Thats typical guying also for broadcast+military towers in Germany 73 Peter _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weat
installations. one reason might be that the towers over here are much higher strength and don´t tend to buckle under higher downtension. But thats one reason for being more expensive as well 73
The best approach is to use slewing bearings at the bottom of the tower. This freestanding, 40m high, rotatable tower of a fellow ham with stacked long boom quads works flawless for more the 20 years
Hi Jerry, The big quad weights about 1,5 tons, even there is a special made gin pole at the site to get it up and down, first that gin pole has to be mounted and for that business a smaller gin pole
No, a tiny little beam ;-)) 73 Peter Quad? _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists
I will certainly avoid srew in anchors in the future. It just happened to me that my tower collapsed after 6 hours of continious heavy rain folled by a storm at 70 miles/hr and a pulled out anchor ww
They are about 1,60m long with 20cm blade diameter 73 Peter Of some interest to the list might be the size of your anchors? Jim, W6RMK _______________________________________________ ________________
I would not use such a small rotating pipe with an antenna that size, not even with a short mast. With that length I would use at least 4 inch or more. I use a KLM logperiodic with a 36´boom on
I learned it twice that worm-gear drive rotators also loose their gears. Two of my Prosistel PST2051 failed with a beam of 0,9m² at 10m height and only 60km/h wind gusts at that time. The worm a
The best is to use flanged masts and a double-worm gearbox. I never had any problems with that configuration, even not at 200km/h: http://www.pbase.com/df3kv/image/50045855 http://www.pbase.com/df3kv
it certainly is , similar happend a few years ago when Optibeams name was taken over by Titanex. alfaspid.com: Administrative Contact: QTH.com Scott Neader (neader@qth.com) seems to be no nice guy...
I can tell you my experience. I own 4x PST2051, two of them failed mechanically after very short use. One was used to turn a 5-element 20m KLM 12m above ground, the rotator inside the tower with 4m o
Hi Hamad, you will most likely not install both beams at one level. When one will be stacked above the other you cannot just add the wind loads. The upper one puts much more bending force on the towe
Of course it must be guyed at the top and probably above the centre to prevent buckling. I was not talking about guying the bottom section which would be useless. Is there any reason for that particu
I use standard 1/2" hardline around the rotators for more then 20 years without any problem or cable break. The cables are formed into a one layer spring like that in a mechanical clock. My rotators
Jos, I used a brand new GS-065 bearing on top of a small tower to hold the 6m long steel mast and a 5-element 20m yagi at 12m, I used the rotator sitting at the 6m level for rotation only. Weight of
Our regulation EN 361 says if you connect the fall arrest lanyard above and in front of you the front D ring must be used, that certainly applies to tower work. The back D ring must used if the lanya
Hi Bill, My dipoles on all three low bands are at 100 feet. The only band where dx is great with the dipole is 40m. On 80m the dipole usually is same strength as the vertical to the US East cost, to
I would have to pay 3500 US$ here for one to be used with my 150 foot tower 73 Peter, DF3KV We have several different kinds where I work. The big, bad boys have 150' of steel cable and a handle to re
I just recently dismounted and moved a NDB from its old place on the airfield some km out to a new location on a hill. The airfield is a military helicopter base and they just got a new type with a d