WRTC in 2010.  He does this by comparing VOACAP predictions
> using F2 only versus F2 plus Es.

Perhaps the trap here is "sporadic," and maybe I fell into that trap by
calling it "Es" to be short.  There really is a non-sporadic E-layer,
generally around 100 Km high, formed by longer wavelength X-rays and
hard uV from the sun.  At that height, the atmospheric density is high
enough that recombination proceeds at roughly the same rate as
ionization, so generally, and especially in the winter when solar
radiation is more oblique, the E layer is weak at best and disappears
completely at night.  In the summer [either hemisphere], it is stronger
and can begin to reflect [or refract] frequencies up to about 10 m.  Es
OTOH is very highly ionized [and small and very temporary] patches in
the E-layer which accounts for many summertime 6m openings.

Kevin is about 770 Km from me.  On 20, he is at best just discernible in
the winter, but is reliably S6-8 in the summer at ECN-20 time [1500 PDT
which is really 1400 for the sun].  I've always assumed this was E-layer
propagation.  It certainly could be some other effect that is just
positively correlated with summer, and of course, correlation does not
imply cause.

In Jun 2008, with my brand new K3 [#642], I decided to see if it really
worked on 6m.  The ATU matched my tribander, and I heard KH6FI calling
CQ on SSB at about S6.  I called him, he gave me 56, on a 3,900 Km path.
  I don't know what that propagation mode was, possibly multi-hop
E-layer?  Maybe F2, I don't remember the SFI.  Incidentally, that is the
only 6m QSO I've ever made in 57 years as a ham.  In fact, it's the only
time [to my knowledge] my call has been on 6m.  At any rate, it is
summer, and for whatever reason(s), six meters is opening a lot.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2011 Cal QSO Party 1-2 Oct 2011
- www.cqp.org
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