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Re: LF: Article on VLF

To: <[email protected]>
Subject: Re: LF: Article on VLF
From: "Graham" <[email protected]>
Date: Mon, 2 Dec 2013 22:18:23 -0000
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You could even tailor it to letter frequencies, e.g. one short pulse for E, one long pulse for T, ...

Ah , some  sort of  drifting  oscillator  ? the  longer the  'on time' the  more  in moves 
 
would  sound   something  like a Bird  'Chirping'         could  call it  'Chirp'  !

--------------------------------------------------
From: "Chris Trayner" <[email protected]>
Sent: Monday, December 02, 2013 10:09 PM
To: <[email protected]>
Cc: "Robin Gape" <[email protected]>
Subject: Re: LF: Article on VLF

>
> On 2013 Dec 2, at 18:31, John Rabson wrote:
>
>> I have received the following request from G4AEE of the Cave Radio & Electronics Group Journal editorial team:
>>
>> “[We wish] to include an article on what radio amateurs are doing at VLF ...
>> Another aspect would be the likely performance of highly compressed speech.
>
>
> Hey, I've got this great idea.
> Rather than compress speech, why not render the message simpler? Rather than the sounds you could just send the text, encoding the letters in some way. You could turn the carrier on and off, say in short or long bursts, with a group of such pulses to represent each letter.
>
> You could even tailor it to letter frequencies, e.g. one short pulse for E, one long pulse for T, ...
>
> 73,
> Chris
> -----------------------
> Dr Chris Trayner
> School of Electronic & Electrical Engineering,
> The University of Leeds,
> Leeds LS2 9JT, United Kingdom
> Tel: +44 113 34 32053
> Fax: +44 113 34 32032
>
>
>
>
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