Occasionally I am asked, "What type of antenna should I use?" An antenna can be as simple as 10 feet of wire stretched out on the floor, behind the furniture. If you want superior reception a high and long out door antenna may be for you. Below is an exert from a National communications receiver manual. The length L of figure 2-3 Doublet (dipole) is calculated by 468/frequency in Megahertz. You can use the 300 ohm twin lead wire sometimes available from Radioshack, Lowe's or Home Depot.
A commercially available Doublet example is the EAVES TWIN "Eavesdropper". It is a complete outdoor antenna with Twin Lead wire, Traps for multiple bands & frequencies and insulators. It is currently selling for about $100 from AES . AES and other places provide additional antennas including indoor loops, and outdoor vertical whip with an indoor control box. This is not an endorsement for any particular produce or vendor.
For my shop antenna I have a "Single Wire Type". A simple random length (about 70-90 feet) of wire vertically shot up into the tree tops with a sling shot and a fishing reel. It works great.
I pulled a length of green weed whacker line up in to the trees with the fishing line from a reel. Then attached a spool of surplus wire from a Hamfest. Then used the green trimmer line to pull the wire up into the tree top. In the shop I have an old time science fair SPDT knife switch. The knife is connected to the antenna, one connector contact side to the lead wire attached to the radio and the other connection with a wire to ground. I ground the antenna when not in use. The surplus wire cost me about 5 bucks, the knife switch I had laying around, Walmart sling shot $9 and the reel about $6.
Some radios incorporate a twin lead dipole antenna stapled inside the wooden cabinets. Some bakelite and plastic radios also have a dipole antenna. But an external antenna that can be rotated and moved for better reception is sometimes desirable or needed.
These antenna are easy to make if you are handy with a soldering iron. Sometimes purchasing these antenna pre made is much less complicated and sometimes just as economical. Finding twin lead wire in short lengths can be nearly impossible. Below are examples of where to buy a simple Twin lead Dipole FM antenna. Position it for best reception of your desired radio station.
Banana Jacks fit nicely into the European style radio antenna terminals.
135,912 unique web site visitors (14,499,000 hits) from October 2004 through August 2011.
Copyright © 2004 - 2012. All rights reserved.