This sorts out Internal cards from External ones.

This filter sorts the digital tv-cards from the analog ones.

Here you select what kind of interface you would like on your TV-Card

Depending on where you live, your TV signal system is PAL, NTSC or SECAM. This filter helps you to get the correct TV-Card for your signal-system.

This filter show if card has FM-Radio support.

Some TV-Cards support and can handle Teletext. This filter helps to sort them out.

This filter lets you find what TV-Cards that comes with a remote.

This filter show if card has a Composite In connection.

This filter show if card has a Composite Out connection.

This filter show if card has a S-Video In connection.

This filter show if card has a S-Video Out connection.

This filter show if card has Scart connection.

A vacuum tube is somewhat like a light bulb: constructed of glass and inside this glass envelope there is a heated filament. The interior of the tube has all the air evacuated (thus the vacuum). The heated filament gives off light, which we can see, just like a light bulb.

However, the light in the tube is just a byproduct and the light just looks good. Of more importance are the electrons which hover around the heated filament. Vacuum tubes contain other elements which are the real reason for their function. In a basic tube, there is the filament (often called the "cathode"), and a metal strip (called the "anode" or "plate") situated near the inside edge of the tube.

When a positive voltage (usually in the hundreds of volts) is connected to the plate, the electrons at the cathode, by their negative charge, are attracted to the positive charge of the plate.

Flow of electrons from one point to another is called "current" (measured in amperes, or "amps"), and movement of electrons from the cathode to the anode falls into this category.