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[aprssig] [These] Mobile Digipeating

Stephen H. Smith wa8lmf2 at aol.com
Wed Sep 21 04:13:58 UTC 2011


On 9/20/2011 11:15 PM, David Nichols wrote:
>
> Is anyone aware of plans to integrate a gps into a mobile transceiver (Yaesu 
> or Kenwwod) in the not too distant future?.
>

1)     You can already get handhelds from Kenwood and Yaesu with integrated GPS 
units.  There would not be much point in integrating a GPS into a mobile, since 
the radio chassis most likely would not have a clear view of the sky from 
inside the vehicle.

If you use an external GPS antenna, it will need to have an built-in preamp to 
offset the horrendous coax loss at 1575 MHz where GPS operates.      If you are 
going to have an external unit anyway, you might as well avoid the coax loss 
and need for a preamp by using the faceless hockeypuck-type GPS devices.  Units 
like the Garmin GPS-18, and the ones sold by Argent Data and Byonics, combine 
the antenna and entire GPS receiver into one unit -- 5 VDC in/serial GPS data 
out to a port on the radio.


2)    Trim your email responses!!!   You had FIVE previous posts quoted in your 
posting!

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