G8JNJ
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- G8JNJ
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Hi John (ZL1GWE), Great stuff - John and Christoph are doing some really interesting work here - So our thanks are definately due to both of them. Regards, Martin - G8JNJ
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Hi Bonnie, Yes they are among the 16MHz Ship to Shore marine channels, but I'm not sure if they are meant to be used for ship to ship. There are only 7 simplex channels in that block. I'm not a sailor so I don't know if this is permitted ? Do you ha…
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Hi Rob, Funny lot down your way :-) If they are worried about the security implications, why are they bothered that it's showing the wrong address ? Personally I'd suggest that they simply manually enter their Callsign and location into the callsi…
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Hi All, I agree even a 100km accuracy would be a good starting point. The advantage of the KiWi network is that it is farily well distributed so once you have a rough location it should be possible to use other KiWi's closer to the suspected locatio…
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Hi Ron (and others), Feel free to use my 'Private' KiWi, I keep it running for experiments such as this but chose not to publish it to the general radio community. http://southwest.ddns.net:8077 Most of the time it's using whatever antenna is selec…
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Hi, Take a look at this thread. http://forum.kiwisdr.com/discussion/923/sound-recording-from-multiple-opened-browse-windows-for-diversity-reception Although it's not available in real time, this may be a step towards it. By processing time stamped …
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Hi John, Ooops, sorry I missed that one when I browsed the list. Regards, Martin - G8JNJ
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Hi Ron, It's not listed on the DRM schedule. http://www.hfcc.org/drm/ However looking at the HFCC Schedules http://www.hfcc.org/data/b17/ And Radio Romania in particular http://www.hfcc.org/data/schedbybrc.php?seas=B17&broadc=RRO Only two tra…
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Hi, Maybe the user info could be put on the top banner where there seems to be plenty of space. The pop out panel which gets hidden by any extensions that are running could then be removed. Maybe if multiple extensions are being run they could overl…
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Hi John, Ooops too late. Never mind, I don't think he will use it as it stands, but it's worthwhile keeping an eye on for future developments. Regards, Martin - G8JNJ
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Hi John, Agreed it is complex. I'll let Peter G3PLX know that this has now been implemented in case it's of interest to him. Regards, Martin - G8JNJ
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Hi All, Interesting thread. Does adding the time stamps to the I/Q stream now open up possibility for Time Of Arrival location of transmitter sites ? Regards, Martin - G8JNJ
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HI, I ran Dream and Sodira in parallel using VAC and tried a few DRM stations. Sodira only locked and produced audio for about 10% of the time Dream worked OK. In turn Dream would typically only stay locked for periods of up to 2 minutes or so and t…
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Hi Mauritz, I have just updated my KiWi with antenna switch to V1.141and it works OK. Just a thought - have you upgraded to the most recent version of switch extension ? https://github.com/OH1KK/KiwiSDR-antenna-switch-extension The latest version h…
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Hi Roach, "The loop itself is sitting in the same room as a lot of other electronics" Ah that explains it - be sure to let us know how you get one once the loop has been moved. Regards, Martin - G8JNJ
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Hi John, Today I experimented passing the IQ stream to SDR Sharp, HDSDR & SDR Console using their soundcard IQ input options. Set the applications to 0Hz and tune with the KiWi browser It works quite well and I can now use some of the features…
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Hi John, Thanks for the update, I haven't installed it yet but I had managed to figure out that the IQ entry in the dx.json file was the problem and had edited it out to get things back up again. I tried it this afternoon with Dream and it works ver…
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Hi John, I concur with Dirk, it really doesn't like adding IQ entries into DX Jason - in my case it caused a catastrophic crash and I'm still trying to get my KiWi's back up :-( Regards, Martin
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Hi Roach, I took a quick look at your KiWi SDR and something does not seem right. If you are using the Welbrook ALA 1530 I would have expected it to show much higher signal levels on the Medium and Long wave broadcast bands (despite the other noise)…
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Hi, Yes that's definitely broadband-over-powerline (BPL) interference, the notches in the noise spectrum on the amateur bands is the big clue. Unfortunately these sort of devices are the scourge of amateur radio operators in the UK, as even though i…
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Hi, Yes that looks like a good candidate - well spotted WRT the web article. Regards, Martin - G8JNJ
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Hi Kevin, 1. On the S-Meter, even with a low signal report, I get the "OV" light up, is this normal, and should I worry about it? It indicates ADC overload, if you look on the spectrum display you may find some broadcast signals are above…
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Hi, Shift left click on the tag banner above the waterfall to add additional tags with notes. Regards, Martin - G8JNJ
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I'd agree, I think a password override would be the more useful methodology. Just a thought - I wonder if some sort of individual 'subscriber' key could be issued and stored as a cookie so that you could give different privileges to different types …
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Well I'm an old ham so I guess that's OK :-) Regards, Martin - G8JNJ
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Hi Emmanuel, I had some noise today and I found that turning the AGC off and manually setting the gain seemed to help with impulse interference. Regards, Martin - G8JNJ
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Hi Bonnie (and All), It's a good idea to periodically make a SD card copy too - it's saved me a few times when I've messed something up really badly. Regards, Martin - G8JNJ
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Hi, If you are just having problems with background noise rather than actual interference, you may find it worthwhile experimenting with different receive bandwidths and AGC settings. Adjusting the AGC threshold away from its default value (in the e…
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Hi Mauritz, All good. BTW if you have back to back input protection diodes connected across the amplifier input (as I show in the diagram) you may find they add to your IMD. I've had to connect them in series across the supply rail so that they are …
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Hi Mauritz, Ah OK I see what you are doing, I had wondered about the increase in noise around 30MHz - I do the same but I was keeping it to myself as my secret weapon :-) What's the GP antenna - that's really good on the NDB band. Keep up the good…