[ntp:questions] Can the line audio out of HF radio be used to sync ntp. Trying to get a cheap ($) radio method.

David J Taylor david-taylor at blueyonder.not-this-part.nor-this.co.uk.invalid
Thu Apr 30 14:48:14 UTC 2009


Unruh wrote:
> Nathaniel Homier <ntp at universal-mechanism.org> writes:
>
>> Hello.
>
>> I would like to know if one can use the line audio out of any old
>> portable shortwave radio tuned to a time signal and fed via a line
>> audio input.  This would be motherboard audio.  The primary reason
>> is that I get the impression that ntp radio clocks are for sale at
>> very high prices.  The most I have to spend is about $200.  I
>> already have very nice Sony 7600G HF portable and that gets the time
>> freq. from 2.5 to 15 very well.  My computer is the new pci express
>> and I have no serial port.
>
> If you have $200, why not get a GPS 18LVC for about $70 and pay your
> local radio hobbyist to install an RS232 plug and a USB poser plug.
> That way you wil get microsecond rather than millisecond accuracy.

Where are you proposing he plug the RS232 lead in?  Buy a PCI/serial card?

David 




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