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Re: Topband: DX Conditions

To: topband@contesting.com
Subject: Re: Topband: DX Conditions
From: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Wed, 24 Jan 2024 12:59:33 -0500
List-post: <mailto:topband@contesting.com>
On RBN Sensitivity/Antennas:
Whenever I CQ-d from any of our Pacific operations -- FO/M, FO, VP6A, E51D, KH8, KH8S -- I always had the RBN screen on. Most of the time I would be working stations in the mid-west, or even the East Coast, before the first RBN report would pop up, if at all. As Steve points out, they do not have high performance RX antennas for 160 m and you can not rely on them to indicate weak openings. Of course, if you see your call on the RBN, the band is solidly open.

73,
George




On Tue, 23 Jan 2024 21:24:52 -0800 Steve Harrison  wrote:
On 1/23/2024 10:31 AM, Roger Kennedy wrote:

Regarding RBN . . . are there many decent 160m receiving sites in Florida .. . 
or even in the Mid-West or West Coast?
There are over two dozen RBN setups west of our Mississississippi River, 
including VE; I don't rember seeing many in FL but then, I don't look for those 
when I'm watching the RBN. ZF9CW is a good, sensitive setup down in the Carib 
that I do look for, however. One of the more-sensitive out west may be W6YX, 
another VE6WX, both with at least two reporting receivers. There are several 
others at large contest stations such as ND7K who seem to report much less 
frequently. There are even several KH6 stations on the RBN. BUT...

It's just that nearly all the North American 160m RBN sites that show 
usEuropeans are mainly all in the North-east . . . yet often you will 
haveactual QSOs with stations further west.
You have to rember that MOST "serious" 160 ops are using low-noise antlers such 
as Bevs or Flags, when they give out those 559 or 579 reports to you Euros. The RBN 
stations are invariably NOT using such sensitive (and directive) antlers; so of course, 
they're only going to hear what their low elevation, RBN-receiver antlers are hearing, 
amongst their local noise. Thus, it's rare that I see a west coast station report even a 
JA, let alone 9M2AX or similar, never mind in-the-noise European. Rember: the signal must 
be a dB or more out of the noise, long enough to copy a complete callsign at least 
several times, before it will even consider reporting you.

Steve, K0XP


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