Ok... So I've tuned this duplexer as a notch device. Put a 2 watt handheld into a dummy load and watt meter (not in that order mind you) and it seems to reject the corresponding frequencies. My question now is... Why did my swr jump from 1:1.3 to 1:3. Do I need to re-tweek it? Also I'm noticing a huge power loss when measured before and after the duplexer. Talking 30 watts down to below 10 watts. Any suggestions. Perhaps it is time to check the cables etc? Thanks for all the help in the past. Craig
--- In Repeater-Builder@yahoogroups.com, "Gary Schafer" <[EMAIL PROTECTED]> wrote: > > Lots of the small mobile duplexers (notch type) have fixed capacitors inside > and you can only adjust the cavity tuning, which tunes the notch. > > This type duplexer is limited in how far from the design frequency you can > tune it as the capacitors are fixed. The cavities will tune but the loss > goes. > > 73 > Gary K4FMX > > > -----Original Message----- > > From: Repeater-Builder@yahoogroups.com [mailto:Repeater- > > [EMAIL PROTECTED] On Behalf Of fxbuilder > > Sent: Friday, February 16, 2007 5:09 PM > > To: Repeater-Builder@yahoogroups.com > > Subject: [Repeater-Builder] Re: Band Pass Duplexer Tuning > > > > I emailed the place I bought it from and that is what I was told. > > Band Pass. No caps on it for notch tuning as on celwave. Am I missing > > something here? > > Craig > > > > > > > > > > --- In Repeater-Builder@yahoogroups.com, Ken Arck <ah6le@> wrote: > > > > > > At 01:53 PM 2/16/2007, you wrote: > > > > > > >There is a great article on this site about tuning a notch duplexer by > > > >Kevin. Can similar methods be used for tuning a mobile 6 can band > > > >pass duplexer? Is there an article that I missed that explains it as > > > >easily? I need to re-tune and could use the help. I think I know how > > > >but thought I'd check. > > > > > > <----Is there such a thing??? > > > > > > Ken > > > > > -------------------------------------------------------------------------- > > ---- > > > President and CTO - Arcom Communications > > > Makers of the world famous RC210 Repeater Controller and accessories. > > > http://www.arcomcontrollers.com/ > > > Authorized Dealers for Kenwood and Telewave and > > > we offer complete repeater packages! > > > AH6LE/R - IRLP Node 3000 > > > http://www.irlp.net > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > >
