Jeff, To really give advice here what HAAT is your antenna. At 100 ft AGL 14 miles is about the expected range. Still depends on your terrain.
As for feedline I think the LMR400 is a double shielded coax with 2 different shield materials. It has been found these generate noise on the tx side from the high RF. This would affect rcv. Probably good for rcv, but my standard is have nothing in a repeater that causes problems. I use either RG214 double shielded RG8 size and also 1/4" heliax. Both give good shielding and with short pieces little loss. Also RG142 which is a double shielded RG58 size cable often silver shield. Motorola and others use this inside their equipment. Never use double shielded cable with the 2 shields of different material like 9913 or some of the LMR stuff. Again the tx high RF will generate noise. 73, ron, n9ee/r >From: jstechnicalservice <[EMAIL PROTECTED]> >Date: 2008/05/08 Thu PM 12:30:30 CDT >To: [email protected] >Subject: [Repeater-Builder] Best coax for short jumpers in repeater cabinet? > >I was hoping to get some opinions on the best coax to make jumpers for >internal connections on a 152 Mhz public safety repeater. I'm currently >using LMR400 and we can hit the repeater consistantly with a 5 watt >handheld at 14 miles. The problem is we sometimes need around 15 to 16. >I was hoping to improve performance as much as possible. Thanks > >Jeff Skaggs >Concord-Greene FD > > > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
