[Lowfer] Software Defined Radios

[Zack Widup]

I have yet to try to use a sound card as a VLF receiver. What kind of
antenna(s) do you use? Do you use a preamp between the antenna and
sound card? How high in frequency will it go?

73, Zack W9SZ

On 1/17/12, Douglas D. Williams <kb4oer at gmail.com> wrote:
> Sorry, failed attempt at humor. Seemed funny last night. Today....not so
> much. That's what three glasses of wine will do. ;-)
>
> Thanks for your suggestions. I understand the thunderbolt GPS units are
> quite expensive. I also have successfully used Spectrum Lab to lock onto
> NAA on 24 kHz for frequency stability, but this was using a computer sound
> card for a VLF receiver. I forgot that Spectrum Lab can directly control
> the SDR-IQ, so I guess you could do the same. Spectrum Lab is an amazing
> piece of software, but I'm too dumb to know how to use 1/10th of what it
> can do.
>
> D. KB4OER
>
> On Mon, Jan 16, 2012 at 4:27 PM, Douglas D. Williams
> <kb4oer at gmail.com>wrote:
>
>> Please run these solutions by Mal, G3KEV on RSGB LF reflector and let me
>> know what he says.
>>
>> ;-)
>>
>>
>> Doug KB4OER
>>
>>
>>
>>
>>
>>
>>
>> On Mon, Jan 16, 2012 at 3:16 PM, carmen <_ at whats-your.name> wrote:
>>
>>> SDR-IQ clock drift is quite visible on 524288-bin FFT in SpectrumLab
>>> (just zoom into WWV's carrier and leave it open). it also appears quite
>>> visible on NetSDR
>>>
>>>
>>> http://www.hfunderpants.com/?p=328
>>> http://www.hfunderpants.com/?p=350
>>>
>>>
>>> between Rubidium clocks or Thunderbolt GPS 10mhz sources, there are
>>> solutions..
>>>
>>>
>>
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