VK2YCJ
About
- Username
- VK2YCJ
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Comments
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Hello Jim, CMI as in Common Mode Interference ? Okay, cables as in antenna, GPS, power supply and Ethernet ? Some Common Mode Choke designs created by K9YC using Fair-Rite Mix-31 cores might do a good job on those cables. I saw or read somewhere t…
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That is excellent news. I am going to put one of my KiwiSDRs into a small portable box with batteries and use the spectrum and waterfall displays to show local HF band noise (0-30 MHz). I'm thinking that a trial and error exercise with common mode…
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Hello John, do you know when the next Massdrop (now Drop) will be available ? The website suggests MAY-03 and suggests 774 requests. Thanks, Jamie VK2YCJ
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Hello Rob, Thanks for the links and suggestions. Jamie VK2YCJ
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John, I put in a Massdrop request and order a month or two ago and the money was refunded to me - I guess for the Seeed production delays that you mentioned previously. My Massdrop order request is still there with REQUESTED showing in red in a re…
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Hello Rob, Thanks for that info. Its always good to find out info from those that have done it before. I currently have 4 x KiwiSDRs and Im waiting for MassDrop to mature so I can get another 2 x KiwiSDRs. Two of the KiwiSDRs have been in ser…
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Hello John, Thanks for that tip and link. I have ordered a couple of the active GPS antennas suggested by Jim - PCTEL GPSL1-TMG-SPI-40NCB and Im about to order a couple of the splitters too. Thanks John, and thanks Jim. Jamie - VK2YCJ
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Thanks Jim, That RPi project sounds very interesting. The links you gave above are very good and Im starting to order those parts. With regard to the active GPS antenna: 1. The specs look like the preamp has a 2.5 dB noise figure with 40 dB of…
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Very good thanks. Jim, what does that Raspberry Pi in the photo do ? The Time Pi probably means it is a GPS synced time standard. Do you have details of that too ? Guessing aloud it possibly gives you the time standard over Ethernet for yiur l…
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Hello Jim, Just got this message. Wow - you've included some great info so thanks for all of that. I'll check those links right away. One extra BONUS question - does the GPS signal contribute timing and/or frequency stability to the KiwiSDR ? …
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Hello John and Jim, Okay cool. The KiwiSDR population is growing in your photos - same phenomenon here. I see from the links that your GPS splitter is available in different sub-models with options for amplifier and connectors and so on. Did you …
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Hello John and Jim, Thanks for the answer and clarification. Jim, could you elaborate on the gear in your QRZ.COM photo ? Is the flat square box on the right a two way splitter for the GPS antenna ? And the small blue box to the left of that - i…
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Hello John, As soon as you said that I realised I mis-stated the case. On all mono-band antennas a single instance of WSPR-autorun will operate and the remaining 3 sessions will be available for public users. So no special callsign feature needed…
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The progress you guys are making with these WSPR mods is very exciting. To be able to have a multiband HF antenna and a dedicated WSPR KiwiSDR to decode 6-8 bands at the same time 24*365 is nothing short of amazing. Keep up the good work guys. 73…
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Hello Martin, Great answer, I'll change to the 80m_JA version tomorrow and later when we have 8 x WSPR auto-run sessions running with the RPi mods I'll try doing both like you. That's a great suggestion. Thanks, Jamie - VK2YCJ
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John, a TCI-530 is a commercial broadband HF antenna made by TCI in California. Pretty serious stuff. http://websdr1.utahsdr.org/info/TCI530.pdf
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Hello Rob, Thanks for the reply. Ill order the Rpi and a spare tomorrow. I have 3 x KiwiSDRs that are going together in a box at a very low noise rural location with a shared antenna and front end protection. One will be the dedicated WSPR uni…
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Hello Rob, I have a dedicated KiwiSDR running 6 x WSPR auto-run decoding tasks and I'd like to use your scheme to push that up to 8 sessions with better performance and greater reliability. The bands I would like to cover are 160m to 10m - 9 band…
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Hello John and WA2ZKD, Yep, that is the problem - exactly as you explained. We tried running 5 and 6 WSPR auto-runs and it worked reliably. Running 6 WSPR auto-runs plus 1 x general coverage radio session broke it. So Rob's kiwiwspr scheme with …
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Thanks WA2ZKD, I found the link to that info. http://forum.kiwisdr.com/discussion/comment/5179#Comment_5179
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Hello John, yep that's what we figured. Up until now we have run 6 x WSPR sessions and left 2 x general coverage radio sessions available. In that configuration we had seen the waterfall display run very slowly and guessed that 6 x WSPR sessions r…