Radio Road

buy two and get double the gain!

203.129.38.119

In Reply to: RE: Better SR-100 or ST-2 Magnum antennas? posted by Mywing on October 08, 2007 at 15:09:25

If it MUST be an indoor antenna, which is NOT ideal, there is only onne truly good indoor antenna.

BUT you need suitably a sized and oriented rooms - orientation? - to desired stations - the type being a wire rhombic* (or two or more), being are the only indoor antenna with truly high performance.

*? they look like this <> ---> being the axis of reception - from the narrow end where the loading/matching resistors go. Note that each of those four sides needs to be a minimum of 8 feet long and the longer thnat that the better - IE exceeding the wavelength at 98 meg (band II's centre) which is about 11-12 feet. Of course, the lower freq (88-98) college stations have even longer wavelengths!

Yes, they must point AT the transmitter/s - of the station/s you want to receive. FM just is directional, and sound quality is reduced by reflections of the signal before it reaches your 'tenna. A directional antenna can reject the signals that have been reflected, and drives your radio harder, thus lowering Total N&D, a LOT!

A rhombic can be hidden easily against a ceiling if made from white covered wire (or under a BIG rug)! Use white plastic cork-board pins to hold them to the ceiling's plaster-board. Even with the loading resistors they cost only a handful of dollars to make. And they eat all whips, omnis and folded dipoles for sound-quality.

You can make them out of TV ribbon (flat twin-lead) or even fig 8 wire and get a double antenna with twice the gain.

BUT given that your SO will want them to be hidden or camouflaged, you can't 'display' them. Sorry about that.

Warmest
Timbo in Oz
The Skyptical Mensurer and Audio Scrounger
And gladly would he learn and gladly teach - Chaucer. ;-)!
'Still not saluting.'
http://www.theanalogdept.com/tim_bailey.htm

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RE: buy two and get double the gain! - Mywing 10:56:45 10/09/07 (0)

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