I suspect that he has notch cavity resonators. Each can is about two feet tall, more or less. So, while eight of them take up some space, they are not likely as large as you envision.
Chuck WB2EDV ----- Original Message ----- From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, October 02, 2008 7:14 PM Subject: Re: [Repeater-Builder] LMR-400 Cable Tom, With 65 feet of cable, your feed line is very close to a resonant length at 6 m. Actually about 3 wavelengths. If you have enough extra coax length, try winding some of it into a coil and see if that reduces your desense problem. Also, make sure your antenna is a good impedance match to your transmitter/duplexer impedance. A 6-cavity duplexer on 6 m has to be a HUGE duplexer and I suspect that's where your problem is. You have to have a VERY precisely tuned duplexer that provides at least 85 dB of isolation between the XMTR and the RCVR. 73, Dick W1NMZ
