What you need is a folded dipole that can be easily made from 300 ohm TV ribbon. Here is a link to a site that gives you instruction on how to make one. You need to check also what way your favorite FM station is polarised. In Australia, some(one at least) ABC stations are vertically polarised(meaning the antenna has to be vertical), presumably for better Car reception. But the majority are horizontal. Great results can often be achieved by splitting the signal from an external VHF TV antenna, but only if it is VHF, and the station you are looking for is in the same direction as the TV repeater. If you need any more assistance with this, just let me know. Rating this FixYa is a great reward for my time to address your request. Cheers, happy DXing
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To build antennas for any frequency use formula L=234/Freq. Lets say 100 mhz. That would be L=2.34 feet or about 30 inches(close). Ok, Build a dipole antenna with a plastic insulator and 75 ohm Tv Coax. Take stiff alumnium rods or wire. Punch a hole into a plastic piece 4 inches apart. Insert Rods on both sides. Take shiny screws (Not Painted). attach Center Coax to Right side and Shield (ground) to Left side. Silicone these connections and use Black tape to wrap it good. Mount it on your Chimney or on a Tv pole 12-25 feet. Now, the coax coming into your house has to hook to your stereo by a 75 ohm match coil bought cheap at Electronic stores or Tv, radio supply stores. Attach coax by screwing it to coil and the two prongs screw to Back of your Fm Stereo. It will say ANT and GND. on back of Radio. You should pull in Fm stations better than indoor antennas and get farther away stations. It may have a 3 Db gain. Its the same for Cb radio --Just Use L=234/Freq. it comes to 8.5 feet(102 inches) Roughly. Its all Dipole Technology ..No Commercial antenna but will get decent results.
The Bose has the option for external antenna, but uses the AC cord as the antenna, so first try stretching your AC cord to its fullest extent in a straight line, then in different directions to see if that improves the situation. This is for FM only. The AM uses an internal ferrite rod antenna, and this is sensitive to direction, so try rotating the radio in different directions to see if signal improves on AM, and place unit as near a window as possible.
If none of this helps, you will be able to use an external antenna, and no it is not mandatory that they be mounted outside ... as long as you have room indoors. In fact, several manufacturers market indoor antennas for apartment dwellers and others under restrictions against mounting antennas outdoors.
But, logically, the best way to improve reception is the largest antenna mounted as high up and as far away from obstructions between the antenna and transmitter as possible.
Don Miller, CET
Bose Wave Radio Repairs
Both of my Marantz receivers use a 75 ohm coax input. The receivers included a single wire antenna that simply plugs in. The plug is suitable for coax cable going to an external antenna. You can also get a small 75 to 300 ohm transformer that will allow you to use a dipole or other common indoor FM antenna.
If it is a plug, it is probably the PAL connector so you would need a PAL female on your coax lead.
There is a great reference at the FM Antenna Connector and Adapter Guide with pictures:
FM Antenna and Connector Guide
FM DX Antenna Co
If the antenna is in a basement that is the problem - the fact that it is below ground means that no signals can get through.
Radio signals are blocked by buildings, large lumps of metal or other solid objects as well as strong magnetic fields (which can include electrical devices within the home).
To pick up good radio reception you will need an external antenna above the ground level - preferably as high as you can get it. Unless you get an omni-directional antenna like this one http://www.maplin.co.uk/vhf-fm-omnidirectional-aerial-874 you will need to point the antenna accurately at the transmitting station (+ or - about 5 degrees) for FM. At a pinch you might get by with an indoor aerial but it needs to be above ground level (inside a roof would be best)
Good external AM Radio aerials are harder to find these days.
Absolutely, as long as the radio has connections for an auxiliary antenna. You can also connect to an indoor antenna that's a lot better than the wire antenna that your set comes with. For options, try searching eBay for FM antenna.
Product Specs:General:Product TypeRadio antennaRecommended UseIndoorWidth3 inDepth16.9 inHeight3.5 inColorBlackLocalizationEnglishAntenna:Wave BandAM, FM / FM: 87.5 - 108 MHz, 540 - 1700 kHzImpedance75 OhmGain Level42 dBAmplifierBuilt-inIncluded AccessoriesConnector coupler, impedance transformerConnections:Connector Type1 x FM antenna ¦ 1 x AM antennaPower:Power DevicePower adapter - externalManufacturer Warranty:Service & Support1 year warrantyService & Support DetailsLimited warranty - 1 yearlet me know how this works out for u