Hi Dependant on the typr of filtering used .The standard is either a cavity or a 2nd harmonic filter which is very small in size.1" by 1 " .
Regards Brad ZS5WT --- skipp025 <[EMAIL PROTECTED]> wrote: > The obvious answer would be the amount of > energy coupled to the two-loop bp cavity > output port should be minimal at the second > harmonic. > > A lot of people assume the isolator/circulator > is an automatic serious level 2nd Harmonic > generator. I've not found that to be the case. > > Places to be carefull: When using notch-pass > duplexing and some of the newer style combiners > where notching is the dominant portion of the > system and preselection and/or bandpass filters > are/is less applied. > > **** > > I have three different brand Trunking Combiners > side by side: Telewave (qty of 2), Cellwave (qty > of 2) & Wacom (qty of 1). All are unmodified > original as-built combiner units. > > Not a low pass filter in the bunch plus they > are all full duplex combiners (receive and > transmit on the same antenna). Same with both > the original Microwave Associates and Antenna > Specialist units in the next room. > > So the answer in my mind is yes I would trust > a trailing passband cavity (properly configured) > to do the job. So does/did the above named > companies*. > > cheers > skipp > > *rip wacom > > > "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > > I trust that if there is no Low-Pass filter > > at the isolator output, a passband cavity > > would do the job? > > LJ > > > > > > > > Yahoo! Groups Links > > > [EMAIL PROTECTED] > > > > > __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/ 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/