Topband: Topband - Stew Perry event just 48 hours away

[Robin]

And that period at and after sunrise is MUCH quieter considering that more than 
half of the directions for propagated noise sources have been reduced or 
eliminated.  Depending on where you are that reduction can be quite dramatic, 
again indicating the need for experienced topband operators on DXpeditions.- and 
operational planning that includes the "extra" time on the lowbands.  The time 
at sunrise +/- 2 hours is when the maximum possible number of expedition 
stations should be fully manned and active.  "Home" stations with directional 
advantages can benefit similarly if not subjected to "urban" noise floor 
limiting.

Robin, WA6CDR



----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <topband at contesting.com>
Sent: Friday, October 21, 2022 10:34
Subject: Re: Topband: Topband - Stew Perry event just 48 hours away


> On 10/21/2022 10:18 AM, Mark Connelly via Topband wrote:
>> DXpedition set-ups are typically at low noise coastal or high-altitude sites 
>> not near urban RF congestion. "Real" antennas, i.e. with decent gain and 
>> directivity, are typically used. For these reasons the short duration 
>> DXpedition receivers usually blow the doors off what "permanent" sites offer.
>
> YES! I often find that I can work the better expeditions QRP after the initial 
> rush has died down, even on Topband.
>
> Where this breaks down is when expeditions QSY from lower bands at the first 
> sign of daylight,  failing to understand that gray line propagation is usually 
> strongest on the daylight side of the terminator! On Topband, it's often great 
> for 30-45 minutes, on 80 it's an hour, on 40 it's two hours.
>
> 73, Jim K9YC
> _________________
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