It depemds on the size of the cavities. I have used 8 inch cans on both DB and Wacom duplexers with excellent luck at 75 watts. The 7 inch cans in my Sinclair duplexers also work well to the 40 watt level. These are all 4 cavity duplexers.
73 - Jim W5ZIT --- On Sat, 7/19/08, Ralph Mowery <[EMAIL PROTECTED]> wrote: From: Ralph Mowery <[EMAIL PROTECTED]> Subject: Re: [Repeater-Builder] Duplexer Tuning / Desense To: Repeater-Builder@yahoogroups.com Date: Saturday, July 19, 2008, 9:05 AM Depending on the sensitivity and power level, a 4 cavity duplexer is just barley enough for a 600 KHz spacing on 2 meters.