Category Archives: Antennas

Articles about Antennas, Feedlines, Towers and related equipment. Fixed, Portable and Mobile Antenna Articles are included.

Tower Climbing Demo and Open House at AB1OC/AB1QB

Several folks have suggested that it would be interesting to see a tower climbing demonstration. It turns out that we need to climb our tower to do some routine maintenance before winter comes. This seems like a good opportunity for folks who are interested in learning how to climb a tower and work on it safely.

A View From Our Tower
A View From Our Tower as Anita, AB1QB Looks On

Ever wonder what’s involved in safely climbing and working on an Amateur Radio tower? Here’s your chance. On Sunday, October 15th at 1 pm we will be holding an open house and tower climbing demonstration at our station.

Climbing Safety Gear
Climbing Safety Gear

We have two sets of climbing safety gear and we’ll provide the opportunity for those who want to try it on to do so. I am going to climb our tower to the 45-foot level to do some maintenance on our weather station. Anita and I will be explaining how to safely climb and work on an Amateur Radio tower.

Invitation to Operate Our Station

AB1OC-AB1QB Shack
AB1OC-AB1QB Shack

We will also provide an opportunity for folks to get on the air at our station and make some contacts as part of our open house. Our station will be configured for you to try SSB Phone, CW, and digital modes including the new FT8 mode. You can try any or all of these modes. We’ll be QRV on all bands from 160m – 70 cm. Power levels will be from QRP up to the legal limit.

We hope that our club members and friends will join us for our open house. It should be fun!

Fred, AB1OC

A “Tech Night” To Remember – Our Visit To KC1XX

Our August “Tech Night” featured a Saturday visit to the Matt Strelow, KC1XX’s superstation. Matt’s station sits on top of a mountain in Mason, NH.

KC1XX QTH
Matt Strelow, KC1XX’s QTH

Our visit began with a tour of Matt’s antenna farm. Matt has a total of 13 towers and each one has a unique story and purpose.

300 ft Tower at KC1XX
300 ft Tower at KC1XX

Matt’s tallest tower is used for 80m as well as other bands. It is painted red and white and has a light on top!

Antennas and Towers 5
Base of Rotating Tower at KC1XX

Several of Matt’s towers are rotating ones with some serious tower turning hardware at the base.

Antennas and Towers 2
Rotating Tower Guy Rigging

Rotating towers use a special type of guy attachment ring which allows the tower to turn while being supported via guy wires.

Coax Feedlines
Coax Feed Lines at KC1XX

Matt has built an extensive infrastructure which supports all of the antennas at his QTH. The picture above is a small building where all of the feed lines from Matt’s antennas enter his station.

Dennis, K1LGQ Operating at KC1XX
Dennis, K1LGQ Operating at KC1XX

After the tour of the antenna farm, we saw the KC1XX “shack”. Several of us had a chance to operate Matt’s station. How’s this for QRP Dennis?

Abby, AB1BY Operating at KC1XX
Abby, AB1BY Operating at KC1XX

Abby wasted no time in building her usual pile up. It easy to see why KC1XX has a pile up whenever they are on the air after just a short time spent operating from there.

After a great day of fun and lots of picture taking, See the gallery above for more pictures. Matt treated us to refreshments and some more conversation about his Amateur Radio experiences.

Nashua Area Radio Club "Tech Night" Group
Nashua Area Radio Club “Tech Night” Group

All of the members who made this memorable “Tech Night” had a great time and we’d all like to thank Matt for his gracious hospitality. We learned a lot!

Fred, AB1OC

How did I hang my dipole 50+ feet high in the trees?

Dipole Antenna Tree

I wanted to make an article that would explain to anyone who visits my home or QTH that would answer the question on “How did you get that rope so high in the trees and how did you get that rope over the perfect branch?

I started out with a fishing pole and a 4-inch long stick from the woods.  After a few attempts of getting the stick up and over the tree with the fishing line it finally made it over the tree and back to the ground.  I then reeled in all the fishing line while pulling a string over the tree.  After the string, I used it to pull over 3/8” poly rope.

I came up with the following idea to get a rope over the perfect branch.

Dipole Antenna Tree

The 3/8″ line holds an old branch from the woods in the center. The yellow rope to the left is the “control line” and the right side has a half rotten log as a weight secured with a slip knot as shown below.

Dipole Antenna Tree

In the diagram below the light blue line represents the yellow control line from the photo.  As you lift the whole unit you should consider that the weight of the control line may offset your balance as you go higher.    The magenta line shows the string with a slip knot.  When the half rotten log made it over the desired perfect branch by combinations of pulling the 3/8″ rope at either end (shown black) and/or the control line (shown light blue) I pulled out the slip knot and the half rotten log fell over the perfect branch along with the string (shown magenta).

Dipole Antenna Tree

I replaced the string with rope and then a wire rope loop (shown red). The wire rope will not fade and fall apart from the sun’s UV rays. The yellow circle represents a pulley for the poly rope that holds up the dipole. When the poly rope breaks down from UV, wear and tear it can easily be replaced by lowering the pulley.  I added weight to maintain proper tension on the dipole antenna as shown below.

Dipole Antenna Tree

In theory, the tension will remain the same even in wind storms when the trees swing back and forth. It turns out that an old cast iron rotor from my Toyota was the perfect weight for the application!

73,

Mike AB1YK

 

 

 

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