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How to build an indoor dx fm only antenna?

I want to build an antenna cut only for fm, dx.

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Hi lgcphoto

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

regards
robotek

Posted on Oct 19, 2008

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Posted on Jan 02, 2017

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Building your own Antennas


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.

on Apr 01, 2011 | Audio Players & Recorders

1 Answer

Have a bose wave and live in a metal building. Can't get hardly any am fm radio recept. 3.5 mm antena jack. Can I get an am fm antenna? And do I need to mount antenna outside?


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.

Good luck.

Don Miller, CET
CET Services
Bose Wave Radio Repairs
don.miller60@outllook.com

Apr 30, 2016 | Bose Audio Players & Recorders

1 Answer

Fm aerial connection ?


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.

Feb 11, 2015 | Marantz Audio Players & Recorders

1 Answer

Where can I order an antenna forthe CD BA 2100 stereo


Hi,you can find it any Electronic Store or even Hardware store..Just ask for " FM antenna Cable " of course this is a passive antenna.
.if you have any reception problem to get FM signals on your location ,than you need to buy" Active FM antenna" with amplifier.....before go to store pls take a look at the rear panel of your stereo to see and decide what kind of FM antenna plug you have it..
if you want to buy these thru ordering you can find thousands available in EBAY web site..
Below are 2 URL as different type..TERK is a successful antenna.
Hope this helps!..if more help requires pls let me know.
Take care and please
Remember to rate/vote and give me 4 Thumbs Up for me to
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or Helping out the Community :)

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http://cgi.ebay.com/Terk-Audiovox-AM-FM-Indoor-Stereo-Antenna-Gamma-Loop-/110716385684?pt=LH_DefaultDomain_0&hash=item19c735f994


http://cgi.ebay.com/New-DTV-HD-FM-Rotating-Indoor-Digital-Antenna-Remote-/230517606660?pt=LH_DefaultDomain_0&hash=item35abeb8904

Jul 23, 2011 | Sharp CD-BA2100 CD Shelf System

1 Answer

I have a Philips MC235B micro stereo system, but I'm too dumb to figure out the FM antenna connector type. Any help would be great, thank you!


Hi,
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
Lake FM DX Antenna Co

Jun 11, 2011 | Audio Players & Recorders

1 Answer

My Klh r3000 receiver is great for everything except picking up am or fm stations? I had an antenna attached, but the unit is in my basement, and I get no signals at all. What could I be doing wrong?


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.

Feb 24, 2011 | KLH R3100 Receiver

2 Answers

The FM antenna is insufficient. I there a way to improve reception? Another antenna that will fit?


To improve reception, use a 75 Ohm outdoor antenna instead of an indoor antenna. Disconnect the indoor antenna before replacing it with an outdoor antenna.

Dec 14, 2010 | Insignia 200W Stereo Receiver

1 Answer

We purchased an HD Radio and find that it cuts in and out...can one connect the radio to an outdoor Antenna to resolve the situation


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.

Jul 09, 2009 | Radio Shack Accurian APD-3955

1 Answer

Can't find the voltage specs for terk 9330 tower fm antenna


Product Specs: General: Product Type Radio antenna Recommended Use Indoor Width 3 in Depth 16.9 in Height 3.5 in Color Black Localization English Antenna: Wave Band AM, FM / FM: 87.5 - 108 MHz, 540 - 1700 kHz Impedance 75 Ohm Gain Level 42 dB Amplifier Built-in Included Accessories Connector coupler, impedance transformer Connections: Connector Type 1 x FM antenna ¦ 1 x AM antenna Power: Power Device Power adapter - external Manufacturer Warranty: Service & Support 1 year warranty Service & Support Details Limited warranty - 1 yearlet me know how this works out for u

Jan 31, 2009 | Audio Players & Recorders

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