HDTV

The average life of an LCD is 6 years. Now this is average. They are too new to know for sure. They rarely burn out, unless they are defective from the start. Unlike an LCD a CRT display starts deteriorating in picture quality from day one and they have an average life of 4 years. That doesn't mean they won't work after 4 years it just means the picture quality is below a certain quality level after 4 years. They can actually work for 10-15 years or more, albeit with a poor picture. An LCD last longer, doesn't loose picture quality, takes up less room, and uses less energy, although they cost more. Weigh these factors before you buy. The prices of LCD are dropping all the time.

Contact the maker on their web site. If they are not in business, check gun shows, Shotgun News, Gun List, gun stores.

First of all you will need to snip the factory connector off near the speaker(s) you intend to replace. Then it is a matter of trial and error to get the correct polarity. If the polarity is reversed, you will still get sound out of the speaker, however, the tone coming out of the speaker will be higher (little to no bass). If that happens, reverse the wires and mount the speakers.

NTSC stands for National Television Systems Committee. It's the set of standards used for TV and video in the U.S. since 1953.

These are mandated standards for televisions sold in the U.S and some other countrys like Japan. They include an aspect ratio of 4:3, 525 horizontal interlaced scan lines, and 29.97 fps (frames per second).

Since NTSC allows the control of the HUE (tint) of the color unlike PAL that does not, many TV engineers used to say that NTSC stood for "Never Twice Same Color"

The classic AM transmitter layout is a master oscillator, followed by a "pen", or penultimate amplifier, followed by a PA or power amplifier. The master oscillator, which is probably crystal controlled, generates the carrier frequency.