And Robin is a guy who's been on these trips.
73, Jim K9YC
On 10/21/2022 11:06 AM, Robin wrote:
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@audiosystemsgroup.com>
To: <topband@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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