1/2" Heliax would work well. You don't have a very long run. Usually can be found pretty reasonable.
Did you kill the TX while listening to a weak signal on the local speaker? That's the cheap and dirty desense check. If you kill the TX and the receive signal improves, you know you have desense. Chuck WB2EDV ----- Original Message ----- From: "thornwal" <[email protected]> To: <[email protected]> Sent: Monday, January 18, 2010 11:03 AM Subject: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire? > > > I hear it better than I get into it. With the IRLP node on 2m with less > power in the same spots the signal is full quieting, much better compared > to the repeater. I guess it could be a combination of things, trees, coax, > height, etc. > > What coax is best without breaking the bank, hihi? > > > --Greg KD3SU > > > > --- In [email protected], "Chuck Kelsey" <wb2...@...> > wrote: >> >> The first "red flag" is the LMR400 cable which is notorious for causing >> desense in duplex service. Can you hear the repeater OK but have >> difficulty >> getting in? >> >> Also, getting above the tree level can make a big difference on UHF. >> >> Chuck >> WB2EDV >> >> >> >> >> ----- Original Message ----- >> From: "thornwal" <th...@...> >> To: <[email protected]> >> Sent: Monday, January 18, 2010 8:19 AM >> Subject: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire? >> >> >> > >> > >> > --- In [email protected], "Chuck Kelsey" <wb2edv@> >> > wrote: >> >> >> >> Explain your 440 setup and the coverage. Maybe someone can offer some >> >> pointers there. >> >> >> >> Chuck >> >> WB2EDV >> >> >> > >> > >> > The 440 repeater is a Icom FR-4000, with a Sinclair duplexer (4 >> > cavities). >> > I have about 50 ft of LMR-400 coax running to a vertical ant (9.8 db) >> > on >> > at ~25ft. I had a 25db preamp on it seemed to help a little. Freq is >> > 447.9500+ MHz, ERP ~80 Watts, HAAT ~600 Feet, @1,200 ft elevation. My >> > 2m >> > IRLP node @ 5 or 20w seems to do better than the repeater even though I >> > have it on a dual band vert at a lower elevation, I figured it was the >> > 440 >> > band. >> > >> > I have RC210 controller on it for the IRLP node (multiple ports) but it >> > keeps resetting and has locked up a few times (PTT on!) so that's why I >> > put the IRLP on 2m simplex. Not sure why it locks up, maybe RF? It's >> > still >> > resets every couple of days even though it's not used much. >> > >> > Coverage map: >> > http://k5ehx.net/repeaters/qrepeater.php?id=15838 >> > >> > Thanks, >> > >> > --Greg >> > >> > >> > >> > >> > >> > ------------------------------------ >> > >> > >> > >> > Yahoo! Groups Links >> > >> > >> > >> >> >> -------------------------------------------------------------------------------- >> >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 9.0.725 / Virus Database: 270.14.148/2629 - Release Date: >> 01/17/10 >> 14:35:00 >> > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.730 / Virus Database: 270.14.149/2630 - Release Date: 01/18/10 02:35:00
