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2015年9月

2015年9月20日 (日)

Test of vertical antenna

I tried to test of vertical antenna that is made of me at the near the beach today.

I made 2 types vertical antennas.
First , I made it that is un- grounded  vertical antenna.
That  specs are very simple.
Antenna element is made of copper wire,Height is about 4m,.
Ground,that's made of grid of iron,about 2.0m * 1.5m ,and add the zinc sheets for 4 direction
.
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(Ground is made of grid of iron)
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I measurement this antenna impedance.
That  tuning is about 15.6MHz(parallel mode).
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That's is very High Q!!
NEXT, I made a grounded  vertical antenna.
That is supplying to center antenna.just like YAGI antenna.
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The imaginary part is starting ”+j(Ω)”,and that inclination curve is very ⊿up.
I think that antenna is not easy to adjust  Z MATCHING.
ANYWAY, I able to get some date of  grounded  vertical antennas.
I am so happy!!!

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2015年9月 5日 (土)

A LITTLE GIRL CW'er

I was surfing YOUTUBE last night.

I found a nice movie that title is "How to use Morse code keys Demonstration by 10 year".
A little girl who uses some kind of manual Morse code keys. so she plays those keys very well!!. 
she is nice and great CW'er!!
I'd like to be in radio communication with her  to use the Mores code keys each other.
 

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