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LF: Re: 630m Spain

To: <[email protected]>
Subject: LF: Re: 630m Spain
From: "Alan Melia" <[email protected]>
Date: Wed, 19 Jun 2013 19:54:45 +0100
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References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hi Federico, there could be a number of reasons for your problems.
 
LF/MF does not travel as well in daylight as it does after dark. You are looking at a 1000km + path so you need good skywave. Operation after dark will give you about another 20dB at the receiver ar ranges greater than 700km
 
You may be running Maximum allowed power but on these bands it depends where that power is going. The radiation resistance and the loss are in series, and the Rrad is much smaller than the loss. You need to experiment with reducing the ground loss which is probably taking the majority of your available power. Halving the ground loss can in some circumstances give you four times the radiated power.
 
Good Luck
Alan
G3NYK
----- Original Message -----
From: Federico
Sent: Wednesday, June 19, 2013 6:46 PM
Subject: LF: 630m Spain

I've been three weeks calling CQ on the frequency of 472.5 kHz between 17 and 17.30 UTC
and listening to the band at different times of day without result.
Keep calling CQ between 17 and 17.30. I would appreciate even if negative controls.
My signals at 20 km are strong and clean.
A possible correspondent at 80 km, is fighting a strong local QRM.
My signal does not activate the RX of Twente.
My power is close to the maximum allowed.
Federico EA2HB
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