About 4 years. This is the tower in my backyard. Its Rohn25g 72ft+19ft mastpipe. One correction, its actually LMR400UF(ultra-flex). Gotta do the rotor loop!
Mike Perryman wrote: > Jay, > I am curious how long the LMR-400 (feed-line up the tower)has been in > service? > > mike > > -----Original Message----- > From: [email protected] > [mailto:[EMAIL PROTECTED] Behalf Of Jay Urish > Sent: Friday, January 06, 2006 11:52 AM > To: [email protected] > Subject: Re: [Repeater-Builder] Repeater Assistance in Michigan. > > > Just as a point of reference, I have a UHF machine Moto MSF5000 pumping > out 90watts going up 170 ft of LMR400 coax and I get great results. To > make it more interesting, I have a comet duplexer at the feedpoint (in > my station) so I can use the VHF part of the fiberglass dual band > wonderstick as RX for my vhf repeater till I get a duplexer that will > tune to 144.630(my DB duplexer wont) > > > [EMAIL PROTECTED] wrote: > >>At 1/6/2006 01:34, you wrote: >> >> >>>Bob, >>> >>>Sorry if I didn't get it right but now I am really confused .... and open > > to > >>>learn. >>> >>><Snip and paste> >>> >>>>Shielding percentage of the antenna feedline has nothing to do with > > duplex > >>>>suitability. >>> >>>Somewhere I am missing something.... If shielding doesn't play a part in > > the > >>>suitability factor of selecting feedlines, why do we use hardline (other >>>than less loss) or double shielded jumpers for connections etc.in a duplex >>>operation? >> >> >>Double-shielded jumpers are needed where isolation is needed between TX & >>RX (duplexer jumpers & RX/TX connections to the duplexer). From the >>duplexer antenna connector onward to the antenna, the TX & RX are already >>combined. What's important there is linearity. RG-214 is > > double-shielded, > >>but it's also silver plated (or supposed to be, some '214-type' cable >>isn't). Hardline has a solid outer conductor with no intermittent/point >>contacts to generate IMD, so it's also extremely linear. >> >>Bob NO6B >> >> >> >> >> >> >> >>Yahoo! Groups Links >> >> >> >> >> >> >> > > -- > Jay Urish Systems Engineer > Unixwolf Enterprises LLC. > http://www.unixwolf.net > 972.691.0125 972.965.6229 > > > > > > Yahoo! Groups Links > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > -- Jay Urish Systems Engineer Unixwolf Enterprises LLC. http://www.unixwolf.net 972.691.0125 972.965.6229 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
