Showing posts with label hd antenna. Show all posts
Showing posts with label hd antenna. Show all posts

12/07/2011

C. Crane FM Reflect Antenna Review

C. Crane FM Reflect Antenna
Average Reviews:

(More customer reviews)
Amazon's price for this antenna was the best I could find. I ordered it on a Sunday before a Monday holiday and it was delivered the following Wednesday via their Super Saver free shipping, which I considered to be excellent service. This antenna looks better than a twin-lead dipole antenna, appears to be well-made, comes in an attractive box with a balun coil (matching transformer) for connecting to screw terminals and also an alligator clip for hooking it to a built-in antenna.
Since this antenna has received mixed reviews from other users I decided to be as "scientific," as my skills and equipment would allow. I used my training as an FCC licensed broadcast engineer to compare it to the standard twin-lead dipole antenna that was included free with my tuner. I had already oriented my existing dipole antenna for optimum reception, using my tuner's signal-strength indicators. I then used my tuner's scan mode to see how many stations it could find and I carefully wrote down the frequency and signal strength for each of the many stations that I can receive. Since I live about halfway between New York City and Philadelphia, my FM dial is crowded with stations.
After establishing a base-line of performance with my ordinary dipole antenna, I replaced it with the C. Crane FM Reflect Antenna and experimented with dozens of antenna positions to obtain best reception. Remarkably, mounting the C. Crane FM Reflect Antenna in the exact same position and location, that my twin-lead dipole antenna had been installed, gave me the best performance. After this optimum positioning, I once again used my tuner's scan mode to see how many stations it could find. I then carefully compared the signal strength from each station that my tuner found using the new antenna, with the signal strength that I had received with my previously-installed antenna. Although I saw no indication of a stronger signal on any of the existing stations, I was able to pick up two more stations in my tuner's scan mode with the new antenna.
As a percentage of the large number of stations that I could already receive at my location, I considered two additional stations a very small improvement. The difference easily could have been due to minor changes in atmospheric conditions between the tests. It was certainly not as dramatic as the improvement that I expected when comparing a $3 antenna with a $30 antenna. If you're using a good twin-lead dipole antenna and have adjusted its position for best reception, I believe that you'll need to upgrade to an outdoor antenna, such as the Winegard HD-6000 FM Stereo Antenna, to get a noticeable improvement. I could not find that the C. Crane FM Reflect Antenna is significantly better.
To understand why the results turned out as they did, it might be helpful to understand how antennas work. The most effective antenna elements in the FM and TV band are the length of the radio wave that they're tuned to receive. Our FM band extends from 88Mhz to 108Mhz, which represents a wavelengths from slightly more than 109 inches to slightly more than 134 inches. The higher the frequency, the shorter the wave.
A typical folded dipole antenna is about 61 inches wide, which is half the length of the average FM radio wave. Since the dipole is folded onto itself, it has an effective antenna length of about 122 inches, which is the average between the 109 inch and 134 inch wavelength extremes of the FM band.
There are several ways to increase the gain of an antenna. One way is to increase the number of active antenna elements that are exposed to the radio waves and connect them together. Another is to use a reflector to concentrate the radio waves onto the antenna. Satellite antennas, for example, reflect and concentrate very short waves onto a rigid dipole antenna by using a dish. Outdoor Yagi FM (and TV) antennas use multiple elements connected in tandem with reflecting elements in the rear to focus the antenna's sensitivity in a single direction. Such antennas are very efficient because they use both multiple elements and reflectors to increase gain.
Ultimately the Crane antenna, no matter how attractively it may be designed and packaged, cannot defy the laws of physics. It has only a single active T-shaped folded antenna element which is exactly the same as an inexpensive twin-lead folded dipole antenna. It is, therefore, not surprising that several reviewers including me, who have compared it to the cheap variety, have found that it gives no better reception.

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Whether you listen to a portable radio or a top-of-the-line stereo receiver, the quality of sound coming from an FM station is dependent upon the stations signal strength in your area. Adding an FM antenna can help greatly, so be sure to select the best FM antenna for your needs. The FM Reflect Antenna will work with any portable or stereo receiver. This antenna incorporates a new dipole design for maximum gain across the entire FM broadcast band. Up to 213 percent more powerful than a standard dipole antenna, it covers the entire FM band with an almost flat response, where standard dipoles start to fall off near the end of the band. Many FM stations now broadcast their signal with circular polarization. The FM Reflect Antenna is the only FM antenna that can be adjusted to take advantage of this. It is not affected as much by surrounding objects and people as other FM antennas are.

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8/09/2011

Winegard GS-2200 Sensar III Amplified VHF/UHF Antenna System Review

Winegard GS-2200 Sensar III Amplified VHF/UHF Antenna System
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This antenna pulls in the four major networks plus PBS with perfect HD reception. The four networks are all broadcast from towers located within one mile of each other. That makes aiming the antenna easy. The distance from the towers to my house is 31 miles. If the antenna gets more than 30 degrees off then reception falls off dramatically. The amplifier must be plugged in or there is no reception. It is an in-line amp that uses the coax cable. For my situation, it is the perfect antenna. The price was also nice and there is virtually no assembly.

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HDTV antenna with 0-30 mile range.

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5/15/2011

Antennas Direct DB8 Multidirectional HDTV Antenna Review

Antennas Direct DB8 Multidirectional HDTV Antenna
Average Reviews:

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Buying an antenna for your digital TV receiver? It can be difficult, eh? If you live in the city near the transmitters, it's fairly easy -- any small, truly omni-directional antenna will do fine (perhaps the Antennas Direct DB2). If, like me, you live 50+ miles from the TV transmitters and they're in different directions, it becomes a challenge. Here's some tips:
- No antenna is totally "omni-directional" (receives from all directions) no matter what the ad says. Every antenna receives better in one direction than another, and the high-gain antennas are the most picky. Your TV's rabbit ears antenna might do better than a fancy high-gain antenna if it's pointed in the wrong direction. If you buy a "uni-directional" or high-gain antenna, be prepared to spend a lot of time tweaking the direction.
- Don't believe the high-gain ratings, they're mostly marketing hype. There are independent web sites by antenna nerds that rate antennas fairly, so do some research. What you'll find is that every antenna receives some channels better than others -- for instance, it may have great reception ("gain") for channels 30-60 but be terrible for channels 1-20. Ideally, buy an antenna that has has good gain for the channel(s) you're most interested in... if you know what those are.
- Antennas are highly sensitive to position, direction, and things nearby that might interfere with the signals (trees, houses, traffic, the family dog, etc). So what works for me or your neighbor might not work for you. Even a slightly different location may have a huge effect on your reception.
I have a Channelmaster 4221 and an AntennasDirect DB8, one pointed at distant Seattle and the other pointed at Canada, and both connected to an RCA A/B antenna switch. Both antennas are excellent; the DB8 is slightly more sensitive but extremely hard to point. I would rate it 5-stars except it didn't come assembled and the assembly instructions are a bit puzzling. Construction and materials are good. The Channelmaster 4221 is somewhat easier to point but still highly directional; it came mostly assembled. Gain is good in my location. I'm only rating it four stars because the construction is less solid. If you're looking at these same two antennas but unsure of what to buy, I'd start with the 4221: it's much cheaper and more forgiving about the pointing direction. If you find yourself needing better reception, perhaps buy a preamp to go with it; if that still doesn't work, maybe move up to the DB8 or a higher mounting location.
Good luck!


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Intended for people at great distances from the transmitters, the DB8 is our most powerful multi-directional HD antenna. In fact, its 15.8 dB gain make it one of the most powerful multi-directional antennas available.The bow tie design of the DB8 uses triangular elements instead of rods to greatly increase the bandwidth allowing it to cover the entire UHF band. Additionally, the mesh reflector of the bowtie is more efficient than a rod reflector, is lower in weight, and provides less wind resistance for greater performance and durability.This DB8 is the ideal antenna for use in locations that can pull long range signals from various directions and offers an attractive alternative to using a directional antenna mounted on a rotator.

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