Larry is correct. My own personal hope and desire is that there will NOT be other users. Call me greedy, I suppose, but the less RF at the site, the better.
However, the guy that posted the original question certainly needs to consider the possibilities. (Sorry, don't remember his name - short memory.) Chuck WB2EDV ----- Original Message ----- From: Larry Horlick To: [email protected] Sent: Wednesday, June 23, 2010 10:00 AM Subject: Re: [Repeater-Builder] Re: Antenna Experience Needed! Do you expect to EVER allow other, non-ham users, to multi-couple to this antenna? Plan carefully. If you anticipate to share, then the bandwidth become very important. For example, a Sinclair 210C Series antenna has a 36 mHz, 1.5:1 VSWR bandwidth, essentially covering the whole VHF high band. A Sinclair 222/224 Series has a 10 mHz 1.5:1 VSWR bandwidth. A Sinclair 229 has a 6 mHz, 1.5:1 VSWR bandwidth. UHF follows a similar set of numbers. If you expect to never allow other users on the antenna, then my comments are irrelevant. lh On Wed, Jun 23, 2010 at 9:36 AM, Chuck Kelsey <[email protected]> wrote: I'm assuming you mean the section of the particular band that a particular model will cover. 'Most' folded dipole arrays and collinear fiberglass manufacturers have models that cover the entire ham band in question, and then some. Chuck WB2EDV ----- Original Message ----- From: Larry Horlick To: [email protected] Sent: Wednesday, June 23, 2010 9:17 AM Subject: Re: [Repeater-Builder] Re: Antenna Experience Needed! Keep in mind the bandwidth of the antenna. lh On Wed, Jun 23, 2010 at 9:09 AM, Sid <[email protected]> wrote: My choice would be the DB-224 type. Sid WA4VBC --- In [email protected], "Chuck Kelsey" <wb2...@...> wrote: > > My vote would be for folded dipole arrays. Sinclair, Comprod, Telewave and > Andrew make good ones. I have seen far too many failures with fiberglass > collinear antennas - lighting and particularly internal failure causing > untold noise generation to the repeater itself as well as to every radio > service nearby. I've never seen a fiberglass one that stood a direct hit but > have seen folded dipoles that did. I'd say at least a 3:1 failure rate, > maybe higher. That said, any can fail. > > Chuck > WB2EDV > > > > >> > >> We will be mounting 2 meter, 220, and a 440 repeater antennas. > >> > >> 1: > >> What do you recommend between a choice of either RFS or Telewave > >> Superstation Master Type or DB224E Dipole type for top mounting? > >> > >> > -------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.829 / Virus Database: 271.1.1/2957 - Release Date: 06/23/10 02:36:00 ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.829 / Virus Database: 271.1.1/2957 - Release Date: 06/23/10 02:36:00
