[Lowfer] Software Defined Radios

[Laurence KL7UK]

Hi - I find the SDR fine down to dot 120 qrss at LF (500 and 137kHz) but obviously wanders with temp the higher you go...all to spec of course. I know people have interfaced outboard 66MHz locked sources, but not an implicit option on the unit (probably is but Ive not found it)
 
Nice box - had mine a few years and works well, though I did use a prefilter for LF/MF in very high MW locations (central Beijing/Shanghai) and up in Alaska where I have 50Kw blowotrches on 650 700 750khz up the road - 
 
Use mine with SDR radio/Spectravue but prefer the simplicity of Speclabs when Im feeling brainless as the IQ feed takes a lot of guess work out of the interconnects at audio. I also use VAC4 for chaining audio sources but I probably need a refresher course in Florida or Hawaii,.
 
Laurence KL7UK KL1X
remotely controlled
 

 

> Date: Mon, 16 Jan 2012 20:16:00 +0000
> From: _ at whats-your.name
> To: lowfer at mailman.qth.net
> Subject: Re: [Lowfer] Software Defined Radios
> 
> 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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