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| Reviews Summary for NN4ZZ KARlock |
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Reviews: 2
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Average rating: 5.0/5
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MSRP: $190.00
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Description: The KARlock is an optional locking device for your TiltPlate. If you live in a high wind area or just feel more comfortable with a device to prevent the antenna from lifting in high winds, you may want to consider a KARlock for your Tiltplate.
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More info: http://nn4zz.com/karlock.htm
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write your own review of the NN4ZZ KARlock.
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K3BZ
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Rating: 5/5
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Jan 12, 2009 14:54
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KarLock Completes the TiltPlate !!
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Time owned: 3 to 6 months
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I installed the NN4ZZ TiltPlate on my tilt-over tower for reasons of safety and convenience.... it's a "peace of mind" thing, so I don't have to worry about climbing or the falls that can result. I don't relish the idea of a broken leg or hip or worse to mar the enjoyment of my ham radio hobby. The KarLock is just the "frosting on the cake" to prevent the antenna tipping in high winds...more peace of mind... built with the same over-engineering as the TiltPlate, real solid. I had to wait for those high winds before seeing the KarLock in action, but last week we had 50 mph+ winds here and sure enough, the KarLock worked just as advertised. Glad I've got it.
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K6KAR
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Rating: 5/5
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Nov 11, 2008 18:36
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Outstanding Product
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Time owned: 0 to 3 months
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The KARlock is simple, elegant and "gravity powered." It's made up of only three components: the pivot block, the catch rod, and the catch plate. The pivot block attaches to the moveable TiltPlate. The pivot block is machined from a single block aluminum and attached with set screws. The catch rod is shaped to catch the latch and pull tight when the moveable plate lifts due to high wind. It is cut from 1/2 inch aluminum plate for high strength and low weight. The catch plate is 1/2 in thick aluminum plate. It is secured to the mast using 2 inch (or 2 1/2 inch)DX Engineering U-bolts . A heavy duty stainless steel catch bolt is mounted on the plate. In the normal operational position the catch rod swings freely about 1/4 inch below the catch bolt. When tilting the tower over for maintenance the catch rod pivots clear of the catch bolt well in advance of any movement or separation of the Tiltplates. In the event of high winds, as the moveable plate lifts, the catch rod engages the catch bolt. The lifting motion is stopped. The KARlock doesn't require the user to climb the tower to lock or unlock in normal use. It does not require cables, poles or other attachments to lock or unlock in normal use. The KARlock does not add additional wind load. The design is simple, reliable, and weighs less than 5 pounds. It uses top quality parts consistent with the TiltPlate itself. The KARlock prevents antenna lifting in any wind speed.
Many thanks to Al, NN4ZZ for the creative and masterful engineering that has gone into the KARlock.
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