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.
ATSC is the standard for over-the-air broadcasts of digital TV stations. You can buy ATSC antennas and ATSC tuners that will enable you to receive digital stations over the air.You can use HDTV's to display digital stations, or buy an ATSC converter box to use an older television.Check out NAB Station List to find what RF channels are used by the tv stations in your area.If the RF channel is. , then you need a VHF antenna for that channel.ou can use HDTV's to display digital stations, or buy an ATSC converter box to use an older television. Check out NAB Station List to find what RF channels are used by the tv stations in your area. If the RF channel is. , then you need a VHF antenna for that channel.