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RE: [aprsisce] OT: backpack antenna for 2M

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  • Fred Hillhouse
    I have not found the weight on this item but it would make a nice housing for tracker hardware.
    Message 1 of 13 , Feb 21, 2012
      I have not found the weight on this item but it would make a nice housing for tracker hardware.
      Best regards,
      Fred, N7FMH

      From: aprsisce@yahoogroups.com [mailto:aprsisce@yahoogroups.com] On Behalf Of Lynn W Deffenbaugh (Mr)
      Sent: Friday, February 17, 2012 15:15
      To: aprsisce@yahoogroups.com
      Subject: Re: [aprsisce] OT: backpack antenna for 2M


      That's precisely why I was so excited when  Byonics was working on extending their MT-AIO into a TT4 based unit with transmit AND receive capabilities and were including a Bluetooth connection inside the pelican case.  No issues with weather and just strap it to the top of your pack and go.  The TT4 and internal GPS would do the tracking, but you could still ash up via Bluetooth for APRSISCE on WinMo to do fancy work when/if you want to including IGating the event's other "deaf" trackers (they're not dumb, because they can still "speak).

      I've heard they haven't given up, but the issue they're faced with is the RF coming out of the Power Amp had a disturbing tendency to mess up the rest of the package, including blowing out the transceiver!

      Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

      On 2/17/2012 3:02 PM, Fred Hillhouse wrote:
      This is mostly out of topic except for the fact I will be using my WinMo platform and APRSISCE for the user interface.
      I am exploring antennas options for an APRS only radio. I will use it while hiking, as in actually moving along a trial or through brush rather than while I am stopped.
      The only design I have ruled out so far it one that uses a section of tape measure. Hmm, ruled out tape measure? I figure the edges can be a hazard once it is sharply bent. Yes, a whip end can be poked into an eye. I guess amateur radio is a risk sport, like skiing.
      I also have not convinced myself that a BNC antenna is good either since I am often in increment weather while hiking. I don't want to deal with sealing the antenna after assembling at the trail head.
      I saw a "dream" example for SAR at one point in the past but after much Googling, I have not stumbled back on it. I seem to remember the radio, GPS and TNC was all in a metal housing and the antenna was protruding out the top. The GPS antenna was outside as well. Of course it has to be since the housing was metal.
      Anyone with experience that would like to share it? Do you have photos as well? Since this is OT, a direct response might be best. I will look at the SAR APRS group as well.
      I am currently leaning towards a T3-301 for this project.
      Best regards,
      Fred, N7FMH

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