Tom The 4" cable is a 1/4 WL and the O.C. stub parallel resonates the loop inside the cavity to create a broad S.C. a 1/4 WL away fron the tee connector on the main line.
Allan Crites WA9ZZU --- On Mon, 2/1/10, kd4wov <[email protected]> wrote: > From: kd4wov <[email protected]> > Subject: [Repeater-Builder] Re: length of cables for notch cans > To: [email protected] > Date: Monday, February 1, 2010, 7:55 AM > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --- In Repeater-Builder@ > yahoogroups. com, "skipp025" <skipp...@.. > .> wrote: > > > Maybe I wasn't clear in (more than one of :-) my > last > > > posts... let's try again. > > > > > > Where exactly do the coax harness T-fittings mount? > Are > > > they right down on the top of the cavity screwed down > to > > > the factory cavity coax port/probe.. . or is the > T-fitting > > > for a specific single cavity (for the coax harness) > spaced up > > > and away from the top of the cavity by a short section > of > > > coax? > > > > > > Do you have the original cables used with those > cavities > > > still and do you know what lengths went at certain > locations? > > > > > > Your turn, > > > > > > _... _._ > > > > > > > sorry, i guess i missed that. the tee fitting is UHF type, > mounted on the loop. I did have the harness, for these and > they were in a notch configuration. 2 cans connacted to a > tee at one end and a 6" open stub on the other. the > cable between cans, and the last tee was 4" of RG8 > sized DB cable. I assume the stub was for harmonic > suppresion. > > > > I have several of these that were taken out of service. > these were on old micor stations and were installed when the > micors were installed as far as i can tell. > > > > hope that helps. > > > > de kd4wov tom > > > > > > > > > > > > > > > > > > > > > > > > > >
