[Lowfer] SDR-IQ and spurs

[Gary]

Craig, etc al,

I am dealing the crud from wall warts, routers, etc as well. I have been able to identify and mitigate a few of them but ran out of ferrites. I seem to have a particularly nasty one around 516khz that throws 58-60hz spurs a few kHz either side of center - and drifts of course. This one almost disappears when I disconnect the antenna.  The SDR-IQ, more noise chasing, and antenna improvements will keep me busy this summer. :-)

Gary/w0gx


craig wasson <craig at wasson.com> wrote:

>I have used my SDR-IQ extensively on LF and never noticed any spurs I could
>attribute to it.  I have tons of spurs and garbage coming from the variety
>of computers, routers, lights, power supplies, etc in the house though.
>Luckily when doing very narrow QRSS receiving those interfering sources move
>around enough to pretty much disappear.   One of my favorite activities is
>to monitor LF broadcast carriers and the receiver is absolutely rock solid
>down to a small fraction of 1 Hz for weeks at a time.
>
>I have noticed a lot of spurs and odd carriers above 10 MHz though.  Maybe
>one every 1 or 2 hundred KHz.  Not bad enough to cause problems but
>noticible - especially during the low sunspot activity during the last few
>years.   I have never observed any images or intermod with it.
>
>I highly recommend the SDR-IQ - I would not part with mine.
>Craig - N6IO
>
>
>On Wed, Mar 30, 2011 at 9:35 PM, Gary <garylyons at cox.net> wrote:
>
>> Garry and Dick,
>>
>> Thanks for the feedback on the SDR-IQ - and the reassurances.  I suspect I
>> will have one on the desk in the not too distant future.
>>
>> Gary/w0gx
>> Edmond OK/EM15fp
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