Re: PI TNC - progress report.


John G8BPQ
 

I wasn't really thinking of direct user access. More a well sited dual (or more) port node, with normal user acess port(s), and a link back to a base site, using directional antennas if necessary I'd expect a range of several miles - I've seen reports of these things being used in high altitude baloons, implying a line of sight range of several miles.with wire antennas.
 
73, John
 

From: Raspberry_Pi_4-Ham_RADIO@... [mailto:Raspberry_Pi_4-Ham_RADIO@...] On Behalf Of sierrapermaculture
Sent: 21 September 2012 01:11
To: Raspberry_Pi_4-Ham_RADIO@...
Subject: [Raspberry_Pi_4-Ham_RADIO] Re: PI TNC - progress report.

 

Just curious, but how could such low-power transceivers be of any practical use for packet? Wouldn't the RF footprint be so limited that hardly anyone in the neighborhood would be able to use it? Am I missing something here... or is the plan to use an amplifier for wider coverage?

Paul


--- In Raspberry_Pi_4-Ham_RADIO@..., Bill Vodall wrote:

> > These are tiny 100 mW 434MHz data tranceivers - see
> > http://www.sparkfun.com/datasheets/Wireless/General/RFM22B.pdf. I plan to do
> > a version of the TNC using this module.
>
> How about the RFM12BP for a bit more punch?
>
> https://www.argentdata.com/catalog/product_info.php?products_id=157

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