Re: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-18 Thread Chuck Kelsey
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

Re: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-18 Thread James Adkins
I'll "ditto" what Chuck said. LMR-400 should be avoided like the plague in repeater service. If you're not making your cables out of some type of superflex, try RG-214 with proper gender connectors, you can get BNC connectors for this coax. RG-400 is a good choice for interstage wiring, like exc

Re: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-18 Thread Chuck Kelsey
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" T

RE: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-18 Thread kf0m
Greg: If you are not on the RC210 yahoo group you should join. Earlier in 2009 there were a lot of people having problems with RC210 resets with a few versions of firmware which has sense been resolved. You should check to see if you have one of the unstable versions loaded and then go to either v

RE: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-17 Thread no6b
At 1/17/2010 01:13 PM, you wrote: >Greg, > >Trying to combine both vertical and horizontal separation will not help; the >horizontal will completely swamp the vertical. As soon as you move the >transmit antenna out from directly under the receive antenna, the isolation >decreases dramatically. Ev

RE: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-17 Thread Eric Lemmon
Greg, Trying to combine both vertical and horizontal separation will not help; the horizontal will completely swamp the vertical. As soon as you move the transmit antenna out from directly under the receive antenna, the isolation decreases dramatically. Even a few feet of horizontal displacement

Re: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-17 Thread Chuck Kelsey
Explain your 440 setup and the coverage. Maybe someone can offer some pointers there. Chuck WB2EDV - Original Message - From: "thornwal" To: Sent: Sunday, January 17, 2010 3:12 PM Subject: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire? > > > I have 440 repeater up and ru

Re: [Repeater-Builder] Re: Split Site Via Coax Cables & Wire?

2010-01-17 Thread DCFluX
for 1200' I'd take discriminator audio from the RX and convert it to balanced audio with a transformer or a couple op-amps and send the balanced audio on a pair of cat-5m. power for the RX can be sent back on the other 3 pairs, I'd send 24 or 48V and have a 12V regulator at the other end. COS can