G8JNJ

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G8JNJ
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  • You can get yourself in a mess if you manually set the bandwidth of the LSB, USB or CW so that it includes the side band you don't want. Likewise if you use Ctrl + to increase the passband, you can go beyond the point of it being single side band an…
  • Hi John, Thanks for this latest enhancement it is a significant development, especially for us who enjoy finding utility stations. I think you have done a great job with the initial sorting. Having dome a lot of this myself when trying to combine in…
  • i have a metal case, i'll try lowering the clock The metal case is anodised and the end plates don't always make good electrical contact with the rest of the case metalwork. If you can remove the surface layer of anodising from the countersunk holes…
  • Are you using the plastic case supplied with the KiWi ? If so it's likely to be mostly direect RF radiation. Fitting a metal case may help. See this previous thread for some ideas. http://forum.kiwisdr.com/index.php?p=/discussion/comment/7539#Commen…
  • Hmmm. This is an interesting idea. Just thinking out loud, as I could definitely make use of something like this to chug through a load of rarely used but 'interesting' frequencies. Maybe it would be possible to use something like the ALE url string…
  • Apart from occasional pausing and staying stuck on a channel for no obvious reason, about 6 hours is typical. However it does seem to depend upon how many other users there are on that KiWi and what they are doing.
  • Hi John, The new passband tuning enhancements are very good and definitely improve the usability. Thanks again for all your hard work and commitment. Regards, Martin
  • Excellent, thanks John. That feature has already been very useful in helping to determine the best way to deal with occasional overloads we had been experiencing. I've modified a surplus binary switched attenuator so that it's now working as a serie…
  • Ah not previously seen that from Chris. Looks useful. Regards, Martin
    in Tuning SSB Comment by G8JNJ October 9
  • Yes it's just a narrow audio band. If you are lucky and the KiWi is operating in 3 ch mode then you can get up to 20KHz of audio bandwidth, but normally you would be limited to 12KHz max. However why would you wish to do this ? Simply use the KiWi w…
    in Tuning SSB Comment by G8JNJ October 9
  • >Speaking of SDR#, it would also be delightful to connect/control a Kiwi from that interface Yes you can do that using with Catsync and a serial interface null modem emulator such as Com0Com https://catsyncsdr.wordpress.com/ http://com0com.source…
    in Tuning SSB Comment by G8JNJ October 8
  • Great, thanks again John. I normally try to log a few new signals each day, and it was becoming rather tedious adding new tags. Regards, Martin
  • OK thanks John, Now I understand teh controls a bit better, I'll continue trying different settings. Regards, Martin
  • With regard to the audio delay, which I accept can be an issue under certain operating conditions. Some time ago I measured a few well known SDR's using this method. http://forum.kiwisdr.com/uploads/841/GM1H5DMATTS4.png Airspy HF plus local PC http…
  • Most voice signals tend to be found on frequencies rounded to a minimum of 1KHz (maybe 500Hz on occasions) so I don't find it too difficult to tune to those, even when almost fully zoomed out. CW with narrow frequency spacings is a different matter,…
    in Tuning SSB Comment by G8JNJ October 3
  • >I am an electronics engineer with over 50 years experience with communications receivers. I don’t >deserve or appreciate condescension from some people on the Forum. Unfortunately, you initially only gave a brief list of issues, with very lit…
  • Hi John, "spectral leakage suggests B-H has the property of raising the noise floor slightly in exchange for improving the leakage issue." Maybe if B-H is supposed to have these drawbacks, the existing Hanning & Hamming parameters cou…
  • Thanks John :-)
  • - Recommended Wellbrook loop ALA1530LN is a poor HF antenna. Resonant antennas should be used on HF. I think you may be approaching this from the wrong angle, or be lucky enough to have the space to erect large antennas. The KiWi is a broadband 0-30…
  • I always find it interesting that different people have different experiences when using the same product. I guess a lot depends on what you are using the KiWi for and how you are using it. And in this case the points raised differ from my observati…
  • Hi John, OK no problem. It's not really an issue, I only mentioned it in case it was related in some way. Regards, Martin
  • Thanks again John. I noticed another occasional 'oddity where the popup passband width frequency markers don't appear when you remove the DX labels banner using the Y command, but I don't know if this is related or something else. I only noticed thi…
  • Hi Josef, I quickly tried experimenting by adding combinations of mode and passband to individual frequencies in ALE url string (as defined in the user guide for other non ALE modes), just in case this would work, but I didn't have any luck. I can't…
  • Just noticed that the mark / space vertical markers don't move with the receive passband either. If you shift the waterfall left or right, the markers stay in the middle of the spectrum. Unfortunately, I think this is a new bug. Sorry, Martin
  • Update. If I close the browser sessions once the KiWi has stalled, it recovers almost immediately. Leaving the browser running it takes about 2 minutes to recover. Regards, Martin
  • Hi John, Great improvements, very, very much appreciated. This just reinforces my view that my KiWi's have been among the best radio related purchases of all time, and they are definitely well up in the 'top ten' of my 'hit parade' chart. Thanks aga…
  • Typing errors - easily done Try Taiwan (Taipei) #1: (1.465) http://jplin53a.proxy.kiwisdr.com:8073/?ext=ale,4216.25,6281.75,8396,s:1.5 Hokkaido (1.465): http://sdrhkd.ddns.net:8073/?ext=ale,4216.25,6281.75,8396,s:1.5 Chongzou (1.465): Not available …
  • Hi John, Yes that fixed it. Thanks again. Regards, Martin
  • One small bug (possibly). I've found that if you have opened a session using a url string and that remains in the browser, it may not be easy to switch to another predefined scan. The url scan seems to override anything else. I have to halt the url…
  • Hi John, Thanks for adding the url string capability so quickly Absolutely brilliant :-) Regards, Martin