Sure, a UHF isolator will not protect the transmitter from VHF transmitter  
junk. But isn't the flip side that out of band VHF junk is less likely to  
produce UHF transmitter intermod than in band transmitter junk? And also, while 
 a 
VHF band pass cavity might do its job resisting unwanted in band stuff,  
doesn't this cavity still easily pass undesired junk at frequency  multiples?
 
 
 
 
In a message dated 7/1/2007 8:49:50 P.M. Pacific Daylight Time,  
[EMAIL PROTECTED] writes:

As an  example of the limitations of an isolator, a UHF isolator on a UHF
repeater  isn't going to isolate your PA very well from highband signals
coming down  the line. A bandpass cavity between the isolator and the
duplexer  will.








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