Powernumpty
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- Powernumpty
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I'm going to say this again to hopefully save you time. OFCOM don't give a flying flip unless you can show that the issue is stopping you doing some ham legal communication you could before the interference. Disruption of receive doesn't count, whic…
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Giulio if you build the magnetic loops with nulls in mind, do try to make them as symmetrical and as well aligned as possible, when subracting one loop from the other the symmetry helps (I have found). That does assume your interference is coming fr…
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I could be wrong here but one of the more pressing issues with Ethernet is noise getting in, as well as out, common mode RF could be significant and may stop more things than are affected by radiated noise. I'm still a fan of taking up fibre as it'…
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The LZ1AQ amp will work as a simple dipole, I think the balanced antenna may be easier to get working and I'm a real fan of CAT5/6 shieled feeds for RX antennas now. Mine is two loops with extra vertical sections and it is more sensitive in the vert…
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"I'm wondering if the kiwi will be able to handle it" I'm pretty sure downconverting that range has a lot of other VHF (+FM broadcast) mixing stuff to reject so filtering is important before and after the conversion, The Kiwi is just excel…
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You could try a reflector behind it. I don't think I'd get much here facing west but there could be some other interference desensing it. I'd also carefully check the voltage at the SMA pins 3.3V. Is there any way you could actually put the puck ou…
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I wonder if it is to do with searching from the url line, mine spat me into a web search even though it looked fine, twice. Maybe the & wasn't the fix the third attempt was.
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You need a nice old linear to feed a mini whip. Check it gives the required voltage at the right load, some 12V will be 18V off-load. There will be pick up on the feedline, it needs to be halted and/or fed to ground at the most affective spot(s), t…
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It prompted me for a password in that form, only. I'll tell you what worked not what should work, I'm not bright enough for that... If you want me to test (and don't have others using it) set a temporary password and I'll give it a go.
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Questions 1. Is there metal above the mini whip? 2. Is it earthed to the tower and through the coax? (try splitting it or one but not both) 3. Do you have ferrite based CM chokes at the feed? 4. Have you tried an earth at the base of the tower with…
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http://oh6bg.ddns.net:8073/?&p
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I tried my old 144MHz-28MHz transverter and was OK on some parts of the airband, not very clean though. Perhaps you could send an enquiry to transverters-store.com, they seem good value even though you would be using just the RX side. I looked for …
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I do manually save the waterfall from the right click feature but the spectrum needs a screen dump. It would be nice if the right click to save option could be set to include the date/time in the filename. I did just test a screen recording program…
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Excellent extra options, really useful for the test side, have always struggled to set the waterfall to exact values on various screen resolutions and most of the time run with the spectrum on. Also good for phone use if bookmarked to common test st…
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Not an answer but another question, has anyone used something like iMacros to automate log on? I was going to test it then remembered I dislike add-ons that have that much access.
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This is one reason why I love the Kiwi, take a laptop/tablet/phone out to the feed line and try stuff while watching the waterfall, harder to do with other receivers. I ran one channel on a PC set to slow waterfall and then an Android tablet right a…
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As 98% of my Ethernet issues are from others they are a bit expensive to sprinkle round the neighbourhood, would be very interesting to try though. I have used "certified rubbish" CAT leads without the cover wound on ferrite torroids as l…
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https://www.ukqrm.org.uk/ may be a better first visit, that and gathering any pattern changes. Also on here, other threads I have seen a lot of useful info. Took me a while to trace my nasty as the noise induced into my own house wiring blurred the…
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OK I only mention the OFCOM requirement because I'd assumed legally receiving/decoding ham transmissions would be classed as doing something that might be worth protecting, its not, you have to, for example, have a sked with other hams regularly tha…
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Listening to it does give the impression of nasty switchmode gone bad (assuming it started good). The duty time is not 100% consistent so unless it is, like previously mentioned, some kind of charging circuit I doubt it is any kind of data. The AM n…
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Are you sure the BNC is properly terminated at the far end? Is the shield fully connected all the way, has the loop slipped against something like a TV antenna? Looks like more interference than even I would expect here for a "dead" bit of…
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Another option maybe worth considering? http://www.crosscountrywireless.net/multicoupler.htm I don't have personal experience of that device because I figured for me it was cheaper to add more LZ1AQ amp and loops.
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From http://www.kiwisdr.com/ks/using_Kiwi.html "The Kiwi also includes a software-defined GPS receiver used to calibrate the SDR frequency and time-of-day. "
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Not a Mac person but from a quick search perhaps try: "I had the same issue and found out how to fix it: turn any of the sharing services ON in the system preferences. (File sharing worked for me)." (https://discussions.apple.com/thread…
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It's something beyond switchmode here, fired up the PI in another spot (more direct coax earth, right beside Kiwi) all OK if small increase in noise low down. Ran rtl_433 and strange QRM pattern is back, stopped rtl_433 footprint changes (still choo…
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Prompted by this I decided to turn my Kiwi back on, it's been off for a while, due to some weird HF wide QRM. Long story short while checking QRM decided to check weak 10m activity on another vertical with an RTL dongle on a PI but had to reboot the…
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Two possible reasons for that 1. they like to keep it simple as it's not thier main job just clearing bits from projects 2. the export (from US source) paperwork we need to sign to get the Beaglebones from Mouser in the UK, when I bought a new one I…
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From my side I guessed that A. the thing had been initially incorrectly booted with the card in but perhapse not left long enough to write the image, then power cycled, maybe a few times. B. From the comment "Formated the SD card with last imag…
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OK sorry I didn't see your reply until I edited mine (not sure how this forum refreshes). I wasn't aware that it shuts down and I am little confused how the default DHCP gateway address could be wrong. I have set one Kiwi to a fixed IP address but…
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Does it really say 3.3V lol - maybe ther is a later version, I did a very quick search, picked the first one. I think this probably needs John (A.K.A. JKS) to comment but some further fault finding before that.. Check there is nothing like Alumini…