Antenna help - Boston Area

[NascarNHIS]

New to OTA, I just dumped DISH. I setup a cheap set of rabbit ears (RCA ANT112R) and receive a few channels. 2-1 5-1 5-2 62-1 62-1. I then I remembered I have a 30 year old TV antenna (model unknown) mounted about 30 ft. high on my chimney with an old thin twin flat wire 300ohm cable so I connected that with a balun directly to my VISIO XTV553SV flat screen. And did much better. I now get
2-1 WGBH-HD 1080I
2-2 WORLD 480I
4-1 WBZ-TV 1080I
5-1 WCVB 1080I
5-2 METV 480I
25-1 WFXT 720P
38-1 WSBK-TV 1081I breaks up, poor reception
44-1 WGBX-HD 1081I
44-3 CREATE 480I
44-4 KIDS 480I
62-1 WMFP 1080I
62-2 WMFP DT2 480I
Do not need this channel 66-1 wutf-dt = breaks up .

My question is what do I need to do to get
7-1(42) WHDH NBC BOSTON 2Edge = (priority 1 for me)
56 WLVI- CW Cambridge Edge1
68-1 WPBXTV Boston Edge2
38-1 WSBK-TV want to improve quality Edge1 = (priority 2 for me)
Do not need this channel 60 W NEW
Do not need this channel 27 -1 WUNI
Do not need this channel 48-1 Daystar
Do not need PROVODENCE chanels , only BOSTON
.

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dcc4945387a4908 01826 15ft map


I would much prefer locating a new antenna pointing south from a location 15 ft. above the ground on my front porch roof with about a fifty foot run of coax.. I want to avoid going up on my main roof to the chimney, that would be about a 100 ft. run and I do not like going up on the steep roof.
I want to setup a new second TV. (I have not yet purchased the new second TV so cannot give you a model number) The second TV will be close, less than 20ft. from the porch antenna location.
Cost is not a major object but if I can get away without the complication of an amplifier that would be nice.

I have been told that I should probablyy use a 4-bay antennas: such as
Antennacraft U-4000
Antennas Direct DB4e
Channel Master CM-4221
Winegard HD-4400
I plan on initaly installing at 15 ft. then going up to the 30 ft chiminy if I need to.
Any recommendations appreciated. Thank you

[ADTech]

A 4-bay antenna should do fine. A medium-range UHF Yagi would also work. Shouldn't need an amplifier as your signals are forecasted to be moderately strong.

Keep in mind that the successful antenna mounting location is not dictated by one's wishes, but rather by where the signals happen to be found. You can improve your odds greatly by locating a spot that offers the clearest possible line of sight back towards Newton and test-mount the antenna there. Be prepared to try different locations. Don't drill any holes until you have found a satisfactory set of signals.

[NascarNHIS]

Your point of location being determind by signas is well taken. I am hoping to use the 15ft location my DISH was located at but understand I may end up at the chimny.
Can you or someone else educate me a bit about the pros and cons of a 4-bay antenna vs. a medium-range UHF Yagi .

Thanks for your help

[GroundUrMast]

A 4-bay antenna is actually four receiving elements ganged together to improve gain, receiving pattern or both. There is a reflector placed behind the active elements.

Examples of 4-bay antennas are:
Antennacraft U4000
Antennas Direct CS4, DB4 and newer DB4e
Channel Master CM-4221

Most 4-bay designs stack the elements Vertically to focus on the the horizon (to make the antenna less sensitive at angles above and below the horizon). These antennas generally have a wide pattern horizontally (stations to the left and right of the point of aim are still in the antennas 'view'). The CS4 is an exception, by stacking two pairs side by side, the antenna has a narrower view in the horizontal plane while having a bit more sensitivity to signals bouncing from upper layers of the atmosphere.

A Yagi antenna generally has one receiving element aided by a reflector and one or more director elements. The longer the antenna, the more directors, the higher the gain and the narrower the receiving pattern.

Examples of UHF Yagi designs:
Antennacraft MXU47 & MXU59
Antennas Direct SR8, SR15, 42XG, 43XG & 91XG
Channel Master CM3022, CM3023
Winegard HD9022, HD9032, HD9075P & HD9095P

[teleview]

I recommend reception of both the , south and north Digital Tv stations/channels.

Install a ANT751 antenna above the roof in such a manner the the roof or house is not blocking reception to the south and north.

Aim the ANT751 antenna at about 0 degree magnetic compass direction , north.

Here is how to aim antennas , http://www.kyes.com/antenna/pointing/pointing.html.

So you say , why aim the antenna north when the main group of Tv stations you are interested in are to the south.

And I say , the south group of Tv stations are strong signal strength.

The north group are weaker signal strength.

The ANT751 antenna does have some forward gain to improve reception to the north , and will also receive very well at the back of the antenna.

So aim the ANT751 at the weaker Tv stations to the north.

And the much stronger Tv stations to the south will be received through the back of the ANT751.

No preamplifier required.

For 1 Tv connected use no splitter.

For 2 Tv's connected use a common simple 2 way splitter.
_________________________

As always trees and tree leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions including your own house.

It is best install the ANT751 antenna at a location that has the least amount to no amount of obstructions in the directions of reception including your own house.

The Tv/s Must Channel Scan for the Digital Broadcast Tv Channels , sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.

DO NOT channel scan for cable tv channels.