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Channel Master Manufacturers of HD TV Antennas (Ariels) Preamplifers (Preamps) Distribution amps, and antennas Mounting Channel Master Canada Distributor Save And Replay. Channel Master is a US company that manufacture products for O.T.A. (over the air). They manufacture a range of outdoor antennas suited for receiving an over the air digital signal to enable you to capture far away towers and receive a crystal clear digital picture and even breath taking HD signals using a HD Antenna. Channel Master also make Amplifers and mounting Hardware for your HD Antenna installation.

Channel Master 7778 Titan 2 preamplifier (Mast mounted with internal power supply)

Channel Master 7778 Preamplifer CM-7778 CM7778
The Channel Master television antenna booster (preamplifier) will amplify digital and HD signals received by your antenna. This antenna amplifier is a high gain, higher noise then orignal 7778 preamplifier used for medium to weak signal areas to allow a weak signal that is present at the antenna to be amplified to a viewable strength. The CM7778 preamp offers less gain than the Channel Master 7777 Titan 2 (CM7777) but still has plenty of gain to get the signal from the antenna to the TV set. This preamp is a perfect choice if you are in a medium strength signal area but are still having trouble receiving good signals. Preamplifiers are also used if you anticipate distributing your signal with a digital splitter to multiple outlets throughout your house as splitters reduce the signal strength available at each output. 16DB.

• Combined VHF/UHF inputs

• Gain: 16 dB, 54 to 860 MHz

• Includes a switchable FM trap

• Outdoor rated housing

• Mast mounted amplification unit with indoor power supply which connect via coaxial cable

• Channel Master 7778 Preamplifier and its power supply can withstand up to 140° F temperatures

A mast or antenna-mounted amplifier (preamp) like the channel master 7778 Titan 2 is used primarily to overcome the loss in the coaxial cable between the antenna and the TV set. In areas distant from TV transmitters, overcoming this loss is necessary since the signals are already weak. In areas close to TV transmitters, a preamplifier is usually not needed, and can actually cause problems as it may cause the signal levels to be too high.

The only sure way to determine if a preamplifier is needed is to measure the received signal levels with a field strength meter. Since this is not usually available for most home installations, determining the correct preamplifier can be a challenge. One good way to determine if a preamplifier is needed is to always run your cable from the antenna directly to your TV, watch and monitor for an hour or so. Pick on the more difficult channels that are far away and see if the signal is stable running only one TV, if your signals are unstable or you see some pixelization then you most likely will see an improvement by installing a preamplifier. You can run this test by opening a window or door. Putting in a distribution amplifier for splitting the signals will most likely be the same result as you are already having signal issues going to one TV and amping at the distribution point can only amp what you already have. If your signals were good running to one TV, then bring the cable into your distribution point and split your signal with a regular splitter then test on all Televisions. If your are not performing well once you split the signal then usually a distribution amplifier is all that is needed to maintain the signal. As a splitter is a take away and a distribution amplifier will boast and split the signals for multiple locations. You rarely need both a premaplifier and a distribution amplifier as this will over drive your signals.

Another possible need for a preamplifier will be on installations with long coaxial cable runs from the antenna to the TV set. If there is 50 feet or more of cable between the antenna and TV set, a preamplifier may provide an improvement.

One more situation that may benefit from use of a preamplifier is when multiple TV outlets are being fed from the same antenna. Since the splitter used to connect multiple TV sets cause signal loss, a preamplifier at the antenna can help overcome these losses by increasing the signal levels at the antenna.

Channel Master provides preamplifiers with two amounts of gain - the Channel master 7778 (CM7778) has 16 dB of gain and the Channel Master 7777 (CM7777) has 30 dB of gain. In most cases when the channels you are trying to view are fairly nearby, the Channel Master 7778 (CM7778) should have sufficient gain, even when feeding up to four TV sets, as long as the coaxial cable lengths are not excessively long. For Distant towers, deep fringe, channels, or in installations with very long cable runs and a high number of TV sets, the Channel Master 7777 (CM7777) may be the better choice. For conditions where some nearer towers may over amplify the signals the channel master 7778 Titan 2 is a better choice.

In some instances, it may be necessary to use both a preamplifier at the antenna and a distribution amplifier inside the house, but in most installations, there is no advantage to using both at the same time.

Installing a Channel Master 7778 Titan 2 Preamplifier (CM-7778) Preamplifier

A channel master 7778 preamplifier consists of two units: a channel master 7778 Titan 2 mast mounted preamplifier and a power supply. The channel master mast mounted preamplifier itself is mounted on the antenna boom or on the mast as close to the antenna as possible. The power supply unit is mounted indoors. Power is supplied to the preamplifier unit through the coaxial cable. You must power the channel master 7778 preamplifier power supply either behind your television if you are running to only one TV, or before you split your signal at your distribution point in order for the mast mounted preamplifier to get the power through the coax. If a splitter is introduced inline the mast mounted preamplifier will not be able to recieve power (unless you use a one way power pass splitter).

The Channel Master 7778 titan 2 mast mounted preamplifier is located as close as possible to the antenna feed point because the weak received signal must be amplified before it is attenuated by the coaxial cable, and also before it can be subjected to interference from sources between the antenna and the receiver. Preamplifiers mounted farther from the antenna usually amplify (magnify) the interference along with the signal.

The Channel Master 7778 Titan 2 Preamplifier units come with U-bolts for easy mounting on the mast or the antenna boom. After the Channel Master 7778 preamplifier is attached to the antenna or mast, run a length of coaxial cable from the antenna output connector to the input connector on the preamplifier. Leave enough slack in the transmission line to form a drain loop. This will keep water out of the amplifier housing.

Next, run the coaxial cable from the output terminals of the preamplifier to the power supply. The coaxial cable also carries power to the amplifier. There is no separate power line to run.

All connections must only be finger tightened and never with a wrench.

Connect the coaxial cable from the antenna to the input terminals on the power supply unit. Next, run a length of coaxial cable from the power supply output terminals to the TV or splitter if you are going to a distribution point.

The last step is to plug in the power supply. Because it uses less current than an electric clock, it will not be expensive to leave it plugged in.


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