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Re: LF: Re: RFspace SDR-IQ

To: <[email protected]>
Subject: Re: LF: Re: RFspace SDR-IQ
From: "Graham" <[email protected]>
Date: Sat, 30 Oct 2010 10:31:34 +0100
Importance: Normal
In-reply-to: <9D5C745165354DCE8D0B48E7D4D2ECFE@MLB>
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This  SDR is round $200  , has  anyone used one ?

G..

http://www.lazydogengineering.com/LD-1A_SDR.html
--------------------------------------------------
From: "Martin Evans." <[email protected]>
Sent: Saturday, October 30, 2010 8:43 AM
To: <[email protected]>
Subject: LF: Re: RFspace SDR-IQ



Hello group.

Has anyone any experience with this SDR ?
It looks interesting and I'm a bit tempted, especially as it works full spec down to 500 Hz and "usable" to 100 Hz. But as I have never used an SDR, I haven't got a clue if it's any good or not.

Tony.

#########################################

Tony - I received SAQ two ways a few days ago -

1) wire antenna straight into sound card, using Winrad;

2) Same wire antenna through SDR-IQ using SDR-Radio.

Antenna is 100m inverted U tuned with around 100mH (can't really remember exactly).

I swapped the antenna physically between the two setups every few seconds.

I was using two separate computers, one for each method.

Result? - really very little difference. A good clear signal on both. The sound card/Winrad setup might have been marginally cleaner, but bearing in mind that this was a lashup, with no attempt at any kind of optimisation or minimalisation of computer noise, I would say that the SDR-IQ was close to being the equal of the "wire into soundcard" method. With some careful filtering to clean up the computer noise, it would almost certainly equal or exceed it.

I found incidentally, that SDR-Radio software has a much more sensitive waterfall display than the Spectravue supplied with the SDR-IQ. The former gave a strong clear trace, while the latter's trace was barely discernable.

Get one - SDRs are the best thing since CW!

Hope this helps,

Martin  GW3UCJ Swansea.








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