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Re: [TowerTalk] 30 Meter Propagation

To: Lee Buller <>,TowerTalk <>
Subject: Re: [TowerTalk] 30 Meter Propagation
From: Red <>
Date: Mon, 30 Jan 2006 14:46:20 -0600
List-post: <>
Hi Lee;

I've been recording the critical frequency, F2, (foF2) for nearly a 
year, hourly.  MUF is approximately equal to foF2 times the secant of 
the take off angle, where the foF2 is the value at the midpoint of a 
single hop propagation.

The AVERAGE foF2 for December and January in SE MN peaks at 6.5 MHz at 
1800z, drops to 3.7 MHz at 0000z, and to 2.4 MHz at 0400z.  I haven't 
calculated the standard deviations, but the range is within ±2 MHz.

I obtain raw data from:

and processed data, experimental,  from

73 de WOØW

Lee Buller wrote:

>  I've been fooling around with 30 meters and found that the band seems to 
> fold around 7 to 8 pm in the plains states.  I have a dipole up and can work 
> most anywhere when the band is in.  I have not been following the MUF, but is 
> the band not being worked by people or is the MUF so low that the band folds?
>  Lee
>  K0WA


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