You could try a diplexer to split the dual bander and then feed that in to 2 of the 3 ports of a triplexer. Then feed the 1.2 in to the 3rd port of the triplexer also. Take the one antenna feed out of that to the SB-97. At least it is worth a try... Carl
--- On Wed, 10/14/09, storkus <stor...@yahoo.com> wrote: > From: storkus <stor...@yahoo.com> > Subject: [DSTAR_DIGITAL] Triband Mobile Installation Recommendation > To: dstar_digital@yahoogroups.com > Date: Wednesday, October 14, 2009, 12:07 PM > I've been Googling everywhere and > have come up empty, so while this isn't technically a D-STAR > specific problem, I have a hard time believing it hasn't > come up before (or will again). > > I got my hands on a Comet SB-97 tri-bander mobile antenna > at a really good price. The trouble is, I have > realized, how to get 23cm in there from a separate > radio. After sleeping on this, I see 2 options: > > 1. Use a triplexer from Comet or Diamond. This has > the advantage of a single-antenna, clean install. But > I can't for the life of me figure out how you feed the VHF > and 70cm ports from a single radio: will using a T-adapter > screw up the impedance or does that matter since the ports > will only pass their own band? And is 55db separation > REALLY enough? > > 2. Go buy a separate antenna: maybe an HV7A or something > that does 6m and below as well. The advantage is no > worries about a *plexer, but the disadvantages are A. > screwed up rad pattern, B. much more RF into the 23cm > antenna (which would have my IC-T81A on it until I could > afford an ID-1), and C. probably cost more. > > So I refer to the elmers here; hopefully at least some of > you have done this commercially as well. > > Thanks! > > Mike N7MSD > > P.S. Existing radios: ID-800H, IC-91AD, IC-T81A (23cm + > 6M); future radio possibilities: ID-1, IC-7000, > IC-9600(?!?), Alinco DJ-G7 > > > > > ------------------------------------ > > Please TRIM your replies or set your email program not to > include the original message in reply unless needed > for clarity. ThanksYahoo! Groups Links > > > mailto:dstar_digital-fullfeatu...@yahoogroups.com > > >
