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#1
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I have a set of rabbit ears that was given to me several years ago for the
TV in the bedroom. The antenna cost about $15 in the 2002 catalog (Radio Shack quit publishing a catalog soon thereafter). I use a digital converter made under the RCA name and after the scan virtually all of the pictures came out far better than the old analog reception. However, almost all say "cannot get good reception rescan". The sound tiles in and out. The bedroom is on the second floor. I looked at amplified indoor antennas at Target and they sell for $20 to $50. The non-amplified is $18 (only one they have). Do most go to an amplified antenna or use an outside antenna? I just took down my old big outside antenna 3 years ago as we have Comcast cable in 3 rooms. Comcast cost $$$ for each set up and add more wires to the house. I also assume the signal gets weaker the more I add. Dave K4JRB |
#2
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"David Thompson" wrote in
m: I have a set of rabbit ears that was given to me several years ago for the TV in the bedroom. The antenna cost about $15 in the 2002 catalog (Radio Shack quit publishing a catalog soon thereafter). I use a digital converter made under the RCA name and after the scan virtually all of the pictures came out far better than the old analog reception. However, almost all say "cannot get good reception rescan". The sound tiles in and out. The bedroom is on the second floor. I looked at amplified indoor antennas at Target and they sell for $20 to $50. The non-amplified is $18 (only one they have). Do most go to an amplified antenna or use an outside antenna? I just took down my old big outside antenna 3 years ago as we have Comcast cable in 3 rooms. Comcast cost $$$ for each set up and add more wires to the house. I also assume the signal gets weaker the more I add. Dave K4JRB Rabbit ears aren't the best thing to receive DTV with. Most DTV is broadcast in the UHF band. Go to www.antennaweb.org to find a list of the DTV stations in your area. You will also see what channel they are transmitting on. (just because a TV station identifies itself as 'channel 12' doesn't mean that it is transmitting on the actual channel 12 frequency. There have been a lot of shuffleing around of the frequency assignments as part of this DTV conversion.). Antennaweb.org will also tell you the distance and direction to each TV transmitter with a color code indicating the type of antenna you will need. Armed with this information, you can set up a proper antenna. In my case, I went from rabbit ears (not very good) to a cheap set top loop (not much better). Then I yanked the loop and cobbled in a bowtie (getting better). Then, (I wish a took a picture) I cobbled up a hand bent bowtie out of 12ga wire and attached it to the top of the commercial bowtie. I finaly built a dual bowtie setup that can be seen he http://mysite.verizon.net/g_reeder/C...V_antenna.html Works very well for me. YMMV. There are other designs for DTV antennas on the internet. But instead of just randomly trying antennas, got that info from antennaweb.org so you know which dirrection to point the thing. |
#3
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In article ,
David Thompson wrote: I have a set of rabbit ears that was given to me several years ago for the TV in the bedroom. The antenna cost about $15 in the 2002 catalog (Radio Shack quit publishing a catalog soon thereafter). I use a digital converter made under the RCA name and after the scan virtually all of the pictures came out far better than the old analog reception. However, almost all say "cannot get good reception rescan". The sound tiles in and out. That does suggest that the signal is inconsistent - possibly it's weak, over-all, or possibly it's subject to momentary dropouts due to multipath reflections from moving objects (airplanes, trees, etc.). If you're in an urban area, multipath problems are likely to be at the heart of your problem. Moving the rabbit-ears around to different positions will give you some amount of gain and inteference rejection... you might find a position which gives you a more stable result on one or more channels. The bedroom is on the second floor. I looked at amplified indoor antennas at Target and they sell for $20 to $50. The non-amplified is $18 (only one they have). Do most go to an amplified antenna or use an outside antenna? As a general rule, I don't favor amplified indoor antennas. The amplification usually doesn't buy you very much, since the front-end section of the TV set has quite a lot of gain/sensitivity. The antenna's own amplification will simply "replace" some of the amplification in the TV (to no particularly good end), it will add some amount of additional noise, and it may be subject to strong-signal overload. Antenna-based amplifiers won't do anything to help multipath problems, or noise problems from nearby interference sources. Indoor antennas may work well, or very badly. A lot depends on the building construction. In some wood-frame buildings, they can work fine. If the outer walls are stucco (with embedded chicken-wire), or if the walls have foil-backed insulation, they may work very badly... the building acts as a partial Faraday cage, and blocks most of the signal. I just took down my old big outside antenna 3 years ago as we have Comcast cable in 3 rooms. Comcast cost $$$ for each set up and add more wires to the house. I also assume the signal gets weaker the more I add. For good TV reception, a reasonable-sized outdoor antenna on a mast is hard to beat. Getting the antenna up into direct line-of-sight of the transmitter/tower can help eliminate all sorts of reception problems. If you can't arrange a roof antenna, then a smaller beam antenna located in the attic might be a workable second choice. Yes, when you feed a signal down the coax into the house, and split it among several rooms, the signal in each room is weaker than if you fed the antenna output directly to a signal room. This is actually one of the situations in which an antenna amplifier can help: it makes up for the losses in the signal-division process and in the coax. Ideally, the amplifier is located close to the antenna, before any long run of coax and before any signal-splitter. Be careful, though. Many inexpensive antenna amplifiers (mast-mounted or part of a splitter / distribution box) use only a simple one-transistor amplification circuit, and can be prone to problems from strong-signal overload. If you're located near a TV transmitter (or a ham operator, CB'er, police/fire station, AM broadcast station) a strong signal from the nearby transmitter can saturate the amplifier, pushing it into distortion. The resulting signal on many channels can be worse than if there was no amplifier at all. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
#4
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David Thompson wrote:
I have a set of rabbit ears that was given to me several years ago for the TV in the bedroom. The antenna cost about $15 in the 2002 catalog (Radio Shack quit publishing a catalog soon thereafter). I use a digital converter made under the RCA name and after the scan virtually all of the pictures came out far better than the old analog reception. However, almost all say "cannot get good reception rescan". The sound tiles in and out. The bedroom is on the second floor. I looked at amplified indoor antennas at Target and they sell for $20 to $50. The non-amplified is $18 (only one they have). Do most go to an amplified antenna or use an outside antenna? I just took down my old big outside antenna 3 years ago as we have Comcast cable in 3 rooms. Comcast cost $$$ for each set up and add more wires to the house. I also assume the signal gets weaker the more I add. Dave K4JRB I put rabbit ears on top of a cabinet, extended 'ears' all the way out, put the 'ears' down flat (dipole) and turned broadside to TV transmitter area. Best reception other than outside antenna. Marv |
#5
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RABBIT EARS TIP 101# IF YOU WANNA TAKE THE TIME TO DO THIS STEP 1 TAKE
THE SCREWS OUT OF THE RABBIT EARS PUT AN 300OHM TO 75 OHM ADAPTER BETWEEN THE SCREWS TIGHT THEM BACK DOWN NOW YOU CAN GET SOME CABLE AND PUT THE RABBIT EARS OUTSIDE ON A POLE I USED ZIP TIES ON MY 20 FT POLE OR HIGHER THE BETTER TURN THE POLE FOR THE BEST RECEPTION ALSO WORKS GREAT FOR FM RADIO HOOK IT UP TO MY BOSE RADIO FOR FM DX ALSO FROM THE 4 LAND |
#6
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MTV wrote in news:3IAZl.158025$Lo1.62292@en-nntp-
04.dc1.easynews.com: I put rabbit ears on top of a cabinet, extended 'ears' all the way out, put the 'ears' down flat (dipole) and turned broadside to TV transmitter area. Best reception other than outside antenna. Marv You don't even need to put them all the way out. If channels 2-7 are vacated in your area, then you only need to have them out about 18 inches. |
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