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LF: Re: Best tone for aural copy

To: [email protected]
Subject: LF: Re: Best tone for aural copy
From: "James Moritz" <[email protected]>
Date: Mon, 22 May 2000 16:48:32 +0000
In-reply-to: <[email protected]>
Organization: University of Hertfordshire
References: <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>
Dear LF Group,
I am intrigued by the discussion about different tones, listening conditions, etc. Personally, I favour about 1kHz, but this might just be because that's the frequency which comes out of most of the receivers I have used. On the G3WSC Puckeridge expedition, I found it quite difficult to get used to other people's receivers, with a lower audio pitch.
I agree that reducing the bandwidth does not help much when trying
to copy a signal in the noise. Subjectively, as the bandwidth is
reduced, the noise sounds more like the CW tone you are trying to
copy, so although there may be less noise, it is harder to
differentiate between it and the signal. It's a different story with
QRM, when a narrow filter is very useful.
I have also experienced the phenomenon of being able to copy
weak signals well when in a different room to the receiver, or from
the sound from headphones sitting on the table. I'm not sure about
different CW speeds, however - at least for me, I can receive slow
sending better, but then I struggle with fast sending even with no
QRN!
I'm now waiting for the RadCom article reviewing crockery to see
which bowl gives the best signal-to-noise......
Cheers, Jim Moritz
73 de M0BMU

Cheers, Jim Moritz
73 de M0BMU



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