RE: [Repeater-Builder] cp70-422n

[Eric Lemmon]

Ian,   The RFS/Celwave CP70-422N duplexer is a good product, but you might contact Celwave regarding the 2.5 MHz split you're using.  Some duplexer designs don't necessarily work better with wider splits.  The CP70 duplexer is specified for a 600 kHz split, and its loop settings might not be optimum for a 2.5 MHz split.  Check with Celwave Tech Support for a definitive answer.   Keep in mind that TX power measured into a resistive (dummy) load can be quite different when measured into a reactive (duplexer) load.  Depending upon the make and model of your PA, it may be a good idea to experiment with different jumper cable lengths between the PA and the TX input on the duplexer, or install an impedance matching device (Z-matcher) at the PA output.   73, Eric Lemmon WB6FLY From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Ian Wells Sent: Saturday, May 06, 2006 3:00 AM To: Repeater-Builder@yahoogroups.com Subject: [Norton AntiSpam] [Repeater-Builder] cp70-422n  Hi guys.  I have the above diplexer and I am concerned about the amount of power loss I am getting.    I have 18watts going into the tx port on 78.1375 MHz and only 7-8 watts coming out the antenna .  Rx frequency is 80.6375 MHz.  It was tuned up by a firm here in Queensland   Thank You, Ian Wells, Kerinvale Comaudio, www.kerinvalecomaudio.com.au   YAHOO! GROUPS LINKS  Visit your group "Repeater-Builder" on the web.    To unsubscribe from this group, send an email to:  [EMAIL PROTECTED]    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.