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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Re: CW-Keying via Soundcard or PC speaker |
| From: | [email protected] |
| Date: | Wed, 7 Feb 2001 23:02:14 EST |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
The problem with using a soundcard output to a mic input is not in the
programming aspect, but is a question of efficiency and possibly power
dissipation. Guys who key Class C, D, and E amplifiers have enough trouble
with the duty cycle of QRSS sometimes. Imagine what a linear amp for SSB
might do at full carrier continuously for a minute. It's really, really much
easier to optoisolate an I/O port and use old fashioned on-off keying in most
cases.
73, John |
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