HFU HF Underground

General Category => General Radio Discussion => Topic started by: ChrisSmolinski on November 03, 2015, 1344 UTC

Title: Couldn't hear certain stations as usual last night? Here's why
Post by: ChrisSmolinski on November 03, 2015, 1344 UTC

http://www.radiohobbyist.org/blog/?p=1709 (http://www.radiohobbyist.org/blog/?p=1709)

Title: Re: Couldn't hear certain stations as usual last night? Here's why
Post by: John Poet on November 03, 2015, 1527 UTC

Excellent!  I was going to ask you about that, as it seemed exceedingly unusual for you in particular.

Title: Re: Couldn't hear certain stations as usual last night? Here's why
Post by: Oliver on November 03, 2015, 1605 UTC

Thank you for the explanation Chris.
I guess we never stop learning.

Title: Re: Couldn't hear certain stations as usual last night? Here's why
Post by: ChrisSmolinski on November 04, 2015, 1210 UTC

Early this morning, the foF2 value over Wallops Island was about 2.5 MHz. I can't recall when I have seen it that low before:

(http://i.imgur.com/YNJdHuT.png)

Title: Re: Couldn't hear certain stations as usual last night? Here's why
Post by: John Poet on November 05, 2015, 0626 UTC

Still very low, going lower than yesterday now.  CHU 3330 at 0624 UTC is down to S-3 with minimal audio.  Usually S-9 here all night.

I've added the realtime graph to my Favorites bar...

Title: Re: Couldn't hear certain stations as usual last night? Here's why
Post by: ChrisSmolinski on November 05, 2015, 1214 UTC

It dropped down to 2 MHz overnight.  I'm not sure what the foF2 height was, but assuming nominal values, the skip zone for 43 meters was probably on the order of 1,000 miles.

This morning CHU was weak but audible on 3330. 7850 was barely there, as was CFRX 6070. Now that the Sun is up, both are coming in well, about S9.

Getting some audio from Old Time Radio on 6770, but weak.