Re: [IRCA] [NRC-AM] Building a "state of the art" MW DX station
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Re: [IRCA] [NRC-AM] Building a "state of the art" MW DX station



Hi Les,
Re: SDR-IQ vs. Perseus: you can compare them online, I have both connected here in easternmost Finland always to same antenna, usually 400 m Bev beamed to East Asia. See: http://sdrspace.com and http://microtelecom.it/map/PerseusServers.html . You need to install the respective software: SDR-Radio and Perseus software. I have Wellbrook preamp usually on, so you may notice that SDR-IQ starts clipping a bit earlier and needs attenuation before Perseus, but otherwise there shouldn't be very big differences. Please let me know if you hear something on Perseus that can't be heard on SDR-IQ!

73, Mauno

3.1.2012 8:56, Nick Hall-Patch kirjoitti:
Hi Les,

There was a discussion concerning the SDR-IQ vs. the Perseus on the Perseus Yahoo group around the end of November; look in the group archives for details. The Perseus software seems to be rather static, while the SDR-Radio software for RFSpace radios keeps on being developed, and even the simpler RFSpace Spectravue software keeps improving in fits and starts (remember that software is important in a "software defined radio"). However, I don't think anyone would disagree that the Perseus hardware is more crunchproof than the SDR-IQ, in addition to the Perseus' greater bandwidth. More recent RFSpace radios are more comparable to the Perseus, but they are pricier. For some peculiar reason, they come complete with electrically noisy power supplies along with the higher price.

As for antennas, the broadband Wellbrook loops do seem to be quite resistant to local noise. I've used the ALA100 with quite a lot of success in electrically noisy hotel rooms, suspended in a window, and driving both conventially tuned radios and SDRs. Tacking the loop onto your fence (the loops receive well close to the ground) will likely give quite good results. Main problem is that loops do have a null. Can you do two loops at right angles to each other (maybe after verifying their lower noise level at your site before springing for the second one), and switching between them, or even phasing them together?

best wishes,

Nick


At 04:10 03-01-12, you wrote:
Honestly, the ability to review recordings is the biggest deterrent to my upgrading my RF Space SDR-IQ to a Perseus. While it would be wonderful to record the entire AM band on a given night, it would prove nearly impossible for me to review.

I'd be interested in how much difference in performance I could expect between the SDR-IQ and Perseus in regards to DXing the MW band.

73,

Les N1LF


Les Rayburn, Director
High Noon Film
130 1st Avenue West
Alabaster, AL 35007-8536
(205) 621-7500
(205) 621-7505 FAX
(205) 253-4867 CELL
http://www.highnoonfilm.com



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