antenna?

[hermanv]

Sorry, but that will not work. Antenna on the rooftop will not see any signal if signal is blocked by the hill. Antennas will only receive and not transmit (unless it is a transmitter)

Sorry, that will not work. Best solution would be to run a strait line from antenna to your receiver to take advantage of antenna. You may have to get up on the roof to adjust the antenna for best signal and lowest noise

Smokey, you not only get it wrong but you get it wrong twice. If you drive a voltage of the correct frequency into an antenna it will transmit that signal. This is just as true for millivolts as it is for kilovolts. There is just no difference between a transmitting antenna or a receiveing antenna. Using a passive antennna coupling is no different from using a transformer both will couple a signal through a gap. I have done this, it works. No it is not as good as a direct wire connection, it is lossier but not by that many dB.

How do you think those car cell phone through glass couplers work? And they work both ways, transmitting and receiving. People with radio transmitters usually use the same antenna to listen as they do to send, really all antennas work both ways, no magic.

[Whatever6750]

I just got one of thease http://www.partsexpress.com/pe/showd...number=210-020 and im useing a 300 to 75ohm adaptor and seams to pick up radio siganls a bit more but also picks up static more. My favorite station comes in good thow.

cence the antenna is so cheap i might just try the throw window thing. Eavn if it dosent work it wont rilly matter becuse the antenna is soo cheap. like $1 from PE whitch im starting to rilly like haveing localy. Thay have a a little showroom/store up in front that pritty nice.

[nightflier]

Our neighborhood has rather draconian association rules and placing antennas above the roofline is a big no-no. If I wanted to cheat and use a T-shaped antenna and run it along the slanted roofline of my house, at the gable so that it would hardly be noticeable (instead of a T-shape, it would then have more of an upward-facing arrow shape). I could get away with this if the wire is thin enough as it won't be visible from the street where the narcs will be looking for it.

Would the non-T shape affect performance?

[hermanv]

The long leg of the "T" is really not part of the antenna, it is simply the output wire. If you run it parallel and close to one of the "T" arms unforntunately it becomes part of the antenna though.

The edge of the roof will be OK if there is no gutter or at least not a metal one. It will work better if it is spaced away from the roofing material especially when it rains.

Those "T" antennas have no gain they will not do much in low signal strength areas, think of them like "rabbit" ears for TV, a desperation measure.

[Lensman]

Our neighborhood has rather draconian association rules and placing antennas above the roofline is a big no-no. If I wanted to cheat and use a T-shaped antenna and run it along the slanted roofline of my house, at the gable so that it would hardly be noticeable (instead of a T-shape, it would then have more of an upward-facing arrow shape). I could get away with this if the wire is thin enough as it won't be visible from the street where the narcs will be looking for it.

Would the non-T shape affect performance?

If you have an attic, you could actually mount an outdoor antenna inside it. Just nail up something like a broom handle, run some wire and clamp on the antenna. Though the close proximity of the house's structure, roof and any wiring up there will compromise the antenna a little, a reasonable yagi/TV antenna in an attic will still beat a T-antenna outside by a considerable amount. As mentioned above, your method of mounting the T-antenna also weakens it (anything closer than about half a wavelength becomes part of the antenna). Quite a number of people in outlying areas use attic-mounted antennas to pick up weak stations with great success.

[Smokey]

There is just no difference between a transmitting antenna or a receiveing antenna.

That is true. But one really need "power" to overcome losses by antenna (as antenna itself is not %100 efficient) and to project any type of signal. Signal strength the antenna on the hill will receive probably will be microvolts range, and that will not be enough juice to drive another antenna to transmit signal down the hill.

You said you seen poeple place a high gain antenna on the hill behind their house, with that antenna wired directly to a second antenna facing down the hill towards their house. And a third antenna on the rooftop aimed at the second antenna on the hill will let the house "see" over the hill.

That concept work like a repeater on top of hill. But for repeater station to work properly, it need to amplify it (to get it above noise and over come transmiter deficiencies) and then send it out again via transmitter antenna--as signal is too weak by itself to drive any type of transmitter and will get buried in the noise