What you have is a sort of band pass/reject configuration. The cavities with an in and out (two slugs) are pass cavities, the cavities with only one slug are reject cavities. The dulpexer can be re-configured to work as a notch duplexer, with 3 cavities in each side. You would have to check the coils, you will need 3 short, and 3 long. (I think that I may have some extra coils). One side will require 3 t's on top of the cavities, the other side will have the t's mounted with a barrel on top of a 1/4 wave drop cable. If you are interested, I can supply the coax dirgams for 147.00 mhz. which should work from 146/148. they will be a bit longer for the 145 band . Thanks, John Elston, W8JDE ----- Original Message ----- From: "doug" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, December 31, 2003 2:58 PM Subject: [Repeater-Builder] Wierd DB Cavities.... "BEST OFFER"
> > if you point your browser here: > > http://members.aol.com/milguy11/cavity1.jpg > > and > > http://members.aol.com/milguy11/cavity2.jpg > > you can see the pictures that i am discussing below. > > what you see here are six VHF cavities. > > > don't ask me who made them, i just don't know... from the color, i suspect > they are DB. > > > four of these appear to be some kind of pass cavity. > > the other two have only a single coaxial plug on them.... so i dunno about > those. > > the second picture is a screen shot from my analyzer... showing two of the > cavities "in series" and the resulting display.... > > anyone want these? please make a sane offer.... i have a figure in mind, > we'll see if someone can get close. > > shipping should be reasonable via FEDEX GROUND ($30 or so) > > email me OFF THE LIST ... please > > > doug > kc5bmj > > > > > > > > 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/ > > > 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/
