well then how about anyone who builds cables post the type of duplexer, type of probes, and cable length for whatever frequency
after a while there would be a goood set of 'start here' figures for all ----- Original Message ----- From: Nate Duehr To: [email protected] Sent: Thursday, July 24, 2008 4:10 PM Subject: Re: [Repeater-Builder] Duplexer cables - Data Base Idea Shanon KA8SPW wrote: > Here is an idea. > > How about those of us who have repeaters with duplexers take > measurements and post them. 1. I'm not disconnecting all my working system's cables to measure things. Messing with cables and connectors is a sure-fire way to introduce new problems. 2. You got $400, I'll drive to all my sites and back. Gas is high, and one site is more than 100 miles round-trip. 3. They make test gear for a reason. Anyone can sit at a bench and get the cable lengths right on a duplexer with trial-and-error. 4. Too many variables, unless you were only talking about a specific duplexer brand. The loops inside the cans are part of the electrical length of the cables. And different velocity factor cables even with supposedly the SAME NUMBER TYPE are out there. 5. Most good quality duplexers on the used market for VHF and UHF start life with cable lengths that are "close enough" for most ham applications, unless you're pulling some strange stuff in from way out of band or you're at the "wrong end" of the band. You'll see if your duplexer is whacked the first time you go to tune it, otherwise -- leave the cables alone. Oh yeah... the main reason: Mine work already. (I know, I know... that's not nice, but I do have other things to do.) There's probably more, but that about covers why I don't think a lot of people will participate in such a project. Nate WY0X No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.5/1570 - Release Date: 7/24/2008 6:59 AM
