Hi Bryan, Tuning (I'll assume you mean adjusting length) is not required. All RX's offered have similar lengths of lead material @ 1/4lambda. One OEM to another may be slightly different depending on their particular RF front end.
This implies those frequencies near the middle of the range will be closer (hint hint) to maximum gain (sensitivity), offering the most headroom. A proper (read rigorous) range test regime will determine whether indeed you have adequate headroom for that particular installation. Quoting Bryan Becker <[EMAIL PROTECTED]>: > > Simon, > > Is there an easy way to tune your antenna length, once you have installed > your RX in your model? > > --Bryan > > -----Original Message----- > From: Simon Van Leeuwen [mailto:[EMAIL PROTECTED] > Sent: Friday, August 13, 2004 1:34 PM > To: Jared > Cc: [EMAIL PROTECTED] > Subject: RE: [RCSE] Antenna Info > > > Just to be clear here, longer is not better. Take 72MHZ, a frequency that is > resonant at ~4 meters. This equals lambda, therefore 1/4lambda is ~1 meter. > > In order for an antenna to be resonant, it must be close to these values in > length. changes in length either way (longer or shroter) produce the same > losses. > > Quoting Jared <[EMAIL PROTECTED]>: > > > Thanks for everyone's replies! I think I'm going to do a little more > > digging about building antennas before I start on this. > > > > Bill - the only way that I could see to make a longer antenna less > effective > > than a shorter one is to have it tuned out of the wavelength...or to have > a > > unidirectional antenna pointed the wrong way ;) But I do agree that in > > general longer = better. > > > > Again thanks to everyone for their replies! > > > > Jared > > > > -----Original Message----- > > From: Bill Swingle [mailto:[EMAIL PROTECTED] > > Sent: Friday, August 13, 2004 1:50 PM > > To: Albert E. Wedworth; Jared; [EMAIL PROTECTED] > > Cc: [EMAIL PROTECTED] > > Subject: Re: [RCSE] Antenna Info > > > > >>I have always had great sucess with R/C Direct products.. > > > > > > Please understand; I was not commenting on R/C Direct products > specifically. > > > > But, in my experience. Most any antenna designed to be shorter than the > > factory monopole will Decrease signal. The R/C site agrees with this and > > claims a minimum range reduction. No surprise here. > > > > I was merely trying to headoff the folks who have in the past touted a few > > antennas that are better than stock. It was just sales baloney and I'd > hate > > for folks to be misled again. Smaller equals worser; doesn't have to be > that > > way. But, that's just how it tends to be. I'd love to find an exception. > > > > Bill Swingle > > > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" > and > > "unsubscribe" requests to [EMAIL PROTECTED] Please note that > > subscribe and unsubscribe messages must be sent in text only format with > > MIME turned off. > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" > and > > "unsubscribe" requests to [EMAIL PROTECTED] Please note that > > subscribe and unsubscribe messages must be sent in text only format with > MIME > > turned off. > > > > > Radius Systems > Cogito Ergo Zoom > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and > "unsubscribe" requests to [EMAIL PROTECTED] Please note that > subscribe and unsubscribe messages must be sent in text only format with > MIME turned off. > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and > "unsubscribe" requests to [EMAIL PROTECTED] Please note that > subscribe and unsubscribe messages must be sent in text only format with MIME > turned off. > Radius Systems Cogito Ergo Zoom RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
