Laryn. The best way to do it is to install a multicoupler, tuned to your simplex frequency 446.925 between the duplexer and the antenna. The multicoupler has a frequency seperation of at least 1 MHz so it will not interfere with the 452/458 MHz frequencies. Insertion loss on 446 will be approximately 3 db. The following is a line drawing attempt:
Duplexer ----- multicoupler ----- Antenna | | | 452tx 458rx 446.925 tr A Sinclair multicoupler model C3037 could cost (used) about $300- 400USD, has type N female connectors on all 3 ports. The ports are Antenna In, Feedthrough out, equipment in/out. Specifications can be found at: http://www.sinctech.com/catalog/resources/pdf/C3037-DI.pdf That will do the job properly and should not affect the commercial system. It also assumes the commercial antenna works at 446 MHz as well. Eric Meth - ve3ei Niagara on the Lake, ON CANADA > Hmmmm.... This answer is intriguing, and got me thinking. If I'd > want to add a simplex base on 446.925mc to an antenna system now > supporting a repeater on 452.800tx/457.800rx, what is the best way to > do that? The repeater has a TxRx 4 cavity duplexer on it. > > Thanks in advance. > > Laryn K8TVZ 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/
