<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Humm</div><div><br></div><div>Good point didn't think of that... Maybe loaded whip..</div><div><br></div><div>Regards</div><div><br></div><div>Peter<br><br>Sent from my iPad</div><div><br>On 17 Jul 2014, at 1:15 pm, "Darkside" <<a href="mailto:lenniethelemming@gmail.com">lenniethelemming@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><p dir="ltr">Trailing long wires are a bushfire risk. We have had payloads land across power lines in the past. </p>
<p dir="ltr">- Mark VK5QI</p>
<div class="gmail_quote">On Jul 17, 2014 12:15 PM, "Peter" <<a href="mailto:vk3tbn@hotmail.com">vk3tbn@hotmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Andy<br>
<br>
Thanks for trying the ISS transponder idea ..... Shame it didn't work, or maybe it did but there was no down links station in same area..<br>
<br>
Maybe HF is the way to go... CW.. Lat long... Or PSK... With trailing loaded long wire ... ( thin gauge shellacked copper wire) ....<br>
<br>
Just a thought. Plenty of QRP. Txer kits about.<br>
<br>
Regards<br>
<br>
Pete<br>
<br>
Sent from my iPhone<br>
<br>
On 17/07/2014, at 11:41, "Andy Nguyen" <<a href="mailto:an@comms.net.au">an@comms.net.au</a>> wrote:<br>
<br>
> Hi Jamie,<br>
> For the VK3YT-x PICO balloons that was pretty much it!<br>
> There were some smarts in some versions to calculate ISS passes and attempt to send aprs packet to ISS but the conclusion was 10mw on a balloon was not enough for ISS.<br>
> Regards,<br>
> Andy<br>
><br>
>> On 17 Jul 2014, at 8:47 am, <a href="mailto:vk2ycj@bravo.net.au">vk2ycj@bravo.net.au</a> wrote:<br>
>><br>
>> Hello,<br>
>><br>
>> The Pico Balloons sent off by Andy VK3YT has been very inspiring to lots<br>
>> of people - me included. I'm amazed !<br>
>><br>
>> I'm running VHF APRS on 2m in the car and would like to try HF APRS in the<br>
>> car on 30m.<br>
>><br>
>> Later something in a balloon might be fun too.<br>
>><br>
>> So, as I understand it, in the car on VHF APRS we use smart beaconing to<br>
>> keep the resolution of spots up but with minimal packets to prevent VHF<br>
>> channel congestion. Correct ?<br>
>><br>
>> I'm not sure what HF APRS does in the car - but my guess is that it<br>
>> reduces the spot resolution to give enough spots to be useful and to<br>
>> greatly reduce HF channel congestion. Correct ? Any other smarts<br>
>> involved ?<br>
>><br>
>> With balloon APRS I assume the beaconing rate is probably set to once<br>
>> every 5 minutes - for two reasons - to reduce channel congestion and to<br>
>> preserve battery life. PIC and Arduino type controllers can be put to<br>
>> sleep for 4.5 minutes to reduce battery drain to almost nothing - then<br>
>> woken up to collect the GPS and other data and then used to transmit a<br>
>> packet - then put to sleep again. Correct ? Any other smarts involved ?<br>
>><br>
>><br>
>><br>
>> Thanks, Jamie - VK2YCJ<br>
>><br>
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