Typhoon Milenyo - September 2006
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Were you
prepared for the long blackout which occurred during and after Typhoon Milenyo
struck? There is no excuse for not knowing the possible consequences as this has
happened many times in the past. People do tend to forget. The last time a
strong typhoon struck Metro Manila directly was in 1995 so perhaps there is some
excuse. Other provinces have had more frequent typhoon strikes and Bicol was
particularly badly hit this time. |
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PAGASA gave frequent warnings on their website and these warnings were also displayed on our PARA website starting about three days before the typhoon hit. The PAGASA information is shown on the PARA news page with a note on the main page directing viewers to the information. Unfortunately the updating can be disrupted because of power outages! The information from PAGASA is updated 4 times a day, at 5am, 11am, 5pm and 11pm. There are also other websites which show satellite pictures on an hourly basis and these pictures can be combined to make an interesting movie showing the actual track of the storm.
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How did your radio station fare in the midst of all this? As Filipinos we should all be aware and prepared for the ravages of typhoons every rainy season, but how many of us really are? What do we need to maintain our ham stations on the air in case we are needed to provide emergency communications?
Power supplies are, of course, a priority as without power our ham radios are
just useless. For those without generators, 12v batteries are the norm. You
should ensure all your standby batteries are fully charged before any
possibility of blackout conditions arises. Keep an ample supply of low voltage
batteries for flashlights and make sure emergency lights are fully charged. Be
aware that the sealed cells in those lights might not be fully up to spec if the
light is more than a year or so old so check the battery capacity by seeing how
long it takes to discharge when normal conditions prevail. Spare batteries for
these lights are readily available and you should have spares for the actual
lamps themselves, whether they are fluorescent type or incandescent bulbs.
Solar cells, though expensive at present, are very useful for recharging
batteries of all kinds. Even sunlight diffused through clouds will give an
adequate charging current to keep your battery life extended. Cellular phones are ubiquitous these days. Do you have a spare battery for yours? Most people don't expect brownouts to last very long, a few hours at most, but can you cope with loss of power for a few days? Your cell phone battery will be long dead before the power comes back unless you have some means of recharging it or you have kept a spare battery fully charged. In extreme cases, people have been saved by the use of cell phones when they have been trapped in collapsed buildings. We must not forget our antennas. Did yours survive Milenyo's fury? Most HF Yagis are designed to withstand high winds but perhaps your mounting hardware or tower is not as generously rated. What use is your antenna if it is lying on the ground crushed beneath the collapsed tower? Check all your guy ropes and wires to make sure they are fit for the job. Polypropylene ropes can be damaged by sunlight and snap at low tension. Make sure your fixings are in good condition before the onset of the rainy season each year. Check all the bolts and clamps on the antenna system for corrosion or failure. Stainless fittings are good but you should check regularly that all the nuts are tight. If your tower is telescopic then so much the better as you should lower the antennas to a safer height and tie them down securely to avoid too much flapping of the elements.
If your antenna is supported by trees, for example a wire dipole held up between
coconut trees, make sure the fixing ropes have enough flexure in them to avoid
being snapped when the trees bend during high winds. Ropes with counterweights
on pulleys are ideal when lots of flexing of trees is expected. Ensure the
feeder cables do not flap about excessively. |
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The internet is a good resource also but less reliable as modems will need
alternate power supplies and phone lines may be down. |
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How did your station survive? Do you have any stories from the dark days after
Milenyo, or pictures of your mangled antennas which could be an object lesson
for others? Do send them in to us and we will publish them. |
Good luck in the next storm, there will always be another one!
George
DU1GM
Philippine Amateur Radio Association, Inc. 2006-2008