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-   -   Four Mile Fire HAM Activity (http://www.risingsun4x4club.org/forum2/showthread.php?t=13971)

Inukshuk 09-08-2010 11:50 PM

Four Mile Fire HAM Activity
 
4 Attachment(s)
HAMS are assisting with the Four Mile Fire on a repeater at 146.760. I ran into a mobile spotting station at Flagstaff Park. After verifying I was a HAM, they became super friendly and gave me this frequency. The guy in the background was in a Sheriff's Uniform (under the poncho - nobody minded the rain!). I then monitored 146.760. I heard several stations report locations and observations. After official duty time ended there was chit chat and they were plainly asking from more volunteers. I have no idea who to contact but maybe one of you does, or someone could reach out on 146.760.

The second device looked to be a temporary repeater on top of Sugarloaf Mountain. It would have also been a great observation spot, but was unstaffed.

DaveInDenver 09-09-2010 09:38 AM

The orange box belongs to the National Incident Radio Support Cache (NIRSC). It's a relay station that the NICC owns and local incident commanders can order. It's a repeater for the USFS firefighters.

http://www.nifc.gov/nicc/index.htm
http://wiki.radioreference.com/index..._Support_Cache

When you think about wildland fires, they are usually in remote places and geographically difficult places (lots of valleys and large areas for example). So for the fire commanders to keep all their people in touch repeaters are exactly what is needed.

The reason you see a yagi on that one is the commander base is probably fixed and that is aimed towards it. There is vertical antenna on the top with four ground radials. That looks to be probably a 2m system. What I'm not clear about is how it's powered and recharged. My guess is someone hikes up there periodically and swaps a battery. Or there might be solar panels sitting some place else?

This is the sort of thing on a smaller scale that was proposed for Cruise Moab, a temporary portable repeater. It's for an unexpected need like this why people like Groucho, Seldom Seen and I are obsessed with tinkering with antennas and radios and batteries and portable and mobile operations. That geeky PVC pipe and THHN wire rat's nest in my garage is a hasty 20/40/80 inverted 'V' type NVIS antenna that I can fit in my truck. No need for grid power and infrastructure to talk within about a 500 mile radius. I tinker with talking to AMSAT satellites and SOTA because being able to track and communicate with a MEO microsat using a 7-element beam and 5W HT sure hones your skills at low power, very portable operations...

DaveInDenver 09-09-2010 09:47 AM

NIRSC frequencies.

Tactical
Frequency Type Description
168.050 M Tactical 1
168.200 M Tactical 2
168.600 M Tactical 3
164.1375 M Tactical 4
166.725 M Tactical 5
166.775 M Tactical 6
168.250 M Tactical 7

Command
Frequency Type Description
168.700 RM Command 1
168.100 RM Command 2
168.075 RM Command 3
166.6125 RM Command 4
167.100 RM Command 5
168.475 RM Command 6
162.9625 RM Command 7

Logistics
Frequency Type Description
414.650 RM Logistics 1
415.400 RM Logistics 2
415.500 RM Logistics 3
417.300 RM Logistics 4
417.350 RM Logistics 5
417.500 RM Logistics 6
417.800 RM Logistics 7

Inukshuk 09-09-2010 10:49 AM

Quote:

Originally Posted by DaveInDenver (Post 161669)
What I'm not clear about is how it's powered and recharged. My guess is someone hikes up there periodically and swaps a battery. Or there might be solar panels sitting some place else?

Everything was in the orange box. No solar panels so they must just swap batteries. There is a road to the top of Sugarloaf Mtn., normally chained off, but the chain was down and there were fresh ATV tracks.

In addition to being prepared, this is a good reason to have explored all the back roads.

The two guys I spoke to in Flagstaff Mt. Park were volunteer HAM spotters operating on 146.760.

Seldom Seen 09-09-2010 12:33 PM

Quote:

Originally Posted by Inukshuk (Post 161688)
...
The two guys I spoke to in Flagstaff Mt. Park were volunteer HAM spotters operating on 146.760.

Boulder County AERS


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