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Messages - EliteData

Pages: [1] 2 3 ... 14
1
Other / Re: UNID 7188 LSB 2120 UTC 10/23/2016
« on: October 23, 2016, 2227 UTC »
Hams Behaving Badly.

i have a feeling amateur radio will take a similar fate the CB radio did, all in due time.

2
European Pirate / TRX Radio - 6300 (was 6935) AM - 2115z - 10/22/2016
« on: October 22, 2016, 2118 UTC »
2117 - oldies music - great AM audio - S5-S7 with fades
2132z - signal much stronger peaking to S9 now but with fading, appears to be 4Khz audio but excellent low audio frequency response.
2138z - OM - "you could be enjoying..." then cut out mid sentence, 3 seconds of silence then into another oldies song (lol)
2152z - OM synthesized voice "TRX radio radio TRX shortwave" ?
60 second sound clip recorded at 2150z, SAM @ 4Khz - http://www.scpdny.com/22-Oct-2016-175010%206.935060%20MHz.wav

3
SDR - Software Defined Radio / Re: Thinking of getting a SDR
« on: October 22, 2016, 2056 UTC »
For general listening the SDR Play is hard to beat for the price. And, HRO has it on sale for $124 and change for next few days.
i'll second that.
the SDR play is a great SDR receiver however, the front end on it is easily overloaded by strong signals within its passband that are nearby.
its not a deal breaker since you can adjust the gain to resolve that issue.
additionally, the SDR play is terrific at VHF and UHF bands but again, the front end can be easily overloaded.

4
European Pirate / Coast FM - 6205Khz AM - 10/22/2016 - 2046z
« on: October 22, 2016, 2048 UTC »
good signal and audio across the pond to the "right coast" of the US.
averaging S5, peaking to S7, fades in between.
appears to be about +100Hz from 6205Khz, receiving with 5Khz bandwidth.
2100z - local news (never heard a pirate with local news before)
2102z - station ID "coast FM... 102.5 & 102.7" then into Eurythmics - sweet dreams" - sounded like "102.5" but could have been "sixty-two-oh-five"

5
Shortwave Broadcast / Re: WJHR 15555 khz USB 1820z 10/18_18/ 16
« on: October 19, 2016, 2008 UTC »
i have heard this broadcast before (and at lower frequencies) and wondered if they are even legitimate.
are these clandestine in nature ?

6
I'm having trouble in finding an ideal SWR meter
that really depends on how much you are willing to spend on one.

7
Shortwave Broadcast / Re: 5812 khz ?? 14:00z Oct 7
« on: October 07, 2016, 2041 UTC »
ahh, wish you recorded the I/Q baseband.
its hard to say what it was that you may have heard.
i have heard some "interesting" harmonics in the past from legit stations and amateur radio ops.

8
Shortwave Broadcast / Re: 5812 khz ?? 14:00z Oct 7
« on: October 07, 2016, 2029 UTC »
Was super strong and listened to it for 10 or 15 minutes and right at the top of the hour it cut out. At first I thought I was listening to a regular SW broadcast and wanted to switch to the station's other frequency. Then I was unable to get a match anywhere

Example of a 1999 spy numbers logging by our own Chris Smolinski

78 1999-05-29     0000 0000  5812.0   USB   E5     Smolinski            MD,USA                    ID 884, Count 81, // 4670 
hmmm, maybe it was a user error on a numbers station.
was it in AM or SSB ?

9
Shortwave Broadcast / Re: 5812 khz ?? 14:00z Oct 7
« on: October 07, 2016, 2016 UTC »
that almost sounds like a spurious harmonic maybe generated from another station ? (didnt actually hear it)

10
Utility / Re: 2860kHz, unknown service
« on: October 07, 2016, 2003 UTC »
here in the USA, 2860Khz USB is allocated to aeronautical commercial aircraft on the north atlantic side if the USA, known as "NAT-I, Shanwick Radio".
here is a similar logging on the same frequency, same mode on 5/14/2016 logged as "CIS military".
https://www.youtube.com/watch?v=I7-hfC-3y38

11
When I first heard of the fixed frequency radios I thought to myself: 'what happens when the station goes off the air, or changes frequency?'

The radios look like a small transistor with solar panel on the back, and they have a USB, presumably used for programming frequencies, and the radios have nine programmable stations. Looks like a small radio with no dial, just a couple buttons on the front. Probably has a SiLabs chip inside.

It looks like some religious stations in third world countries give them out to their listeners for free so people can listen to their station in areas with marginal or non-existent electric power.

what a clever way to corner the "market".
"listen to us or listen to nothing"

12
General Radio Discussion / Re: Pirate TV Broadcasts in Pirate Band
« on: October 07, 2016, 1719 UTC »
Why not a slide show in Slow Scan?   


not sure how well that would work out given the few minutes it takes for each picture to scan completely.
you could probably cut that time in half by reducing the vertical and horizontal size of the picture to half its size being scanned (the output size).
either way, it will still take significant time to send a slide show.

13
Equipment / Re: FM transmitter
« on: October 07, 2016, 1456 UTC »
The first rig I built from plans on the internet.  It was a Veronica VFO thing, and it did drift alot.  This was about 15 years ago, total outlay for the parts was $40, made the board for it in Mom's sink (she wasn't real happy about that...)  I later moved up to a Harris MS-15 which served me well for many years.

Its too bad they want an arm/leg for old broadcast junk on ebay.  I'd rather see that stuff go to good use than in the landfill.

+-RH
and the first one i built, was from a PLL synthesized FM broadcast radio receiver, i used a 12 volt car radio, they're easier to work on.
changing the PLL clock crystal to -100Khz to change even to odd.
tapping off the IF local oscillator mixer as the RF generator.
adding a RF LPF filter and adding modulation.
part 15 with no amplifiers added.
takes all but 30 minutes to modify and build.
built mine into a metal lunch box with a DC power jack, antenna jack and audio jack on the outside and a small stage amp inside that brought the RF power to 1 watt.
i eventually sold it to another pirate enthusiast for $100 who promptly ended the life of the device with magic smoke shortly afterwards   ;D

14
Equipment / Re: FM transmitter
« on: October 07, 2016, 1443 UTC »
...And how popular is FM piracy in NYC?
popular enough that for every commercial NYC FM station, there are 5 pirate NYC FM stations.
there are so many NYC FM pirates that there is competition between them, many of them transmit on top of each other in an effort to "block out" the other pirate, there are sometimes physical altercations between them over the little space available on the FM dial and who has the cheaper offer for advertisements and commercials.
however, it is extremely rare to find an FM pirate in NYC that is operating their equipment inside specifications that does not cause 1/2 power or more of the 2nd harmonics generated, deviation that exceeds 150Khz and generally sounding terrible overall with massive azimuth errors and background noise.
add to this that more than most of them are broadcasts that are directed at the large ethnic population (mostly in Brooklyn).
out of this huge mess of garbage, its very very unlikely that there is a "hobby" NYC FM pirate.
its not longer what it used to be years ago.


15
General Radio Discussion / Re: Pirate TV Broadcasts in Pirate Band
« on: October 04, 2016, 1432 UTC »
there is actually.
the same method used to connect to the internet through telephone land lines (dial up modem) from the 1990's.
you can send compressed video with sound, 320x240 @ 15 FPS using H.264.
there are problems though.
it will not work with signal propagation (fading).
you need a full duplex transceiver for TCP packets (simplex for UDP packets)
the signal must be strong and clear of interference.
its too costly and inefficient.

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