Re: [Repeater-Builder] cp70-422n

[Ian Wells]

http://www2.rfsworld.com/RFS_Edition3/pdfs/Duplexers_755-776.pdf   Thank You, Ian Wells, Kerinvale Comaudio, www.kerinvalecomaudio.com.au   -------Original Message-------   From: Ellen Engle Date: 05/06/06 22:51:11 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] cp70-422n   Ian,   Interestingly the RF Solutions web site does not list the insertion loss for the CP 70 series duplexers.  Looking further thru the pdf I find that the Cp145 series at 144-174 has a 2 dB insertion loss.  Even assuming 3dB loss in the cavities you have what appears to be excessive loss, but you do not say how the measurements were taken.    Was the duplexer connected to the antenna or a dummy load?  Using a dummy load will eliminate any reflected power from the antenna from affecting your measurement.   Milt N3LTQ         ----- Original Message ----- From: Ian Wells To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 06, 2006 6:00 AM Subject: [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 78.1375mhz and only 7-8 watts coming out the antenna .Rx frequency is 80.6375mhz .I t was tuned up by a firm here in queensland   Thank You, Ian Wells, Kerinvale Comaudio, www.kerinvalecomaudio.com.au   No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.4/332 - Release Date: 5/4/06   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.