There are two main types of heat pumps: geothermal heat pumps and air-source heat pumps. A geothermal heat pump draws the heat from the ground, while the air-source type pulls the heat from the air outside.
RF cables are a type of coaxial cable that is used to send radio frequency signals. RF cables are often used to send video information to a TV set. Identification. RF cables can be identified by the connectors at the end of the cables. RF cable connectors have a single pin that plugs into the RF input on a TV or other device and a threaded piece of metal around the connector that can be used to secure the cable to the RF input port. RF cables are commonly used in cable TV and Internet connections.
HDTV Antenna Coaxial Cable. Signal loss is crucial to high-frequency signals such as those most HDTV broadcast. These cables are rated at 75 ohms and offer a larger insulating dielectric than regular coaxial cable to ensure a perfect picture every time. Antennas Direct offers three types of cable: RG6,Quad-Shielded RG6, and RG11. If you're installing an indoor antenna or a short outdoor run, a standard RG6 cable should meet your needs. The quad-shielded RG6 cable features additional foil shields to fight electromagnetic interference and is ideal for longer runs.