DB420系列天线说明书 Figure 3. Joining the Mast Sections.Do not install near power lines. Power lines, telephone lines, and guy wires look the same. Assume any wire or line can electrocute you.Do not install on a wet or windy day or when lightning or thunder is in the area. Do not ...
this multivibrator working through an RC circuit into the base of a transistor forming part of the oscillator so as to apply to it a sawtooth signal modulating the generated high-frequency oscillation in both amplitude and frequency, the modulated oscillation being sent out via an antenna coupled ...
转盘入口识别系统组成:(5001420H包含部件) 序号 5001420H ROTARY ID PARLOR COMPONENTS 200 阿菲金转盘识别系统组件 数量 1 4025200D ID ANTENNA ACT FREQ 200 15M CABLE 识别感应器(200KHz)15M配线 1 2 4022900 IDEAL II CONTROLLER 识别控制器 1 3 5000857H ROTARY ID PHOTOC+ANT ASSMBLY 200 转盘牛位...
dipole assem-blies on the upper mast are positioned in line (collinear) but off-set by 90° from the four, collinearly stacked dipole assemblies on the lower mast. When all sets of dipoles are in line as shown in Figure 1 (collinear DB420L, DB420DL, DB420QL), the DB420antenna has...