Ads
related to: lightning arrester coax ham radiopasternack.com has been visited by 10K+ users in the past month
ebay.com has been visited by 1M+ users in the past month
Search results
Results from the WOW.Com Content Network
Powerline worker performs maintenance of a lightning arrester on an electrical transmission tower in New Brunswick, Canada. A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and ...
UHF connectors have a non-constant surge impedance. [4] For this reason, UHF connectors are generally usable through HF and the lower portion of what is now known as the VHF frequency range. [ 1 ] Despite the name, the UHF [ a ] connector is rarely used in high performance applications for today's UHF band, as the non-constant surge impedance ...
Counterpoises are typically used in antenna systems for radio transmitters where a good earth ground connection cannot be constructed.. Monopole antennas used at low frequencies, below 3 MHz, such as the mast radiator antennas used for AM broadcasting, require the radio transmitter to be electrically connected to the Earth under the antenna; this is called a ground (or earth).
A lightning arrester is a device, essentially an air gap between an electric wire and ground, used on electric power systems and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal.
Solar-powered Amateur Radio Station in tents. Note the portable VHF/UHF satellite and HF antennas in the background Rugged HF transceiver for voice communications. In times of crisis and natural disasters, amateur radio is often used as a means of emergency communication when wireline, cell phones and other conventional means of communications fail.
With no matching unit, Varney specified 75 Ω cable be used at the junction of the ladder line and coax (not 50 Ω); the higher 75 Ω impedance makes a closer match the end of the ladder line. An earth-grounded 4:1 voltage balun may be used to connect the coax to the ladder line, and 1:1 current balun should be used between the coax and the ...
Ads
related to: lightning arrester coax ham radiopasternack.com has been visited by 10K+ users in the past month
ebay.com has been visited by 1M+ users in the past month