Dear Mr. Gautam,
The reception will depend on many factors like your location geography, multipath reception/nullification, height of the antenna mounted, even receiver capabilities etc. This is a broad subject, can't put everythibg here, I suggest you google it for more information.
You can first scan your building terrace using a sensitive FM portable( eg,SONY SW7600GR, DE1103) and find a location where the desired signal strength and signal quality is optimum. There you stretch the antenna and have a stable reception of surrounding signals, or you effectively 'pulling' those signals to your indoor receiver without any signal loss by providing adequate amplification. Hence you don't need to fiddle with your indoor antenna and it's directions and length to receive each signal, additionally you get many signals available on your rooftop those will be normally highly noisy or not at all available at indoor location.This is what simply this antenna will do for you!
The antenna element is just a halfwave dipole oriented for omnidirectional application, if you receive a stereo signal from 100Km away and is still noisier, then try increasing the mounting height. You should see difference. I forgot to mention that this antenna comes with few meters of RG-59 cable that should be acceptable for normal applications, however I suggest to use RG-6 for durability and if you stretch the antenna more upwards. With RG-11 you never need to worry about a signal loss
For a guaranteed coverage of a distant station at 100Km away, you may later modify and use a Yagi element with the LNA as I said in previous post. But you may need to rotate the antenna for catching signals coming from other direction, with omnidirectional setup you get clear local signals + marginal reception of distant signals. I was only getting a noisy reception of few local signals at indoors using a wire antenna, now I only needed to switch between the preset FM stations to receive many high quality stereo signals. Stable reception from all directions, No fiddling, no worries!
My installation was not more than 6meter high, and the farthest signal I could detect was from 200kms away(Thiruvananthapuram) from my house located near Cochin. This was highly noisy, only shows it's presence there. Although I was surrounded by trees, there was no heavy obstacles or multistoreyed buildings nearby. So don't immserse the antenna in the middle of a concrete jungle and expect high results.
If you plan to build a Yagi truly DX antenna later, you can order the following parts from the company, refer any website/books to get measurements and constructional notes:
> FM LNA
> DC/RF separator
> 250mA,12V DC adapter(DIY this thing if you can, but don't use noisy SMPS)
> Coax connectors
> 300ohm to 75ohm balun to use with folded dipole(this thing is our vintage television antenna adapter)
Feed the high quality FM tuners the essential thing, raise them above the signal poverty line, and you rock
Hope I have given a clear insight of this antenna that will take your Tuner/AVR's FM radio into performance level!
Thank you,
AKR