A bandpass cavity does what its names states - it passes a frequency. If you are installing a bandpass cavity ahead of a receiver preamplifier, then you want to tune it to pass the receiver frequency. A bandpass cavity is NOT a duplexer.
I'm pretty certain that there is information regarding this on the repeater builder's web site. If you are new to repeaters, you really should spend some time browsing the vast amount of information contained on the web site. Chuck WB2EDV ----- Original Message ----- From: "w9mwq" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, December 26, 2004 2:47 PM Subject: [Repeater-Builder] Re: 2 Meter VHF Preamp > > > On these bandpass cavity filters, would the Decibel Products DB4001- > 1 be a good choice to use, and what would be the method of tuning > them? Are they tuned to the transmitter output or the receiver > input? Not at all familiar with tuning duplexers, as this is > something I am now learning to do. Thanks. > > Mathew > >> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
