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The vertical lines to mark the
terminal bolts should be 60
apart. The 60 degrees can be
marked from the lines on the
baseplate before the flange is
attached. The post should be
about 46-48 inches above the
baseplate with about 6-8
inches below.
terminal bolts should be 60
apart. The 60 degrees can be
marked from the lines on the
baseplate before the flange is
attached. The post should be
about 46-48 inches above the
baseplate with about 6-8
inches below.
Mark the center post for the
wire terminals based on the
measurements on the Position
of Wires Table on the
Specifications Page. The
measurements are above the
baseplate; not the top of the
flange.
Drill two holes for the driver
wires for each band on the 60
degree marks. You will be
using #10-24 X 3/4 bolts. The
bit size should be 3/16 inch.
wire terminals based on the
measurements on the Position
of Wires Table on the
Specifications Page. The
measurements are above the
baseplate; not the top of the
flange.
Drill two holes for the driver
wires for each band on the 60
degree marks. You will be
using #10-24 X 3/4 bolts. The
bit size should be 3/16 inch.
When you stick the bolt down
inside the post with this wire,
push it through a terminal
hole, hold it in place with your
other hand and then push the
wire in further to disengage it
from the bolt. Put a nut on the
bolt it to hold it. This is a lot
easier than it would seem.
inside the post with this wire,
push it through a terminal
hole, hold it in place with your
other hand and then push the
wire in further to disengage it
from the bolt. Put a nut on the
bolt it to hold it. This is a lot
easier than it would seem.
I did all five bands in less than
20 minutes. Put a split lock
washer, then a nut on each.
Hold the screw with needle
nose pliers while tightening the
nut.
20 minutes. Put a split lock
washer, then a nut on each.
Hold the screw with needle
nose pliers while tightening the
nut.
Use a piece of stiff wire (coat
hanger) with a loop as shown
to fish each bolt down the
inside of the center post. The
bolts are #10-24 X3/4 stainless
steel with a small lock washer
on each. The other nuts are
shown here and there will also
be a couple flat washers used
when the wires are attached.
hanger) with a loop as shown
to fish each bolt down the
inside of the center post. The
bolts are #10-24 X3/4 stainless
steel with a small lock washer
on each. The other nuts are
shown here and there will also
be a couple flat washers used
when the wires are attached.
Step Three - Center post
- The center post is 1 1/4 inch O.D. fiber glass tube or 1 inch I.D. PVC five feet long with bolts mounted from the inside used as terminals
for the wires and coax feedline.
- The transmission line itself is 50 ohm coax and should be connected at the top of the post to the terminals for 20 Meters. Modeling has
shown that top feeding is slightly preferable to connecting the feed line at the bottom.
- Each set of driver wires is connected via small pieces of coax as shown below.
- After completing the installation of the feed line components it would be a good idea to do an ohm meter check to make sure there are
no short circuits of coax braid to the inside wire.
Here is schematically what you
will be doing with the terminals
on the center post.
will be doing with the terminals
on the center post.
Make coax pieces for
connection between the
center post driver terminals
using #12-#10 ring terminals.
You will need to measure
between the terminals for each
piece to ensure that it fits.
connection between the
center post driver terminals
using #12-#10 ring terminals.
You will need to measure
between the terminals for each
piece to ensure that it fits.
Solder the lugs onto the coax.
The utility lighter is a great
tool for this. I like it better than
the soldering iron-- no wires.
If you are not going to be
running more than 500 watts of
transmitter power output, you
can use RG 58 coax instead of
RG 213 and it is much easier
to work with.
The utility lighter is a great
tool for this. I like it better than
the soldering iron-- no wires.
If you are not going to be
running more than 500 watts of
transmitter power output, you
can use RG 58 coax instead of
RG 213 and it is much easier
to work with.
Apply liquid tape generously to
all exposed coax braid to
prevent moisture from getting
in.
all exposed coax braid to
prevent moisture from getting
in.
Install the coax pieces
between the terminals. Also
install the coax piece from the
top as shown here down the
side of the post and through
the hole in the base plate. This
photo was taken after the driver
wires and radial cords were
installed.
Use stainless hardware. Lock
washers will help keep the
connections tight as the wind
tries to loosen everything.
between the terminals. Also
install the coax piece from the
top as shown here down the
side of the post and through
the hole in the base plate. This
photo was taken after the driver
wires and radial cords were
installed.
Use stainless hardware. Lock
washers will help keep the
connections tight as the wind
tries to loosen everything.
