BV5AF, BV5YIARU Liaison officer

Introduction

1834 S. F. B. MORSE () 1865 J. C. Maxwell1888 H. Hertz1895 G. Marconi 1902 E. Kennely; O. Heaviside1922 J. R. Carson SSB1925 E. V. Appleton; M. Barnett; Breite; Tuve 1926 1935 E. H. ArmstrongFM

1937 A. H. ReevesPCM1938 A. H. ReevesPCM1941 1945 CBS1948 C. E. Shannon1950 W. B. Shockley1957 1963 TV1965

1nm=10-9metres

2003=299,792,458 m/s 3x108 m/s1.2

1. R: C:L:

2.(1)E (VOLTV)(2)I (AMPEREA)(3)R (OHM)I=E/R E=I*RR=E/I

3.P(WATTW)P=E*I4.AMAMFMFMPMFM

5.(USB)(LSB)(SSB)(DSB)DSBSSB

6.()F(HERZ, Hz):(KHz=103)(MHz=106)(GHz=109)(,m)(V)(F)=3x108/F

960713 4 5

53:

:BAA-BZZXSA-XSZ3HA-3UZ

()

- BX4A: BQ2A :BU2AI, BV5AF, BM7AA, BX8AA :BM2AAA, BU4AAA,BX5BBB()

31 33

47

47

()

Ear-Phone with Mic

-

Morse codes

73 55 88 99 (Get out)ANT Yagi CQ GP DX Mayday GMT Pan Pan OM FB Fair businessSOS UTC ()VIA YL XYL ()

PTT0.51

:PTTMic12-20 cm

:

BM4AAABM5AC :

Thanks & 73