LF: Re: CW-Keying via Soundcard or PC speaker

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LF: Re: CW-Keying via Soundcard or PC speaker

from [Alberto di Bene]

[Permanent Link][Original]

To:	[email protected]
Subject:	LF: Re: CW-Keying via Soundcard or PC speaker
From:	"Alberto di Bene" <[email protected]>
Date:	Thu, 08 Feb 2001 10:46:24 +0100
Organization:	Undisclosed
References:	<[email protected]>
Reply-to:	[email protected]
Sender:	<[email protected]>

[snip]
So, if possible, stay above 2kHz, then you don't even need a sine wave.
[snip]


Well, if you use a perfect square wave, this requirement can be relaxed a  bit,
as a perfect square wave has only odd harmonic components, so you just need to
stay above  1/3 of the audio passband of your TX.
The 2 kHz limit can probably be lowered to 1.3  - 1.5 kHz

73   Alberto   I2PHD

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