Thanks Patrick,
Even considering the load halving of the pulleys, it seems like at best it
would be on the or above sane operating parms. BTW I had a hard root beer the
other day. Pretty tasty!
The tower isn't up yet, so the first trial would be raising it. The battery
charger is a good idea, and I thought of one of those starter packs, but
haven't looked at specs yet.
A better idea may be an AC powered winch.
Mike NF4L
On Feb 3, 2014, at 9:08 AM, Patrick Greenlee <patrick_g@windstream.net> wrote:
> I think you will be greatly disappointed trying to run that winch with a 20
> amp supply. If you insist on trying, consider that it is better to
> experiment by trying to lift the tower than to lower it. If the winch were
> used to lower the load via its "power out" capability you might get the tower
> down and then find you can't raise it back up. Those winches are notorious
> current hogs and as you may have noted by the duty cycle specs, are rated at
> the edge of or past the envelope. I hope you are successful and safe in your
> efforts. If it works just fine lifting the tower on a 20 amp supply with no
> other assistance then I owe you a Root Beer float the next time we are
> together.
>
> The brush type DC motor in that puppy doesn't care about good filtering or
> precise voltage control. If you can come by a good used xformer that will put
> out 12 to 18 volts at 50 amps then slap on a full wave diode bridge rated for
> maybe e about 100 amps (put it on a heat sink) and you are ready to go.
> Alternatively find a 24 to 30 volt xformer with a center tap and put on a two
> diode bridge with cooling for the bridge and go for it. A slow blow fuse or
> thermal breaker rated at or above the max current in normal use would be a
> good idea too. Another possibility is a heavy duty battery charger,
> typically on wheels and will have a start position that sources serious amps,
> well above the normal charge rates. These are duty cycle limited so choose
> wisely "grasshopper" and consider adding a fan to lengthen the duty cycle. I
> have seen working used units go for under $50. Check the specs on the Harbor
> Freight u nit. It might just make the cut. Consider you will have a terrif
ic battery charger/jump starter as well as a winch power supply.
>
> 73 and best of luck,
>
> Patrick NJ5G
>
> -----Original Message----- From: Mike Reublin NF4L
> Sent: Monday, February 03, 2014 6:46 AM
> To: towertalk reflector
> Subject: [TowerTalk] HF winch
>
> I picked up a 2500 lb. rated 12V. winch from Harbor Freight intending to use
> it for tilting my HG-70HD tower. Weight with antennae and rotor etc. is
> between 1200 and 1300 lbs. I was hoping to run it from a 20A power supply.
>
> I plan on a pulley arrangement that will give me a 2:1 advantage. I could go
> to 3:1.
>
> If I read the specs right, the winch draws 55 amps when the load is 1000 lbs.
> The duty cycle is 45 seconds on, 14 MINUTES off. Mounting is 2 bolts,
> M8-1.25x35 mm.
>
> Seems a tad sketchy. Your opinion?
>
> 73, Mike NF4L
> _______________________________________________
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