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Thread: Transponder-Mouse

  1. #11
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    Quote Originally Posted by kered View Post
    10 meters shorter of coax is a big saving, not only in the cost but also in signal loss. Well worth putting in the ethernet module, then you can run it almost anywhere.
    the first link i posted in my last message you have the 2 items needed, its also a 2channel that means you can put up 2 antennas say a small yagi and a colinear. if i had the choice again thats what i would go for.

    you could also get the 1 channel and the ethernet unit http://www.jmz-shop.de/mode-s-beast/...?id_product=14 and save a few bucks but for me the difference is small compared to the advantages of 2 channel

    Regards
    Derek
    G'Day Derek.
    Thanks for the link to the Beast Ethernet option. Is this what you did?
    I assume one needs to dismantle the T-Mouse, add the Net option, then transfer it to the larger box ?

    I've got some extremely low loss coax on the way from Germany, and a backup of Heliax coming from the USA, which I'll probably use for the wideband antenna I have connected to my scanner.
    I could also connect it to one of the DVB-T's and use that to run HDSDR (which should be interesting in itself).
    I'm also hunting for the appropriate adapters I'll need for the 2 DVB-T tuners that are on their way.
    I've made up a temp patch cable that goes N female to BNC, then BNC to F then F to PAL on the receiver end - just to connect to the base antenna.
    I also had to custom build a mounting bracket for the SAN-1090 antenna today - yet another 2 hours wasted, but hey, It's a hobby - so no big deal ;-)
    I've calculated approx 3db loss on the cable over the 15-17 meter run I need (at present) but with 7db gain on the antenna, I should up with a net gain of 4db. Maybe a bit less due to the adapter.
    The link you sent me re the Westflex seems like a good choice also.
    If, based on the ranges I've heard of people getting with a mobile antenna out a window, this setup I'm putting together should do OK (even with the losses).

    I will probably end up with a T-Mouse in the end though... The DVB-T's are just to see if it works (then use on HDSDR).

    Like you said, a 2nd antenna (yagi) could be used with the T-Mouse, but I life far from the airport (40Km) so the only thing that would help me is a quad phased array !!! ;-)

    Regards, Greg.
    Last edited by GregHudson; 2012-11-28 at 11:47.
    GNS 5890 (German), 2 x DVB-T Dongles (China / USA), Mobile One SAN-1090 external base antenna (Australian), Heliax coax (USA).
    HDSDR, Plane Plotter (full version, but not working), adsbScope, Virtual Radar.

  2. #12
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    Yes i have that option but only 1 channel(big mistake)
    Its a waste of money getting the complete T-mouse and the ethernet option as you are paying for 2 boxes, better to get either the 1 or 2 channel board and the ethernet (which comes with a bigger box)
    You would need to dismantle the t-mouse and refit it into the ethernet box.

    40km to a yagi is nothing, from what i read people are using them to get ground traffic at 50nm (90km)away
    Another option is to use for main antenna a long range colinear and a smaller antenna to fill in the hole of the doghnut effect(lost overhead traffic) the colinears and high gain antennas are prone to.

    I just got my funcubedongle pro+ today

  3. #13
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    I'm starting to ponder splicing 2 antennas together too (only have microadsb and 1 channel beast which doesn't like something in my area so is offline atm)

    Also calculate connector loss into your equations Greg. You can easily lose ~3dB per connector. So adding 2-3 stepdown pigtails like you are may mitigate any gain you had on the more expensive cable totally.

    Surprised you got cable in from overseas, heliax is used by VF and other providers in the phone exchanges for cell use, and sometimes LMR400 also (which is the best mid range cable made by lots of suppliers, I got mine locally from a China export for as little as $5/m)

  4. #14
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    Quote Originally Posted by kered View Post
    Yes i have that option but only 1 channel(big mistake)
    Its a waste of money getting the complete T-mouse and the ethernet option as you are paying for 2 boxes, better to get either the 1 or 2 channel board and the ethernet (which comes with a bigger box)
    You would need to dismantle the t-mouse and refit it into the ethernet box.

    40km to a yagi is nothing, from what i read people are using them to get ground traffic at 50nm (90km)away
    Another option is to use for main antenna a long range colinear and a smaller antenna to fill in the hole of the doghnut effect(lost overhead traffic) the colinears and high gain antennas are prone to.

    I just got my funcubedongle pro+ today
    G'Day Derek.
    The only reason I was thinking of the T-Mouse was to save me soldering etc. (I'm half blind & don't have a steady hand. Parkinsons maybe? I'm not game to ask!)
    I'm sure if I tried to build a Beast, it would be a total disaster / failure / waste of time & money - and that's being positive ! ;-)

    Well I must say that ground traffic at 90Km is impressive. I may end up with one if that is the case.

    Please let us know yhow you go with the FunCube

    regards, Greg.
    GNS 5890 (German), 2 x DVB-T Dongles (China / USA), Mobile One SAN-1090 external base antenna (Australian), Heliax coax (USA).
    HDSDR, Plane Plotter (full version, but not working), adsbScope, Virtual Radar.

  5. #15
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    Quote Originally Posted by Oblivian View Post
    I'm starting to ponder splicing 2 antennas together too (only have microadsb and 1 channel beast which doesn't like something in my area so is offline atm)

    Also calculate connector loss into your equations Greg. You can easily lose ~3dB per connector. So adding 2-3 stepdown pigtails like you are may mitigate any gain you had on the more expensive cable totally.

    Surprised you got cable in from overseas, heliax is used by VF and other providers in the phone exchanges for cell use, and sometimes LMR400 also (which is the best mid range cable made by lots of suppliers, I got mine locally from a China export for as little as $5/m)
    G'Day Ob.
    The Patch cable I made up is only temporary, until I get the Heliax - which is on ebay here:
    http://www.ebay.com.au/itm/Andrew-F1...ht_4748wt_1397

    At US$50 for 50ft with 2 N connectors, it seemed to be a decent price. On the downside, the freight was another US$40 !!!

    I have found another cable supplier, which would be ideal for Beast / T-Mouse users here:
    http://www.moonraker.eu/Avionics-and...SMA-PATCH-LEAD

    Regards, Greg.
    GNS 5890 (German), 2 x DVB-T Dongles (China / USA), Mobile One SAN-1090 external base antenna (Australian), Heliax coax (USA).
    HDSDR, Plane Plotter (full version, but not working), adsbScope, Virtual Radar.

  6. #16
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    All there is to solder are the leds, usb and antenna socket, the rest is all done. I'm sure someone local could do it for you.
    That heliax cable looks good, the moonraker cable is also available on ebay.co.uk
    Funcube working fine, only limited by the antenna, i have it on a discome at the minute.
    Regards
    Derek

  7. #17
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    btw on youtube there are 4 videos ilustrating whats involved in the soldering http://www.youtube.com/watch?v=fQzNCN_BQq0 is the first 2,3 and 4 are there too

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