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[VHFcontesting] HamIM = APRS supporting VHF Contests

To: VHF Contesting eMail Remailer <vhfcontesting@contesting.com>
Subject: [VHFcontesting] HamIM = APRS supporting VHF Contests
From: Ev Tupis <w2ev@yahoo.com>
Date: Fri, 2 Mar 2007 02:52:56 -0800 (PST)
List-post: <mailto:vhfcontesting@contesting.com>
The strategy of using APRS in support of VHF contesting is both real and 
solidly supported by the ARRL.

When APRS is configured to run in this way, it is called "HamIM" (so as to 
differentiate it from APRS which is *not* legally applicable to contesting due 
to the use of "assistance" in the form of digipeating and Internet gateways).

To be *most* successful you *must*:
1. Reconfigure your APRS software in accordance with the instructions found at 
http://www3.qth.com/~isisocom/propnet/HamIM/HamIM.html
2. Operate on a unique frequency (147.585 MHz has been used in the past)
3. Maximize one station for FM success
   a. Vertical *omnidirectional* antenna with *gain*
   b. High power amp with preamp (many ran 160 watt brick amps)
   c. Use Kantronics TNC (with the ability to operate "open squelch")

Over the years, I've answered lots of questions that start with the phrase 
"Yeah, but what about..." (or it's variations) and go on to ask rules-based 
questions.  Those questions should go to the event sponsors, rather than to me.

On the other hand, in 2002 (when the strategy was first floated...and it was 
called "BEACONet" due to the fact that Rovers can be setup to "beacon" their 
location for others to track) -- the ARRL ruled that it is *fine* to use for 
their events.  See the statement to that effect in the above hyperlink.

Lastly, don't be confused by the link URL above.  The HamIM information is 
co-hosted on the PropNET website.


Ev, W2EV


 
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