We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Author Topic: 12786 FAX  (Read 647 times)

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
12786 FAX
« on: August 05, 2018, 2347 UTC »
12786 FAX 2242Z 05AUG18
NMC Pt Reyes CA.

https://nofile.io/f/BVgcbedow2t/20180805_224210_fax.bmp

Offline fpeconsultant

  • Hero Member
  • *****
  • Posts: 938
  • I miss "Up Against the Wall Radio"...
    • View Profile
    • Email
Re: 12786 FAX
« Reply #1 on: August 06, 2018, 0016 UTC »
Very nice.
Near Chicago, IL USA.  Drake R8, Ten-Tec RX340, JRC NRD545, Watkins Johnson HF-1000, Wellbrook loop at 28', 40m inverted vee.  Please QSL to fpeconsultant@aol.com thanks.

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #2 on: August 06, 2018, 1749 UTC »
Thanks, was one of the cleaner sigs for faxing heard here.

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #3 on: August 08, 2018, 1902 UTC »

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #4 on: August 10, 2018, 2145 UTC »

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #5 on: August 14, 2018, 1625 UTC »

Offline fpeconsultant

  • Hero Member
  • *****
  • Posts: 938
  • I miss "Up Against the Wall Radio"...
    • View Profile
    • Email
Re: 12786 FAX
« Reply #6 on: August 14, 2018, 1954 UTC »
You're certainly on a roll.
Congrats
Near Chicago, IL USA.  Drake R8, Ten-Tec RX340, JRC NRD545, Watkins Johnson HF-1000, Wellbrook loop at 28', 40m inverted vee.  Please QSL to fpeconsultant@aol.com thanks.

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #7 on: August 15, 2018, 0426 UTC »
I'll do some more as I try to figure out wich decoder is best or most reliable and then get bored. One or more of the decoders here seems to have an issue where it syncs fine at start of fax and then somewhere along the way loses sync and starts faxing somewhere in the middle of the page. Trying to determine if this is a system timing issue external to the decoder, an artifact of how the decoder applies system time, or the signal itself is messed up. It could also be an artifact generated by the sdr or sdr app, or something that arises whenm the system becomes loaded with other cpu intensive tasks, when I log in here the pc is usually running at least one decoder and sdr app and opening webpages can briefly max out the cpus because of the security checks applied to each web page.

:D

Offline fpeconsultant

  • Hero Member
  • *****
  • Posts: 938
  • I miss "Up Against the Wall Radio"...
    • View Profile
    • Email
Re: 12786 FAX
« Reply #8 on: August 15, 2018, 1408 UTC »
The US based faxes were having difficulties not long ago - Chris was the first to post about it I think - right in the middle of a fax, it would shift slightly to one side and continue normally from there - the result being a fax with an offset somewhere along the line.  That could be happening again.

Here's the thread:
https://www.hfunderground.com/board/index.php/topic,34676.0.html
« Last Edit: August 15, 2018, 1543 UTC by fpeconsultant »
Near Chicago, IL USA.  Drake R8, Ten-Tec RX340, JRC NRD545, Watkins Johnson HF-1000, Wellbrook loop at 28', 40m inverted vee.  Please QSL to fpeconsultant@aol.com thanks.

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #9 on: August 15, 2018, 1814 UTC »
Yep exactly what's been seen here. Also they've been having dropouts in the tx, wich simply adds noise to the image but doesn't hinder sync. I should start taking note of wich are the offenders and send them an email, but I can't be the only one noting this as multiple fishing and other vessels use these and have to see what I see and I figure they'd contact USCG and tell them about the service quality long before anyone else does.

Offline fpeconsultant

  • Hero Member
  • *****
  • Posts: 938
  • I miss "Up Against the Wall Radio"...
    • View Profile
    • Email
Re: 12786 FAX
« Reply #10 on: August 15, 2018, 1832 UTC »
Yes I agree with that.  I'll try to grab some this weekend - CA, LA, MA are usually strong here and HI at times as well.  I use an (old) Universal M8000 so screen shots are out but I will report back.
FPE
Near Chicago, IL USA.  Drake R8, Ten-Tec RX340, JRC NRD545, Watkins Johnson HF-1000, Wellbrook loop at 28', 40m inverted vee.  Please QSL to fpeconsultant@aol.com thanks.

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #11 on: August 16, 2018, 0645 UTC »
The 8000 was the bomb back in the day, my friend with the wall of jrc gear has one that even does the government modes denied to us commoners as he's a "station engineer" and conned universal or whoever sold it to him with some gov letterhead saying he was clean unlike the rest of us. I had a 600 and it made lovely faxes, wish I still had it - I've a fetish for old embassy/spy gear, but yes hard to go back to something that can't copy/paste. The only thing more revolutionary to hf radio than software decoders are sdr rigs far as I'm concerned.

Offline ChrisSmolinski

  • Administrator
  • Marconi Class DXer
  • *****
  • Posts: 20215
    • View Profile
    • Black Cat Systems
Re: 12786 FAX
« Reply #12 on: August 16, 2018, 2114 UTC »
Are the USCG faxes messed up again?

Josh - have you considered using imgur? You can then display your received fax images directly in a posting here.

Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 270 ft west-south-west beverage / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #13 on: August 17, 2018, 1947 UTC »
I'll have to look at imgur and see. Here's sone great faxes from 12788 NMG New Orleans;
https://nofile.io/f/xeFEujBOGZa/perfect+fax.bmp

https://nofile.io/f/nx6snFDt7pr/broke+fax.bmp

And some decent ones from yesterday;
https://nofile.io/f/zXWorkOdBfa/bnzxcvmasdfj+qwer.bmp

https://nofile.io/f/nYhC6oYj3A9/dfjikl.bmp

I suspect the decoder has a issue perhaps as this is what results from checking autosave;
https://nofile.io/f/2HaDaZv3A1U/20180817_193843_fax.bmp

This one just came in perfectly, I was suspecting that by minimising and maximising the decoder app had somethiung to do with the issue so I reduced the decoder several times to task bar yet the image came out great;
https://nofile.io/f/yNhsamfvjbQ/nice+fax.bmp
 

Offline Josh

  • DX Legend
  • ******
  • Posts: 1726
    • View Profile
Re: 12786 FAX
« Reply #14 on: August 17, 2018, 2016 UTC »
This one turned out nice too;
https://nofile.io/f/qjYQm2Y0jd8/50+shades+of+greyscale.bmp

However it reveals a few issues. One is the slight timing issue as the image slants from top to bottom, usually this is not anywhere near as apparent as in this image. Another issue is the decoder didn't clear screen when it was given the start/sync signal so it applied the new image to the old. The slant could come from tx, rx, decoder, or sound card, while the reset signal going missing could be either the decoder's broke or it never got one. All this trouble for something I'll never really use other than for a few minutes diversion, isn't America great!?!