jks

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jks
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  • Direction Finding and linking existing KiwiSDRs

    jksjks
    Wow -- check Christoph's latest post: https://github.com/jks-prv/Beagle_SDR_GPS/issues/130#issuecomment-347206064

    It's a plot of a ground wave TDoA solution for DCF77 using three Kiwis relatively close by.

    KA7UZL1GWE

  • Sound recording from multiple opened browse windows for diversity reception?

    jksjks
    Make sure your fork is updated. Things are changing quickly. I just took out those extra prints that had been left in.

    KA7U

  • Sound recording from multiple opened browse windows for diversity reception?

    jksjks
    You can't run the old kiwirecorder with v1.151 Use the current one. And you can't use the latest one from my branch on Kiwis running earlier than v1.151 See the comments above. I haven't tested the latest one with the GPS timestamp support with DRM -- and there are no DRM transmissions on right now..

    KA7U

  • Clock drift in WSPR mode

    jksjks
    When I connect to your Kiwi, and look at the status panel at lower left, it shows a passband center frequency of 14097.26 for your 20m WSPR connection. Why is that? It's supposed to be 14097.10 Did you bump the "dial"? The WSPRs on 30m (10140.20) and 40m (7040.10) were fine. This is exactly the 160 Hz error you see in the wsprnet.org database.

    Note that for the WSPR extension the freq shown in the status panel, admin page, etc. is the PB center instead of the carrier freq (dial freq) The dial freq for WSPR should be 14096.35 (750 Hz lower than 14097.10) unless you've changed the WSPR offset value on the admin page. You will see the dial freq in the frequency entry box when the WSPR extension is closed. I can't remember exactly why I did this, but my guess is that I thought it made sense to show the more familiar PB center freq for WSPR that everyone is used to.

    WWVH @ 15 MHz was only off 8 Hz. There were no recent GPS solutions because all the sats had drifted out of range and the acquisition process was getting locked out by the three running WSPRs.

    KA7U

  • HF Broadcast Schedules

    jksjks
    It's buried in the bug list, but there is an entry that says:
    • Use info from public databases, e.g. shortwave broadcast schedules (EiBi) 
    I have seen the hfcc.org list. I looked at some others too, but a lot of them have restrictions on re-publication. It's not clear exactly what that means in the context of dynamic access by Kiwi code as opposed to re-publication in their entirety. Would probably have to negotiate with the authors about that issue. For example WebSDR has this.

    KA7U