[OZAPRS] HF APRS Mobile

[Darryl Smith]

A long wire would be good if you can get enough helium balloons, and get
them neutrally buoyant, following your car like a giant tail. Actually,
scrub that... A long Wire would be too directional. 

Therefore it would probably be best for a vertical like Ben suggested. The
only issue is the design. Given that you are mobile, you cannot really use
a
design where you have a virtual reflected earth, since the tires on the
car
will provide an insulating capacitive barrier between the antenna and
ground. And the car body is probably not the best for a virtual ground. 

Sounds like you should model your car in MiniNec, and play. 

[For those who do not know, MiniNec allows you to model antennas on your
computer. The ARRL has a training course, and a text book on Antenna
modeling. Well worth it, in my opinion.]

Darryl

-----Original Message-----
From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
Behalf Of Ben Lindner
Sent: Tuesday, 3 April 2007 8:08 AM
To: vk4tec at tech-software.net; VK / ZL APRS Users
Subject: Re: [OZAPRS] HF APRS Mobile

A vertical would be best. If you use a beam you may have trouble with 
the law and a few safety concerns

Andrew Rich wrote:
> What can I use for an antenna for 10 MHz APRS mobile ?
>
> Suggestions 
> -----------------------------------------
> Andrew Rich
> Amateur radio callsign VK4TEC
> email: vk4tec at tech-software.net
> web: http://www.tech-software.net
> Brisbane AUSTRALIA 
>
> _______________________________________________
> Ozaprs mailing list
> Ozaprs at aprs.net.au
> http://aprs.net.au/mailman/listinfo/ozaprs
>
>
>
>   
_______________________________________________
Ozaprs mailing list
Ozaprs at aprs.net.au
http://aprs.net.au/mailman/listinfo/ozaprs

_______________________________________________
Ozaprs mailing list
Ozaprs at aprs.net.au
http://aprs.net.au/mailman/listinfo/ozaprs
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://second.aprs.net.au/pipermail/ozaprs/attachments/20070403/8be668f0/attachment.htm