Mike, >From looking at the pictures I'd say that it is a similar duplexer as the WACOM type but instead of using stubs they use capacitors in the loop. Likely similar to the Sinclair models. Tuning is probably the same procedure as the WAYCOM duplexer but you adjust the capacitor instead of the stub.
I hazard a guess that the capacitor tunes the reject frequency and the tuning rod the pass frequency. If you have the proper test equipment, or know somebody who has, it would not be hard to find it out by looking at the pass/reject curve while making a small adjustment on the capacitor. Good luck es 73, Tony VE3DWI ************************************ Greetings all, My club has a spare set up duplexers that we want to have ready for use in the event we ever need them. Unfortunately, we don't know what they are and they have no markings on them to help us find out who the manufacturer is. They are tuned for 2 meters (146.25/85) each can is just under 8 inches in diameter and about 21 inches to the top of the can. They do not have capacitive stubs like the WACOM duplexers, but each can has a small box on top with a screwdriver adjustment (I assume it's a capacitor) labeled either 'High Freq Pass' or 'Low Freq Pass'. I've uploaded pictures to: http://community.webshots.com/user/wa4ort. Can anybody identify them for us? Next question... where can I find a manual so I can tune them? Thanks, -- de WM4B Mike Kathleen, GA Yahoo! Groups Links 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/
