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Messages - RST111

Pages: [1] 2 3 ... 6
1
SDR - Software Defined Radio / Hack chat on sdr radios 9/18 PDT
« on: September 16, 2019, 1708 UTC »
https://hackaday.com/2019/09/16/software-defined-radio-hack-chat/

Chat about SDR radios.  Might be interesting

2
Equipment / Sat recv station build
« on: September 13, 2019, 1654 UTC »
I always like to see how people set up their listening posts for various aspects of the hobby.  This is a pretty nice sat recvr station.

https://community.libre.space/t/stegoboard-satnogs-ground-station/4640

3
HF Mystery Signals / (news story) UNID 28 MHz in Africa
« on: September 12, 2019, 0323 UTC »
http://forums.qrz.com/index.php?threads/mysterious-signals-from-west-africa-on-28-mhz.672819/

Quote
The latest IARU-R1 Monitoring System newsletter reports mysterious signals from West Africa on 28250.6 kHz AM with a rising carrier and dots every 76 seconds

The signal is thought to originate from the area of Gabon and has been observed in previous years but the purpose is unknown.

4
Equipment / Re: Test Equipment for First Time Build
« on: September 10, 2019, 0528 UTC »
Thanks for asking this Butch! I'm interested in the answers as well.  I've been wanting to mess around with the same stuff and am kind of lost as to where to start equipment wise.


5
SDR - Software Defined Radio / Re: Used SDR pricing (Elad FDM-S2)
« on: September 10, 2019, 0459 UTC »
Universal sold one in 2016 for $440.  Fred usually has the fairest market prices for buyers, IMO.  eBay tends to be overpriced.  Since you're a seller, you may want to use a different pricing scheme. ;-)

https://www.universal-radio.com/used/sold737.html

Looking at QRZ there's a few prices from 2018:

$300 (down from $350)
https://forums.qrz.com/index.php?threads/elad-fdm-s2.630413/

$350 (down from $395)
https://forums.qrz.com/index.php?threads/elad-fdm-s2-sdr-receiver.603880/

$295
https://forums.qrz.com/index.php?threads/elad-fdm-s2-sdr-receiver.600221/

Hope that helps!

6
Was gonna ask about the snr for each rig. If they're not the same, that will effect the outcome as far as comparing apples to apples.

Yeah, I'm trying to figure out the right baseline.  The gain options are very different for each, at least how SDR Console implements them.  And the response when one switches gain is different as well.  I'm going to try to do a video this weekend.  I'll show the different gain options and what they do, and those who have more experience can help figure it out.

7
I just got my Airspy Discovery this week; started playing around with it and comparing it to my Afedri.  I run 2 copies of SDR-Console, and the radios are on the same 40m dipole through a stidsberg multicoupler.  The one difference is the Afedri is using 50 ohm coax and the Discovery 75 ohm (RG-6 quad shield because that's what I had sitting here).

So far, they seem to pull in the same signals.  The main non-scientific subjective difference I've noticed is that the Discovery has a better SNR.  It's a lot quieter.  One thing to note is that I live in a fairly rural area with low noise and no strong signals that overload things.  So I'm the wrong person to ask if anyone is interested in how the radios compare in overloaded situations.

I'll do some more comparisons and post results; I'll post a youtube video with the consoles running side-by-side if I can figure out how to record my screen.

Bottom line - I'm definitely impressed with the Discovery and have no regrets getting it.  It's performing well and actually comes out a bit cheaper than the Afedri.

8
Shortwave Pirate / Re: UNID 6925 USB 0220 UTC 7 Sep 2019
« on: September 07, 2019, 0240 UTC »
02:39 S7 into WA state.  SINPO: 45233 - heavy static out here 40m amateur is noisy, too.

02:39 Shatner singing Bohemian Rhapsody (?!?)
02:40 Country-ish tune "a**hole for a wife"
02:44 Dennis Leary - I'm an Asshole

02:44 Band conditions worsened SINPO: 35132

02:44 Gypsies, Tramps, Thieves - Cher
02:46 Sloopy Hang On

02:52  Can't distinguish words now; SINPO: 25111

9
Shortwave Pirate / Re: Clever Name Radio 6900 USB 0014 6 September 2019
« on: September 06, 2019, 0021 UTC »
00:20 UTC I'm hearing it at S7 / SINPO: 45433 into WA state near Seattle on my new Airspy Discovery (thanks for helping me test it!) / 40m dipole

00:23 - Hocus Pocus by Focus (great tune, btw)
00:31 - 70's style music?  "Do what you wanna do"
00:32 - Station ID

00:41 - Slight decrease in SINPO due to static crashes starting to hit me  SINPO: 45333

10
Equipment / Re: Question about Antenna for PL-880
« on: September 05, 2019, 0800 UTC »
For my Eton/Grundig Executive I bought a bag of mono jacks off amazon for like $9 and wired one to a BNC connector.  I have BNC on all my inside HF rx runs because it's easier to deal with than PL-259.  If need to go to PL-259, I just use a BNC to PL-259 adapter.

https://www.amazon.com/gp/product/B07DKDWHRR

Note that these are really, really cheap quality.  They work, but the metal connectors are thin and flimsy.  I expect it will wear out sooner rather than later.   But I have a bagful of repair parts  8)

11
Equipment / Re: Coax Cable Management
« on: September 05, 2019, 0749 UTC »
Nice!  The notches are a great idea! I need to do this except with a vertical sliding window.

12
It was activated.  I started a new thread with the frequency and a signal report.

13
Amateur Radio / Hurricane Net for Dorian 7.268 LSB 04:07 UTC 2019-09-01
« on: September 01, 2019, 0410 UTC »
Hurricane Net was activated at 21:00 UTC on 2019-08-31.  I'm picking them up now in WA.  SINPO:  34333

"I" would have been a 5 but some lid was on 7.270 calling CQ for a contest.

https://hwn.org/

14
Shortwave Pirate / Unidentified Radio 6925 USB 0300 UTC 8 Aug 2019
« on: August 08, 2019, 0302 UTC »
0300 - Techno / dance music   S8 in Seattle area SINPO: 55444
0309 - 70's style psychedelic music - might be a Hendrix tune I'm not familiar with (I know, I should be ashamed)
0313 - Station ID
0313 - 50's style rock
0316 - You still want me - kinks
0317 - Station ID
0319 - Michael Jackson - Beat it
0320 - Station ID
0320 - Signal quality dropping a bit; some QSB and static crashes.  SINPO: 55333
0327 - Off the air

Thanks for the music!

0332 - Back on the air?
0332 - Aerosmith - Sweet Emotion
0334 - Off the air

0337 - Back on the air    SINPO: 45333
0337 - Techno kind of song
0338 - Beatles - I'm so Tired
0340 - Station ID
0340 - rock song
0345 - Station ID
music
0352 - Station ID
0352 - Music, has a dance beat

Going to have to tune out to do some other stuff, but signal still going strong @ 0353

15
Just came across this thread - this is great!  Thanks for posting it, Chris.  I'm learning a lot.

I'm trying to figure out what antenna to try next.  Right now I have an end fed long wire (~75ft @ 50ft high).  It works pretty good, but being on the west coast makes it tough to pick up US pirate and Europe.  Rural area, so I don't really have too much QRN as compared to urban areas.

Might go for a loop next. Got a tennis ball cannon over the summer and was able to launch a dipole into my trees at ~100ft.

Patchboard is a great idea; I didn't think of that.  Good switches are expensive, but this would work great.   I'll have to build one!



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