The notch "generally" will track the pass as it's adjusted, but it's not a fixed-offset kind of thing. If you retune one of the cavities +1 MHz, the notch may move +1.1 MHz, or +0.9 MHz, or ...you get the idea. So, no, you can't just re-tune the pass and assume the notch has followed exactly.
--- Jeff > -----Original Message----- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Ken Arck > Sent: Sunday, April 09, 2006 7:30 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Sinclair Q-201G duplexer > > Hi folks > > I know the "stock" answer, but I'm looking for the non-stock > one :-) (and > yes, I've read the manual!). > > But I was wondering (and checking my rationale here)..... in > many Bp/Br > cavities, the notch tuning actually tunes to a certain freq > above or below > the pass-tuned frequency. Therefore, if moving the duplexer a > meg or two > but you maintain the same offset spacing, can you simply get away with > retuning the pass freq and, all other things being equal > (port impedance, > etc), is that all that is needed? > > Manuals always seem to talk about tuning but rarely (if ever) > REtuning... > > Ken > -------------------------------------------------------------- > ---------------- > President and CTO - Arcom Communications > Makers of the world famous RC210 Repeater Controller and accessories. > http://www.ah6le.net/arcom/index.html > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > > > > > > Yahoo! Groups Links > > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release > Date: 4/8/2006 > > 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/