$vboptions[bbtitle]   $vboptions[bbtitle]  
  Terms and Conditions     Project Showcase
  Resource Index   Speaker Terms Glossary
  Security/Privacy   Speaker Replacement Help
Results 1 to 10 of 10
  1. #1
    Join Date
    Dec 2009
    Location
    Rockford, IL
    Posts
    3,179

    Default Very simple DIY FM antenna works great!

    Some of you might remember the small system I put together for my parents with the $95 Sherwood receiver and a pair of repurposed Overnight Sensations. They love to listen to a lot of radio programs and gospel music stations, but they live in a retirement condo community so no mounting of an outdoor antenna. After searching the net I found a very simple DIY design and was able to build it for under $6. It works great! Sorry no pictures, but here is all that it is:

    A 6 foot long coax cable from the back of the receiver, through the wall, into the ajoining closet. The coax cable connects to a 75 ohm to 300 ohm balun (impedance matching transformer). The two flying leads on the 300 ohm side of the balun are soldered to a 120" long piece of 22 gauge wire that forms a loop that is a 30" high by 30" wide rectangular loop. That loop is tacked to the inside of the closet wall as high as possible.

    I know it's not too exciting but I thought I'd share a small DIY project that exceeded our expectations.
    Craig

    "I used to drive WAY too fast to worry about cholesterol. Now I worry about my blood pressure."

    Why I don't spray in first gear: http://s1138.photobucket.com/albums/...t=100_2585.mp4

  2. #2
    Join Date
    Jun 2008
    Location
    Arizona
    Posts
    1,315

    Default Re: Very simple DIY FM antenna works great!

    This reminds me of the homemade antenna projects I used to do when I was a teenager. Back in those days, the only radio station that played what I wanted to hear (classic rock) was too far away to pick up easily. So I would take my mom's large aluminum mixing bowls and rig up various makeshift parabolic reflector antennas inspired by the big 10' satellite dishes people had in their yards in those days. Some of them actually helped pull in that station!

  3. #3
    Join Date
    Dec 2009
    Location
    Rockford, IL
    Posts
    3,179

    Default Re: Very simple DIY FM antenna works great!

    I remember those 10' satellite dishes!!!! The neighbors directly behind us installed one and I remember my Dad planting 6 tall evergreen bushes so we wouldn't have to look out at that thing everytime we sat down for a meal Suburbia living has it's downsides
    Craig

    "I used to drive WAY too fast to worry about cholesterol. Now I worry about my blood pressure."

    Why I don't spray in first gear: http://s1138.photobucket.com/albums/...t=100_2585.mp4

  4. #4

    Default Re: Very simple DIY FM antenna works great!

    That's a cool solution, and even nicer that it's hidden in a closet. I bet your mom loves that aspect of it!

    Your story reminds me of the antenna my dad built for his radio back when I was a little kid. He made this octagon shaped wheel looking thing wrapped with 30-40 turns of magnet wire. He got the plans for it from an old Short-Wave radio operator.

    He really did a beautiful job on it. He was so mad when he discovered that it wouldn't fit through the Bilco door.

    Measure twice... at least!

    TomZ

  5. #5

    Default Re: Very simple DIY FM antenna works great!

    Quote Originally Posted by PWR RYD View Post
    I remember those 10' satellite dishes!!!! The neighbors directly behind us installed one and I remember my Dad planting 6 tall evergreen bushes so we wouldn't have to look out at that thing everytime we sat down for a meal Suburbia living has it's downsides
    I've got one of those stupid things in my back yard. Maybe this will be the year that I actually find time to take it down and plant a bush to hide the cement footer.

  6. #6
    Join Date
    May 2008
    Location
    wisconsin
    Posts
    3,856

    Default Re: Very simple DIY FM antenna works great!

    The good old days.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	satellite.jpg 
Views:	1115 
Size:	21.1 KB 
ID:	13630  

  7. #7
    Join Date
    Oct 2005
    Location
    'Upstate' NY
    Posts
    1,823
    Blog Entries
    3

    Default Re: Very simple DIY FM antenna works great!

    You are a good son!

    I'm not sure what a balun is, is it this?



    http://www.parts-express.com/pe/show...number=180-010

  8. #8
    Join Date
    Jan 2010
    Location
    North
    Posts
    1,375

    Default Re: Very simple DIY FM antenna works great!

    a Balun is a transformer for converting balanced signal to unbalanced and vice versa.
    Do It Someone Else.

  9. #9
    Join Date
    Dec 2009
    Location
    Rockford, IL
    Posts
    3,179

    Default Re: Very simple DIY FM antenna works great!

    Quote Originally Posted by jclin4 View Post
    You are a good son!

    I'm not sure what a balun is, is it this?



    http://www.parts-express.com/pe/show...number=180-010
    Yes, that is it.
    Craig

    "I used to drive WAY too fast to worry about cholesterol. Now I worry about my blood pressure."

    Why I don't spray in first gear: http://s1138.photobucket.com/albums/...t=100_2585.mp4

  10. #10
    Join Date
    Oct 2008
    Location
    near Rochester, NY
    Posts
    1,755

    Default Re: Very simple DIY FM antenna works great!

    http://imageevent.com/holl_ands/loops/folded

    I made the FM dipole described just below the Ch6 dipoles. This guy knows the NEC4 model and EM radiation in general.

    I'll note that the square design retains the dipole lobes; no reception in the plane of the wall. You can get omni results by using the vertical orientation he shows for the FM model (at the bottom). The 24ga wire design for Ch 9/10is roughly half the size of a similarly optimized FM antenna. Rearrange the square to a vertical dipole pattern of this size and you may find reception improves, especially for stations along the wall.

    HAve fun,
    Frank

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  




Your #1 Source for Audio, Video & Speaker Building Components


Clearance Center
Deal of the Day
New Products




View Our latest
Sales Flyer

Prices Effective
Through 12/31/14


Order our FREE 336 Page Full Color Catalog


Speaker Component Categories

Home Audio Speakers

Professional Audio & Guitar Speakers

Car Audio Speakers

Speaker Buyouts

Measurement & Design Tools

Subwoofer Plate Amplifiers

Full-Range Plate Amplifiers

Crossover Components

Cabinet Hardware & Speaker
Grill Cloth

Speaker Cabinets

Subwoofer System Kits

Speaker Kits

Speaker Repair Parts

Speaker Wire