It is possible, but performance is going to depend on a number of factors that will determine the needed isolation between the to two PAs, i.e. TX freq spacing, TX power, Circulator performance rating, etc. You will want to make sure you have Circulators w/ LPF, (likely double circulators with sizable load resistors) on the PA output of each TX before the duplexer input. To minimize generating an objectionable levels of IM products when both PAs are operating simultaneously, make sure your circulators are well tuned to their operating frequency. You will have check the antenna output (both PAs keyed) with a spectrum analyzer to insure your not generating/radiating IM products up and down the spectrum.
Rob K7EI -----Original Message----- From: n1ofj [mailto:[EMAIL PROTECTED] Sent: Friday, December 19, 2003 7:40 AM To: [email protected] Subject: [Repeater-Builder] use of Bp/Br duplexer as 2 channel combiner Has anyone ever used a Bandpass/reject duplexer as a transmit combiner. As an example, using one port set up as a pass on Frequency A, reject on frequency B, and the other port to reject frequency A and pass Frequency B? Any thoughts on this would be appreciated. Thanks, Dave N1OFJ 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/ 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/
