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there are currently two tuners in these units. the R820T and R820T2; they're both completely compatible with each other, but the T2 is noted for having a bit more sensitivity. The $10 chinese dongles are ok; but it's questionable iff they have any antenna protection. But, yeah; for what it can do the price is outstanding. I remember just about 5 or 6 years ago looking at some of the SDR solutions and they were all thousands of bucks. When this came out it literally changed the game; and despite the limitations, it's become very popular for projects simply due to the price. Quote:
There's a Live-CD for them? Doesn't surprise me; but people have said gqrx isn't that great of a program and a lot of people wish SDR# was built for Linux. Here's what's interesting about the WRDU DXing. I looked up on Radio-Locator as to what was close-by on 100.7. There were no stations within 60 miles. There was a station down south of Roanoke, about 66 miles away putting out 820 watts. That's down in the mountains though; so I suspect that while they had a height advantage; mountains were blocking it. The only other closest station was 73 miles north in the mountains. It was clearly WRDU 100.7; I was getting RDS data that confirmed this, there's also this: http://dewdude.ath.cx/WRDU.mp3 - and that was literally just a 300-ohm folded-dipole made for twin-lead (which was half-wavelength for 88mhz, so it's a japanese FM band antenna) that was simply attached to the railing (push pins through the holes in the insulators) and running back to my SDR through extra twin-lead and running through the 9:1 balun...I didn't have an F-to-SMA to use a 300-75 balun...not to mention the SDR stuff is 50ohm input. I had zero complaints about that performance. The question that's burning me is whether there was something going on letting that station come in; or if it was just a LOS thing. The tower down in NC for that station is in a pretty flat area and has a HAAT of like, close to 2000'. From what I could tell on Google Earth; I was about 800ft elevation with a clear LOS down to Raleigh. So...maybe that station in that particular area isn't really a record but just a fluke of line-of-sight. I was down at my grandparents last month with the setup; they live just outside of Fredericksburg VA. Their kitchen basically sits at the second floor on the back of the house; so I was sitting there with my 1m magnetic whip on the top of the chest freezer. When I was doing a reception log; I actually had to tell radio-locator to start showing me stations past "fringe" because that's what was coming in...I'd stop on a signal...figure out what content it is...look at the list..and nothing. I eventually got the point where I just have it show me FM stations within 200 miles. I'm not questioning whether I picked up WRDU or something else; I was able to identify it both from a sound clip and RDS data; but it's just got me wondering if it was a crisp winter night that did it; or just the fluke of being on the side of the mountain facing the transmitter with little in between us but air. As far as stations competing; I don't believe this thing responds to FM-capture like normal radios. I would get ghosts of strong FM stations; sometimes 4 or 5 on the same frequency. There was a time or two I heard two FM's competing...and it wasn't capturing either one. SDR seems to break some rules like that.
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Audio: SMSL M8 -> Little Bear P5 -> Sansui SE8 -> Yaqin MS-12B -> Denon PMA-770 -> Ohm Model L | Ham: NQ4T - IC-7300 [/SIZE][/COLOR] Last edited by dewdude; 02-24-2015 at 12:00 PM. |
#2
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something sufficiently narrowband. The IF bandwidth on the chips is set insufficiently narrow in much software! HackRF on SDR# is particularly egregiously hideously stupidly bad. |
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