Antenna Conductor Details

[Marcus]

Are you able to provide the following antenna-related information, please?

1) What is the diameter and conductor (e.g. copper, steel, etc.) of the top-loading wires?

2) Are the top-loading wires at 127 m or is that the top of the support mast and the top-loading wires are slightly lower?

3) How much do the top-loading catenary wires sag by? Or what is the height of the top-loading wires half-way between each mast?

4) What is the diameter of the cage of wires that form the near-vertical radiators? Also, what is the conductor (e.g. copper, steel, etc.)?

Thanks in advance,

Marcus

Topic

[Marcus]

Dear Fredrik

Thank you very much for the clear information.

Best regards

Marcus

[Marcus]

Dear Fredrik

Thank you for responding and apologies for asking further.

Regarding the phosphor bronze top-loading wires, is the diameter 72.5 mm? Was it a typo with 7×2.5mm? The top loading wires are visible on photos showing all the masts, which makes me think they have a wider diameter.

Also, the vertical radiator going up from the inductors on towers 2-5 appear to be a cage of six or eight wires in photos. What is the diameter of the cage of wires? I assume they are also phosphor bronze?

Thanks once again.

Marcus

[AlexanderSAQ]

Dear Marcus,
The antenna top distribution net is made from 8 pcs 7×2.5mm phosphor bronze wires. The 8 wires are mounted on isolators, hanging down from the top support structure. The sag between each tower is approx. 17m, depending on the temperature.
At each tower, there is a tuning coil, made from litz wire, 1.8m in height and 2.7m in diameter. On tower 1 and 6 the coil is located were the top network is going up/comming down. On tower 2-5 the tuning coil is connected to a near-vertical lead, connected to the top distribution net.

Fredrik/AlexanderSAQ

[AlexanderSAQ]

Dear Marcus,
A phosphor bronze wire consists of 7 strands, each 2.5mm in diameter, twisted into a helix, forming a rope.
The vertical radiator in tower 2-5 is made from six thinner phosphor bronze wires, see image https://commons.wikimedia.org/w/index.php?curid=1296820, separated by a metal ring, 250mm in diameter.

Fredrik/AlexanderSAQ

• This reply was modified 2 years ago by AlexanderSAQ.

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