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Thread: best antenna

  1. #2061
    Captain abcd567's Avatar
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    Quote Originally Posted by charan View Post
    yes sir i can make that power inserter! and i've seen your pictures where you specified those splitters and parts. really thanks for that sir, helping me a lot..! i already have 100pf capacitors just need to buy inductor ! once its done ill update you on my build...!

    update-
    i bought this inductor http://www.ebay.in/itm/5Pcs-Set-New-.../271523853796?

    @F-EGLF1

    Thanks!
    HOW TO MAKE A POWER INSERTER USING A TV CABLE SPLITTER, AN INDUCTOR & A CAPACITOR
    Power_Inserter_steps-2.jpg

  2. #2062
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    Quote Originally Posted by abcd567 View Post
    The BFP420 as amplifier can work over a wide range of frequencies. It is best at 1.8 GHz (lowest noise).
    As Oscillator it can be used up to 10 GHz.
    See image below.
    Attachment 5352

    It can act as amplifier at frequencies higher and lower than optimum frequency of 1.8GHz.

    At higher than 1.8 GHz, it has reduced gain & increased noise.

    At lower frequencies it has increased gain & reduced noise....better for air-band .

    See image below how the Gain increases as frequency goes down.
    (9 dB @ 6 GHz, 21 dB @ 1.8 GHz, 26 dB @ 0.9 GHz)
    Attachment 5354

    The full specifications of BFP420 can be downloaded from here:
    Attachment 5357 http://www.infineon.com/dgdl/bfp420.pdf?folderId=db3a30431400ef68011425b291f205 c5&fileId=db3a30431400ef6801142769cd120763
    Fantastic sir ! now i'm even more exited..! and inline amplifier is shipped as well ! Thanks for power inserter pic !!!!
    RTL SDR : T-VEVZ1

  3. #2063
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    Why every one uses & recommends Raspberry Pi when there are so many other Open Source Boards?




  4. #2064
    First officer 1090 MHz's Avatar
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    Quote Originally Posted by abcd567 View Post
    Why every one uses & recommends Raspberry Pi when there are so many other Open Source Boards?

    Well the Raspberry Pi seems to be the favorite of everyone, it's what FlightAware is using in their FlightFeeder radios. I took mine apart to see what they were using... see here: http://ads-b.ca/fa/

  5. #2065
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    Quote Originally Posted by 1090 MHz View Post
    Well the Raspberry Pi seems to be the favorite of everyone, it's what FlightAware is using in their FlightFeeder radios. I took mine apart to see what they were using... see here: http://ads-b.ca/fa/
    All I can say is crude! Can they not even get the led holes in a straight line?
    I hope they did not charge you a lot for that lash-up.
    Ben.
    FR24 F-EGLF1, Blitzortung station 878, OGN Aldersht2, PilotAware PWAldersht, PlanePlotter M7.

  6. #2066
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    Quote Originally Posted by F-EGLF1 View Post
    All I can say is crude! Can they not even get the led holes in a straight line?
    I hope they did not charge you a lot for that lash-up.
    Ben.
    It's their equipment that they sent me, I'm just hosting it on my tower for about a year now. It's very much 'home made' yes and a prototype ... but it's been working very well for the past year. They did not cheap-out on the radio... that's a high end and expensive Mode-S Beast radio card inside that box.

    http://shop.jetvision.de/epages/6480...Products/41000

    They just introduced a new receiver that has a metal enclosure.. this is an official radio that will also be for sale, much like that Radarcape.

  7. #2067
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    One more, which was missed out in my last post, the Banana Pi.

    It is a good one, with 1 GB memory & builtin WiFi, all in $49.99

    http://www.amazon.com/Pi--Banana-Mai..._1420642406534

    Last edited by abcd567; 2015-01-07 at 16:32.

  8. #2068
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    Here is an interesting comparison of Raspberry & Banana.

    Raspberry Pi vs Banana Pi: http://raspi.tv/2014/banana-pi-review-first-impressions (read comments also, tedious but useful).

    Raspberry Pi B+ vs Banana PRO: http://www.cnx-software.com/2014/10....ry-pi-model-b/
    Last edited by abcd567; 2015-01-07 at 19:09.

  9. #2069
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    Claim of Banana Pi manufacturer "SinoVoip Co." against Banana Pro manufacturer "Lemaker":
    http://www.banana-pi.com/eaxw_view.asp?id=353

    Website of Banana Pro manufacturer "Lemaker":
    http://www.lemaker.org

  10. #2070
    First officer 1090 MHz's Avatar
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    Well the Sky is the limit when it comes to the Pi .. or is it? Check this out... these guys sent one up over 116,000 feet (35.5Km) to the edge of space!

    http://www.daveakerman.com/?p=1669

    superman2-1024x582.png

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