Luzon Island IOTA: OC-042
DU1IST's Home Call is JF1IST.
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Nao Mashita, 8-2-4-2A Akasaka, Minato-ku, Tokyo 107-0052, JAPAN
107-0052 東京都港区赤坂8-2-4-2A 間下 尚彦
My Shack (Operate Room)
Our family: Raiden and Ganta (one year old)
KOHJINSHA VERSA Beam: Model KA1-206 (6m 9ele, 10m-20m 6ele)
This is quite new antenna VERSA KA1 which was developped by Kohjinsha Co.,Ltd.
VERSA can cover 8 ham bands (40m, 30m, 20m, 17m, 15m, 12m, 10m & 6m) by one antenna.
All frequencies are adjusted by motor drive copper elements with digital control in order to get the best performance.
Excepting 40m band, the antenna works as a full size YAGI beam. 40m band is performed with center loading coil equipped into AEU (Adjustable Element Unit). It enables to shorten approximately 30% length of element. This is new technology of adjustable antenna in the world.
This antenna is great product which took 2 years development period to enable the best performance of adjustable antenna system by JH1ECG and their group.
Top 30m 3ele, Under UB 10m-20m 4ele
5 element full-size yagi for 40 meters:
The antenna is designed to achieve superb front-to-back ratio.
Its driven element is designed to 7.200MHz and the box at its feeding point contains a couple of variable inductor coils which function to add element lengths. The box also contains another variable inductor coil which is used to adjust impedance. Utilizing CPU linkage, it can maintain, by step motors, SWR of 1:1.1 at 7.000 MHz through 7.200 MHz synchronizing with transceiver's frequencies.
The hot dip galvanized triangular cross section truss boom, made of lightweight steel pipes, is 21.6 meter long and weighs 85kgs.
Boom lock device:
In a country where there are a lot of typhoons, it is important to prepare to protect antenna systems.
The auxiliary crank-up tower, located 7 meters from the principal crank-up tower, is equipped with a V-shaped device to lock the truss boom, in order to be prepared to avoid strong wind damages to the antenna or a rotator.
My house (DU1IST)
Security Guard dog for DU1IST. You can trust the brave. (15-year-old boss dog center)
Beverage ANT for EU
Beverage EU 400m, USA JA 350m
1616371 Last modified: 2015-01-18 04:50:23, 5887 bytes
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