Using LMR400 will cause you problems in duplex service - use Heliax instead.
Chuck WB2EDV ----- Original Message ----- From: Aisen Lopez To: [email protected] Sent: Wednesday, June 17, 2009 8:41 PM Subject: [Repeater-Builder] Need tips for repeater performance Hello everybody: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. The Duplexer is pre tuned to my freq. (458.0 repeater RX / 453.0 repeater TX). The duplexer is connected to the radios (my repeater is built out of two Motorola M120's) using RG-58 jumpers of about 24 inches long. Could that be affecting performance? When I check the TX power thru the duplexer I'm getting about 10W yet the TX radio is programmed for 30W. I know that I'll loose some power with the duplexer, but seems to me that I'm loosing too much. SWR won't go below 2.1 no matter how much I adjust the antenna bays. So, what could be done? I imagine that swapping the RG-8 for the LMR-400 will help but I still wonder if that would be enough. Any help will be greatly appreciated. Aisen
