Topband: Solar Flux Question

[Bill Stewart]

Tnx Dave for the info. I have also noted nights with some strong EU
stations and the next night nothing heard...SFI staying the same. To
clarify, I run 100w and an inv. L and no special receive antennas.
So far this season I have made it into VK about 8 times and worked a
few EU stns as well. Most of this was done with the lower SFI values.
I have also noticed, on the DX Maps site, that ten mtrs has been open
some. Appears the higher SFI might help the higher bands, but little
or nothing on 160m. Interesting.
tnx Dave..73 de Bill K4JYS

----- Original Message -----
From: "Artek Manuals" <Manuals at ArtekManuals.com>
To: "topband" <topband at contesting.com>
Sent: Friday, November 6, 2020 3:55:23 PM
Subject: Re: Topband: Solar Flux Question

Bill

Last night ON 160 I worked 32 European and SA stations with the reported 
SFI of 88.  earlier in the week with a similar SFI number I heard 
nothing from EU on 160. Conclusion : At these levels SFI is not the factor

Conditions on 15 and 12 have been for the last week or so been great . 
Lots of long path on 40 through 15 depending on the time of day & band. 
certainly far better than a year ago at SFI of 68-72 on the upper bands, 
on 160 and 80 hasn't been much of factor so far

DAVE
nr1dx


On 11/6/2020 3:23 PM, Bill Stewart wrote:
> Per WWV, the solar flux is at 91. What, if any, affect does this have on propagation in HF or other
> frequency bands....and of course 160 meters. I have seen these geophysical numbers often, but
> never really understood what they meant. The flux has been running in the high 60s/low 70s until
> a few weeks ago when I saw it in the 80s.
> Tnx de Bill K4JYS
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