Currently viewing the tag: "The King"

Today the winds finally settled and in between freezing rainshowers I decided to hoist up the  60 pound insulators and antenna wires for the King´s antenna.

The antenna wires are #8 CopperWeld – copper covered steel wires with a breaking strength of 2500lbs / 1100kg.

My good neighbor, Finnbjörn from Litlaeyri, Airport Manager, came to assist me on the ground and he took these photos on my camera.

I began by pulling up the right hand side insulator and antenna wires while still on the ground.   I then attached a climbing rope to my harness and the other end to the left hand insulator and antenna wires already assembled on the platform.

Attaching the right hand side insulator went well, but the climbing rope attached to the other insulator managed to wind itself around the feedpoint box at the bottom of the pole.

Finnbjörn came to the rescue and untangled the rope, saving me a trip to the platform and back up again.

It  was extremely difficult to attach the second insulator until I discovered that one of the antenna wires had snagged on the platform.  Finnbjörn also saved me a trip back down by untangling the wire.

This was the most difficult part of constructing this antenna and I am glad it is behind me.  I must be getting old :-)

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I had previously ordered a line isolator or a 1:1 balun from ArraySolutions in the belief that it was the best available.
I learned that Balun Designs LLC were making a similar item with even greater isolation.

An inquiry to ArraySolutions by email asking them to provide me with test data on the isolation impedance of the choke resulted in no reply.

I am disappointed by this, I expected more from ArraySolutions.

The same question posed to Balun Designs resulted in an answer within minutes – On 160 meters the choking impedance is 1536 ohms at 1.8 MHz.

I purchased the Max choking model along with a 1:2 UNUN (25 to 50 ohms) both of which are obviously of high quality.

I have since learned that the impedance of the King´s antenna will be close to 15 ohms, so I should have ordered the 1:4 UNUN but not to worry, I will be building other antennas later and will find a use for it.

Balun Designs

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Building the guy wires for the King and the Rooks is difficult and time consuming.   I have now spent a few days on this task.

Most of the guy wires are made of 5/16″ galvanized EHS steel cable.

Guy wires broken up with insulators every two meters were installed on the King today.
During the operation, I used the backhoe to hold the King steady while the temporary guy wires were replaced with the new guy wires.
The final tightening of the guy wires will be done tomorrow.
Some of the photos were taken with my camera by my neighbor, Finnbjörn from Litlaeyri who dropped by during the work.

I made a trip to Reykjavik recently to acquire more coax cable for the King and future needs. I rented a small crawling excavator and in two days of work, I dug up 500 meters of 1-5/8″ Heliax cable from the ground.

The work was made easier due to the professional installation whereby the cable was surrounded by fine sand. This enabled me to retrieve the cable without damage…

The photos below show the cable on it´s way towards the King.

I was not quite satisfied with assembly of the 1-5/8″ Heliax splice so I did some research on the web. I did not find the exact assembly instructions, but it became clear that for the assembly of almost all Heliax connectors, it is assumed that the cable is cut at the crest and not at the trough.

I therefore disassembled the splice connector and reassembled it.
This time assembly felt much better and I was able to tighten the connector to my satisfaction.

On the advice of TF3DX, I decided not to tape the connector in an attempt of waterproofing, but rather simply cover it to protect it from the elements and allow the connection to breathe.

I used two plastic bottles with drain holes at the bottom to accomplish this.

The splice was then raised from the ground as can be seen in the photos.

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