Low resource SDR Software

AM Radio discussion. Directional arrays are FUN!
Kent T
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Joined: Mon Dec 17, 2012 7:29 pm

Re: Low resource SDR Software

Post by Kent T » Sun Oct 01, 2017 8:18 pm

Suggestion! Look for an inexpensive business class laptop, Core i5 based Lenovo ThinkPad T 410 boxes in nice shape can be had for under $100. Usually you'll have USB2 and 8GB RAM Limit. I use these machines as daily drivers, and happy with them. Good battery life, especially with the extended battery, cheap parts and accessories.

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kkiddkkidd
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Joined: Mon Dec 03, 2007 11:13 am
Location: Lawrenceburg, TN

Re: Low resource SDR Software

Post by kkiddkkidd » Mon Oct 02, 2017 7:45 am

I will look into that. I have several Dell Mini's that I bought new as a lot and was wanting to use a couple of them to record the Eclipse AM band but they didn't have enough horsepower. I ended up using my good Panasonic Toughbook at the center of totality and the Dell Mini to log the few ham radio contacts that I made.

I used my quad core I7 office machine here at the shop. It didn't even know that there was anything connected even while recording 2+ mhz bandwidth around the AM band.

Thanks,
--
Kevin C. Kidd CSRE/AMD
WD4RAT
AM Ground Systems Company
http://www.amgroundsystems.com
KK Broadcast Engineering
http://www.kkbc.com

w9wi
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Re: Low resource SDR Software

Post by w9wi » Mon Oct 02, 2017 11:27 am

Did you hear anything interesting?

It took me awhile to review all the recordings... Identified about 130 stations. Nine metropolitan Chicago stations as small as 500 watts. (WRMN 1410 Elgin) Furthest west was 500-watt KICS 1550 Hastings, Nebraska about 650 miles. Furthest east was 1650 Portsmouth, Virginia.

Signals started from the west about ten minutes before local totality. The western signals disappeared pretty quickly and were replaced with things to the north and south. These stuck around a bit longer, then were replaced by signals from the east. Eastern signals stuck around at least 45 minutes past local totality.

As one might expect, distant signals were stronger & stuck around longer at higher frequencies. Nothing from any extreme distances. (KICS and KNSS, 1330 Wichita, were outliers) The distant signals were pretty intense though. Something was heard under every local station except WSM. (and including 50kw non-directionals on 1160, 1200, 1300, and 1510)

1360 WNAH ran a "DX Test" for the hour straddling totality. Frequent ID announcements, invitations to write for a QSL (I know of at least one DXer who has already received one). Numerous *Morse Code* IDs. (you would be amazed how well Morse cuts through a crowded AM frequency:) )
--
Doug Smith W9WI
Pleasant View, TN EM66

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kkiddkkidd
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Location: Lawrenceburg, TN

Re: Low resource SDR Software

Post by kkiddkkidd » Mon Oct 02, 2017 3:14 pm

I am still working thru the recording but my reception was much as you noted. Western stations quickly up and back down and then several upper band stations in Chicago, Birmingham, Northern KY. Then the eastern stations from NC, SC and GA were booming in for an extended period. Lots of frequencies with strong but unintelligible competing signals in the top end of the band.
--
Kevin C. Kidd CSRE/AMD
WD4RAT
AM Ground Systems Company
http://www.amgroundsystems.com
KK Broadcast Engineering
http://www.kkbc.com

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