I will look to see if DB/andrew/ who ever owns them now, still make loops for these. I have considered fabricating some spare loops just to have on hand.
we have 4 pass cans at the site in a cabinet that are just waiting to have some vari caps installed to make them into pass/reject cans. as far as making these into pass/reject, i am not sure how you modify the loops. Unless you can add a vari cap on the ground side of the loop. --- In [email protected], "skipp025" <skipp...@...> wrote: > > The Band-Pass, Band-Reject function can be done with one and > two ports on a proper size cavity. > > If you have one port per "bottle" (cavity), you should research > to see if a BpBr retro-fit is available from the mfgr or can > be made with minimal grief. > > It's my opinion that some reduced physical size "lumped parts" constructed > cavities don't easily make decent BpBR candidates > but exceptions to every rule seem to often pop up in my world. > In many examples.... something that works at best OK is better > than nada (nothing). > > I have seen people selling retro-fit BpBr Probe and Coax Harness > Kit's (new old stock type) on Ebay. The price wasn't super great > but at least they are available. You can also contact Sinclair > for replacement kits as I have heard more than one person report > back good results obtaining kits and parts, myself included. > > You can also make your own... while I don't have the specific > to your assembly information right here... I will say I have seen > a wealth of information on this subject on the web in places like > the Repeater Builder Web Page. > > I have some notes and drawings regarding BpBr Probes, but not > a lot of those are related to your specific Sinclair model. > > And I would mention that making a Notch-Pass Duplexer is not > a bad idea... If you plan to put your repeater in a location > without a lot of nearby frequency adjacent RF, you might be > impressed and pleased with the Notch-Pass performance. > > cheers, > s. >
