Jim Thomson wrote:
> We just went through a big wind storm all last night [ thursday night/fri
> morning]. The commercial AC power flickered and dimmed
> a few times. It eventually died for 2 hrs.
> Correct ...I have an LM70 ...IT's AC is powered from a Water Well house..some
> 100 feet away...(Yes we still have 3' X 60' dug water wells in Georgia ..)
> ... in the tower AC line I have a 1kW UPS supply I picked up on Ebay "cheap";
> put new batteries it .... The UPS was rated at 1000 watts for 10 minutes
> ...... Under test it brought the tower down with no problem ... then I took
> the tower 1/2 the way up and down again..... No Problem
> Ok, what happens with the HDX-689... when it's fully extended, and els all
> broadside to the wind.. and power goes off ??
> Can these things be brought down manually .. safely.... by another method
> ?? [ hand winch, cordless drill, etc]
> I'm seriously thinking of installing a wireless wind speed indicator on top
> of the new tower.
> I can just see myself in the basement, with headphones on, totally oblivious
> to the wind outside. The usual deal is, when winds hit 35-50 mph,
> trees come down across the power lines by the nearby park... and there
> goes the power for 2-4 hrs. Meanwhile the storm has not hit it's peak
> Local wx forecasts are usually accurate.. when they predict lousy wx.
> Plan B was either add UPS power.. or a gen set. I don't have a clue
> what the start up current on the 1 hp motor is.. when retracting a HDX-689.
> It has positive pull down featrure, but it's still gravity that's doing
> most of the work. A UPS that could provide 120 vac @ 20A CCS for 4
> might work. Starting a gen set at 3 AM... in the middle of winter... in
> the middle of a wind storm is no fun either...esp if it doesn't start.
> IF the local forecast is predicting 'high winds after midnight, 110 kmh'
> then at least I have some advance notice... and either don't crank it up,
> or only crank it up part way, etc.
> What does everybody else do ?? This install will have a lot of weight
> on top.. and 4 x ants, and 2" OD x 3/8" chromolly mast.
> Later.... Jim VE7RF
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