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G8JNJ

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G8JNJ
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  • Hi All, It works well on the MF Navtex frequencies, but not on the HF frequencies where the message format seems to be different ? I also don't know much about Navtex, I'm currently decoding South America and China, but I don't see any ZCZC strings,…
  • Hi John, "The current label system was never designed to handle thousands of entries." Agreed it's partially down to the way in which I use the KiWi. I like to spot 'odd 'transmissions - those that are unusual or unidentified. I typically spend abou…
  • Hi John, It's associated with the 'density' of DX tags in the chosen zoom level. I now have a lot of tags  >5,000. I edited the dx.json file and stripped out all the tags between 500KHz and 29MHz leaving me with a file size of 290 lines = 19KB I …
  • Hi john, I'm using Win 7 Pro 64 bit. "look at the "stats" tab are you getting audio underruns while paging? " The audio stats 'freeze' whilst the audio is stuttering. "look at the log tab on the admin page for underrun messages" No underrun message…
  • Hi John, A quick check at WF6 level with three successive page up / right arrow button presses to tune HF, results in ~3 seconds worth of 'stuttering' Regards, Martin - G8JNJ
  • Hi John, OK I'll try and grab some stats. It's currently like this procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st 1  0      0 369292   …
  • Hi, We used some Ubiquiti kit at another WEB SDR site some time ago and had similar problems. From memory the Ubiquiti is powered over the Ethernet cable via a PoE adaptor. It does use internal DC-DC switching convertors, but they were fairly well s…
  • "Unfortunately the Kiwi is in Maui and I am in California" Ah OK............ Good luck with your faultfinding, Martin - G8JNJ
  • Another signal from XSQ China decoded today on 8425.50KHz Regards, Martin - G8JNJ
  • Hi, This may sound a bit obvious - but have you checked that the antenna still getting power (DC supply volts) from the KiWi GPS SMA connector ? Sometimes when RF adaptors are being used the DC continuity can fail. Regards, Martin - G8JNJ
  • Hi John, Since I originally suggested adding different baud rates I have discovered that NAVTEX uses SITOR-B and a CCIR476 a character set. I had not realised this and had assumed it was just the standard baudot format typically used for most RTTY t…
  • Hi, Three other signals I've decoded (so far)   6322.5 CW FSK 170Hz shift 100bd, Murmansk, Russia12603.5 CW FSK SVO, 170Hz shift 100bd, Athens, Greece12622.5 CW FSK XSQ, 170Hz shift 100bd, China Regards, Martin - G8JNJ
  • "I've had a report of the iPad browser freezing with v1.154 when the screen is rotated. Does anyone else see this?" Works OK for me on my fairly temperamental old iPad Mini. Regards, Martin - G8JNJ
  • Hey, I just discovered that the new Navtex decoder works with other (very common) 170Hz 100bd FSK signals too :-) :-) I wonder how difficult it would be to add some adjustments for other shifts and Baud rates ? Regards, Martin - G8JNJ
  • Hi John, Wow really good and the Navtex decoder works well too :-) Another bonus is that I've found that the LMS denoiser works on Fax transmissions. I realise that this is a new feature and is still under development, but as the LMS sliders are cur…
  • Hi Lothar, Happy New Year. As Jim has suggested the SWARL is a good option if you don't wan't to create your own ID. Note copied from the KiWi Quick Start Guide. http://kiwisdr.com/quickstart/index.html#id-sdr_hu "Currently the form requires a ham …
  • Update. The clock frequency is ~ 66.6667MHz 66.6667MHz - 16.6032MHz = 50.0635MHz = Beacon frequency :-) Regards, Martin - G8JNJ
  • Hi, It could be a Nyqust sampling alias. From memory the ADC clock frequency is somewhere around 66.7MHz. So 66.7MHz - 16.6MHz = 50.01MHz which puts it in the same ball park. A couple of questions  What is the level of the actual beacon signal at th…
  • Hi All, Serdolik sounds like a possibility. Here's a longer recording including a section that does sound like an idling sequence or maybe RYRYRYRYRY :-)  This may be the section that I took the screen grab from. Audio Sample 2 Regards, Martin - G8…
  • Hi Jim, "I would say it is an "older waveform" as much of the newer stuff sounds more like "noise" I agree - that's why it stood out to me among all the others - it's 'odd' for a utility station. Regards, Martin - G8JNJ
  • Hi Ron, It's probably Super Darn. I normally see it around 12MHz but your screen grabs look very similar. https://en.wikipedia.org/wiki/Super_Dual_Auroral_Radar_Network Regards, Martin - G8JNJ
  • Hi Jim, "I also use the S-meter extension for related things" So do I - I just wish it had better resolution for antenna testing. Average, Max and Min traces would be good too :-) Regards, Martin - G8JNJ
  • Hi John, It now works OK on the iPad on all three test sites. The mute button on the top menu is appreciated. However the Spectrum button now seems even more out of place to me, I think it should reside of the waterfall page next to the new 'Slow De…
  • Hi All, Some other thoughts. -0.5 seems to be a good compromise. However why not vary the time constant with the waterfall speed slider. So that when it's running very slow the spectrum value is -0.2 or longer and when it's running at the normal spe…
  • Hi John, Would it be possible to add something like a fast acting  white 'peak' value 'outline' behind the coloured spectrum graph, so that it's easy to see fast changes whilst still retaining the decaying 'what was there' coloured spectrum graph.  …
  • Hi Jim, Agreed, I could just hear something like a very brief snatch of voice type modulation (not white noise or digital buzz) when listening on one frequency. Could be fishing boats with some basic encryption. Regards, Martin - G8JNJ
  • Hi John, The LMS "denoiser" and "autonotch" filters work quite well and are a very welcome addition, so thanks for that. However I can't open any of the three test sites on my iPad running Chrome. The URL resolves OK but I just get a blank white scr…
  • Hi Frans, OK all understood. The 'Less buffering' and 'Compression' are associated with audio latency issues that were resolved by John some time ago. These are likely to be removed in the near future. http://valentfx.com/vanilla/discussion/comment/…
  • Hi Christoph, OK - thanks for the update. Both my Public and Private KiWi's have the same build and the antenna switching extension installed, so I don't know why there should be a difference between the two. Anyway I've rebooted the Public KiWi to …
  • Hi Frans, Welcome onboard :-) Have you looked at this document which is linked from the 'pop out' information page on the KiWi http://www.kiwisdr.com/quickstart/ There are is also a 'Bug' list that folks generally refer to before requesting new fe…