1168Re: [SpectrumLabUsers] Active antenna connection to soundcard input
- Jan 2 12:29 AM
----- Original Message -----
Subject: Re: [SpectrumLabUsers] Active antenna connection to soundcard input
> True, if you happen to be in the lucky position to have a soundcard with
> a true "Line" input.
> On most laptops, there is only a combined microphone / line input, and a
> small DC voltage is coupled to the center conductor to feed the
> amplifier inside an electret microphone. But even shorting such an input
> to ground will do no harm. Only connecting it to a higher DC voltage
> externally (say 12 or 24 V) may cause trouble.
I had not thought of that.
I do have a netbook and like many modern laptops it has an input that can be configured either as a mic input or stereo line input.
I have a few notes here https://sites.google.com/site/g4zfqradio/sdronasus
73 Alan G4ZFQ
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