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https://forum.kiwisdr.com/index.php?p=/discussion/comment/19668#Comment_19668 Thanks, Martin, I also plan to install my KiWi on one of our high sites in our WISP network. Not so far that if it breaks its not a drive on for a hours on a dirt road, ho…
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Never mind, someone introduced me to NZ Post YouShop
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Well, interestingly, the pot on the amplifier itself did nothing noticeable with the signal strength or noise, however the pot on the Bias Tee has the most dramatic effect. I assume the Bias Tee pot is LNA gain and the pot on the amplifier is IF gai…
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Ill give it another tweak tonight :-)
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I found that the gain control on the bias tee had the most overall affect, however it did increase the noise. I'm not on SNR 22/16 dB which is a big step up from under 10. The control on the antenna had the least affect. I may have wound up the bi…
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I wound up the gain on both the antenna preamp and the Bias Tee. The Bias Tee is quite sensitive, and ramps up the noise floor, so its a balancing act. I'll keep tinkering, however I can now decode DRM signals I couldnt before, due to lack of signal…
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I'm considering some kind of multiplexer and have two ML-30's so one is north-south and one is east-west orientation.
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/19620#Comment_19620 Ah of course an end fed is unbalanced... Yes, its an ML-30(+) however I havent messed with the gain controls. Ill have a look tonight. ;-) Thanks Sean
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/19615#Comment_19615 Thanks Martin. I am primality looking at an RX antenna for my KiWi. Low noise would be great. Techminds use an end feed balanced antenna when comparing against other on…
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The output is 13.8V 1.5A, and the DC output is 5V 2.5A. The transformer does run warm, however its a comfortable temp. The DC stage is one of these. For the price, I couldn't buy the parts locally cheaper.
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/19587#Comment_19587 Well, finally had time to fix it. Turns out it was a fuse inline with the AC input. :-D
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I've been using the HFDL extension, and yes, it's quite impressive. I spend a hour in the evenings scanning through the bands. Its good down time.
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I built a nice linear power supply. Some parts were new, some old. It died this morning. :-( It will have to wait until the weekend. Back to the Apple wall warts.
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Thanks, Martin. I did add the attachment as a ZIP. (thought I did) File share instead
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True, I didn't spend a lot of time on it, as I was scanning the bands having a coffee before work, and noticed how strong this signal was. Next time it comes up that strong, ill launch TDoA and do a bit more research. Ill take my tinfoil hat off n…
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Ah nice. its being maintained by priyom!
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Seems rivet is long abandoned and the binaries are no longer available and only 12yr old source code is there :-/
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Ah good to know thanks both! Ill keep beavering away. I got some gibberish from a signal the other night then after about 30 mins, gave up making sense of it. :-)
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Ah yes, its public http://21996.proxy.kiwisdr.com:8073/ Based in Napier / Hawke's Bay / New Zealand. Not that many of us in this region.
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I used my own KDSR2 Priyom is a great site for all things related to these stations
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Cant find that signal on any other Kiwi's around Hawke's Bay.
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It is, yeah, in Napier.
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A quick update. I received the DC power supply, gave it some tests and it seems like a nice stable 5.18V on the output. I replaced the two Apple bricks, one for the KSDR and one for the Bias Tee, and connected them to the new linear DC supply, and …
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Thanks for the feedback, and apologies for my knowledge gap here on the development of the device.
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Hi Martin, That was actually going to be my next option, however I will need to get a good length of coax as a run from there to the garage would be 60 odd meters. Off to Jaycar this weekend then :-D Cheers Sean
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I have moved the loop antenna to the rear of the property away from the house, and I have a small room in the rear of the garage which doesnt have much in the way of electronics in it where the KSDR resides, and I also put that into a metal box (wel…
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Brilliant, really appreciate the advice!
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Make sense. To be honest, the antenna is a cheap MLA-30+ which in fairness, does an excellent job of increasing signals and reducing the noise floor, and given I live in a suburban area, I cant complain for the price. My next step for an antenna th…
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So, anecdotally, I "think" its the Apple power supplies. Unfortunately I only have one pure DC supply (battery pack with USB), however when I swap out one of the Apple bricks, the noise almost dissapears. When I switch between the Bias Te…