[AMRadio] Tower advice
Dave Mayfield W9WRL
wrl at gwltd.com
Wed Mar 11 13:12:12 EDT 2009
Todd, I have built several towers like your talking about. If you do as
you have said you will not have any troubles. Here is how the base
should be made, keep in mind your soil type has something to do with the
depth of the base. Here in Illinois I would dig the base 20 inches
square and four feet deep. I then drive four 4ft long by 1/2 or lager
rebar straight down in the bottom of the hole drive these three feet
down keeping them apart so that you tower section will set in between
the rebar, then drive a few more 4ft 1/2 rebar sections at a 45 into the
sides of the hole. But about 6 inches of rock in the bottom, this will
allow the water that WILL get into the tower section legs to drain, if
they don't drain the tower legs will split when the water in the legs
freezes. This base will hole a 35ft tower and tribander without any
guys. I have one just like this that stood up to 96 miles per hours
winds at my place last summer. No guys. if you have room for the guys
then you should have one set, two sets is better but one will hold it.
Dave W9WRL.com
Todd Carpenter wrote:
> I have inherited a Mosley tribander with an 18 ft boom. It did not come with a salvagable tower. I have 3 sections of standard TV tower (steel ladder style 3 corner.) I can probably acquire 2 more easily and cheaply. What I would like to do is use one of the 10 ft sections as a base in sufficient concrete for a solid base. The at around 10 ft above ground install a hinge plate to be able to lay the tower over for maintainence. My goal is 35 ft height for the beam with a small extension for a small 2 meter beam and ground plane. I plan to use heavy guy wires on all three sides. Does this seem plausable? Where should I take extra caution? Thanks. Todd
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