| Height and weight of the system |
Tower height: 100 m (330 ft)
80m beam: 90 m (300 ft)
160m beam: 80 m (270 ft)
Total weight: 39.600 kg (80 000 lbs)
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| Elements, gain and take off angles |
160m: 3 elements, 12.9dBi, 26°
80m: 5 elements, 15.7dBi, 12°
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| Front to Back ratio |
160m: 20-30 dB
80m: 20 dB
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| Operating frequencies |
1810-1845, 1845-1880 kHz (SWR < 1.6)
3500-3560 kHz (Lmatch)
3700-3800 kHz (50 ohm / current balun)
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| 160 m elements |
Weight 1600 kg, (3800 lbs), each
Length 59 m (190 ft), all elements 12m (36ft) capacitive hats
Each use 700 m (2100 ft) of tubing
Tuned with 06 μH coils at the center
Relay switches for turning the ant 180°
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| 80 m elements |
Length 46 m (140 ft), longest
10 m from the 160 m antenna
max. windload, 70 m/s
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| Boom dimensions |
160m length 71 m (215 ft)
80m length 60 m (200 ft)
The triangular 160m boom (2.2 m, 7.3 ft) comes with a rail for walking inside it
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Mammoth’s vertical behaviour on 160 meters
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| Turning gear |
Weight 2000 kg (6000 lbs)
11 kW motor
Inverter driven softstart/stop
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| Largest guy ring bearing |
Weigth 3300 kg
50 mm (2”) diameter balls in the bearing arrangement
Ring diameter 3,8m (13 ft)
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| Guy wires |
Total length 2300 m (6900 ft)
Phillystran/element guys 1150 m (3450 ft)
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| Final touch |
600 litres (120 gallons) of paint
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| Mechanical design and project Management |
Tuomo Halminen, HALTA OY
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| Antenna design |
Pekka, OH1TV, 160 m
Olavi, OH5BR, 80 m
Lauri, OH8LK, switching systems
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| Arcala team members busy at the project |
Juha, OH8NC
Veijo, OH6KN
Martti, OH2BH
Toni, OH2UA
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| Group working on the project of their lifetime |
Toke, OH6RM
Pekka, OH7RM
Markku, OH8SR
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| The construction is capable of handling ICE and SNOW for its own weight. In an ice storm? God Bless Radio Arcala! |
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Quelle: http://www.radioarcala.com/
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