FCC 米国アマチュア無線 General Class の勉強に向けて弱点のメモです。
攻略のポイントは理解しようとせず、単語を拾い集める事です。
何度かやると内容が想像できるようになってきます。
My weak point
Aurora > VHF reflect
solar radiation > 10.7cm
coronal mass ejections > 20-40 hours
K-index > short term stability
A-index > long term stability
30m band > phone image prohibit
inpedance > AC opposision
reactance > capacitance or inductance
ALC > reduce distortion to excessive drive
IF shift control > close the receive frequency
reason to use impedance matching transformer
> to maximize the transfer of power
impedance matching between two AC circuit
> insert LC network
improper action ALC > distort superiors emission
field strength meter > radiation pattern of an antenna
directional wattmeter > SWR
two-tone test analyze > linearty
◯watts pep
beacon > 100 watts pep
1.8 MHz > 1500 watts pep
60m band (5 Mhz) > 100 watt pep respect to a dipole
10.140 MHz > 200 watts pep
12m band( 25Mhz) > 1500 watts pep
28 MHz > 1500 watts pep
【興味ある事】
PACTOR
WINMOR
JT65 JT9 FT8
