--- Alan Beck <[EMAIL PROTECTED]> wrote: > Basic question > > > > Why is it that my radios are 50 ohms and the > impedance at the feed point at > the antenna (pure dipole) is 70 ohms. > > Am I mistooken > > Alan >
Yes Alan, You are mistaken. As you will find from the many different responses (with opinions) this question will surely generate... this is not a "basic" question. There is a very acceptable range of impedance (ohms) that will work just fine for you. If you want to split hairs (or ohms) then get an SWR meter or some form of analyzer and either adjust the length of your antenna to something near 50 ohms or use a tuner that can match the feedline and the antenna to 50 ohms. There are several possible ways to transfer power to an antenna in a ratio of 50 volts per ampere of current that many transmitters like to see. Transmitters manufacturers have chosen 50 ohms based on the most commercially available and popular transmission lines on the market with consideration to the many different antenna systems in use other than just a theoretical dipole. Mike Mertes / KZ5M ____________________________________________________________________________________ Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html ______________________________________________________________ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
