Messages

406

European Pirates and Private Stations / Re: Rado Waves International is on 15050 today

« on: June 10, 2014, 0311 UTC »

Maybe I heard something different then. I was using the LSB and USB modes and listening for a tone. Maybe it was my neighbor's dog clippers.

407

General Radio Discussion / Re: SDR direction finding

« on: June 10, 2014, 0304 UTC »

It sounds like its in its infancy. Mostly its my paranoid side that is curious.
 
I was thinking about 3 receivers placed across America for triangulation. And if you use something like Afedri SDR-Net x2 receivers, their 2 channels use the same clock so you could accurately steer the null. 

Then my paranoid side wonders about a govt. agency making their own system and automating the triangulation through some fancy software and *viola* they have a database of transmissions and their rough transmitter locals!

408

SDR - Software Defined Radio / Afedri dual channel receivers

« on: June 09, 2014, 0459 UTC »

Afedri's site has 2 SDR receivers to choose from with dual channels that I am stoked about. I want one so I can use antenna diversity and therefore reduce fading of my received signals!  Or I could use it as 2 separate receivers in one and view different spectrum from each.

AFEDRI SDR-Net x2 Dual Channel
http://afedri-sdr.com/index.php/afedri-sdr-net-x2-dual-channel

AFE822x SDR-Net ( Dual Channel )
http://afedri-sdr.com/index.php/new-afe822x-sdr-net-dual-channel

I'm going to study these up. I don't know the difference between the 2 besides the physical stuff.  I need to get some sleep so I have more mental bandwidth to study with.

409

Huh? / Re: A colaboration of software giants

« on: June 09, 2014, 0420 UTC »

But what about the spyPad? It's built-in camera is just looking right at you! And up your nostrils nonetheless. 

410

General Radio Discussion / SDR direction finding

« on: June 09, 2014, 0418 UTC »

Say I have an hour's worth of SDR recording from an SDR receiver with dual channel input (2 receiving antennas). 
Can I find the direction of all the transmissions that are within the spectrum of that hour that I recorded? 

411

European Pirates and Private Stations / Re: Rado Waves International is on 15050 today

« on: June 08, 2014, 1649 UTC »

1649utc
I have a carrier (a tone on usb and lsb) and its on 15052 or 15053
Thanks for the news.

412

The RF Workbench / Re: High Powered Pirates

« on: June 08, 2014, 1638 UTC »

I have a coworker that worked at a military radar station in Alaska. There was a fire alarm sounding inside and the door into the station was frozen shut. He went up to the roof and climbed in that way to find no fire.  While on the roof he felt the radiation and said it was tingly. I think he said it was in the megawatts range.  He is very quick and smart, weird, twitches, can't have children, and recently had his bladder removed. He thinks he's impotent from the radiation exposure. His thyroid had some problem after the exposure. 

413

The RF Workbench / Re: which type of crystal

« on: June 08, 2014, 1628 UTC »

UPDATE:
I got a ham license (hooray!) and tried the transmitter on air and it doesn't go across the street! It doesn't move the dial on my antenna tuner either. I used 2 different antennas. Full update is on the bottom of the article:
http://hfunderground.com/blog/?p=369

414

European Pirates and Private Stations / Re: Relays on S/W & M/W This Weekend

« on: June 08, 2014, 1545 UTC »

0801utc (1am local time)
I was listening for Atlantic 2000 and didn't have anything on 9485 or 6005.

415

Shortwave Broadcast / Re: Mali Bamako 5995 AM 05/04/14 2353-0001*

« on: June 08, 2014, 1543 UTC »

0805 utc (1am local time)
9635 I had a carrier signal. And according to short-wave.info, Mali Bamako was the only station on at the time.

416

North American Shortwave Pirate / Re: Old Time Radio 6771 AM 0000 UTC 8 Jun 2014

« on: June 08, 2014, 0320 UTC »

I hear a carrier. The noise gets louder when I tune to the frequency.  And on USB I heard some definite station sounds.

417

North American Shortwave Pirate / Re: Wolverine Radio 6935 USB 0139z 6/8/14

« on: June 08, 2014, 0233 UTC »

0222 utc
Wolverine ID

Noise is high but undetectable fading.  Sun is highish at 724pm local time.  
SINPO
25242 with sky loop and tuner

0231 utc
SINPO
15353 with helical vertical indoors and tuner (I tuned it so the noise went away)


Thanks Wolverine!

0300ish
SSTV with loop and tuner because the propagation improved and this was the best reception
It look like colors was the theme. Red red wine.

418

Shortwave Broadcast / Re: Mali Bamako 5995 AM 05/04/14 2353-0001*

« on: June 07, 2014, 1817 UTC »

Sounds like a cool station I'll start listening for it.

419

Equipment / Re: HF Receiving Antenna Myths

« on: June 07, 2014, 1709 UTC »

2 weeks ago I was messing around with my new adjustable inverted V. I have 5' of bare wire on each end so I can roll them up to shorten or unroll to lengthen the dipole.  I checked the resonance with a noise bridge.  At the longest dipole length, it was resonant to 6.4xx mHz.  At the shortest length it was resonant to 7.470ish and there was an American radio station nearby just barely legible. (so I figure this is as good as the antenna should get theoretically) It was 4pm in the afternoon and sun was high.  I went and checked my horizontal loop (about 97' in diameter) and the reception was the same.   Later at night on the loop the reception came in way better as the sun went down. But I couldn't compare to the inverted V because I took it down. I used my portable receiver on both antennas. It was a case of propagation. 

Nella F. is a forum member and believer in propagation as the main factor in receiving a signal.

This morning I put a tuner on my loop.  My loop connects to a 75ohm coax cable with no balun and comes inside the house.  I found a carrier signal on 6930usb (a slight tone above the noise) and I was able to tune to get better signal and reception than when bypassing the tuner (by about 10-20 percent). So I'm stoked for tonight, hopefully there will be some pirates to listen to and tune up.   

420

Equipment / Re: Inverted V on steep hillside

« on: June 07, 2014, 1609 UTC »

Chris, I had a 1/4 wave vertical with 4 radials 6 feet off the ground about 150' from the nearest house. It didn't pick up the noise from my house that I usually hear with my loop right next to my house. It was cut for 43meters and had no tuner. I connected my portable to its contacts with alligator clips. This is when there were some storms in the South (as I recall) in mid Feb. 2014. 
When I was only hooked up to the radials, I would hear the noise from the storms.  When I was only hooked up to the vertical wire, I didn't hear them so much.  When I was hooked up to both the wires sometimes I couldn't tell a difference. But sometimes both made the reception better.  This is storm noise I'm talking about receiving and I don't know if its polarized or not, its just my observations.

Without a tuner it was about as good as my loop that doesn't have a tuner.  I didn't compare it with the loop that much as the wires broke.