Hi Joe, I don't have all the model numbers recorded... so a picture of the unit says a thousand words mucho betta'.
I'll email you a picture to indicate if this is the unit you have... take this off the group. cheers, skipp > Joe <k1ike_m...@...> wrote: > > Hi Skipp, > > The combiner in this rack is a Celwave TJD220-5T and there is another > number on the rack, Model 720160 (forgot where this was located on the > equipment). My goal is to come up with a plan for a 222mhz duplexer for > a friend's linking project. I shouldn't have sold my 222 repeater after > all, but that's the way it always goes. You need something after you > sell it. It looks like there are enough cans to make something work. I > was thinking 2 pass cans and 1 notch can on each side. 6 cans in all, I > just have to experiment with the connecting cable lengths. This will be > a low powered linking repeater, so duplexer losses will not be a big issue. > > We can take it private, but others may be interested? > > 73, Joe, K1ike > > The GLB is in the mail, Priority yesterday 12/30/08 > > skipp025 wrote: > > Hi Joe, > > > > I have a large number of the Securicor, Intek 220MHz ACSB > > trunking combiners removed from service here on the West > > Coast (California). T'was at one time quite the build-out... > > going from Texas up through Alaska. > > > > At first glance it appears least one of almost every antenna > > combiner manufacture produced their own version of the 5 channel > > combiners for the various incarnations of 220MHz Trunking. > > However, there are/were other size trunking systems... I have > > also seen and worked with two and three channel TX combiners. > > > > So I have Wacom, Cellwave, Aerial Systems, RJ, Telewave, Sinclair > > and a few other custom made configurations here. And there are > > different variations of combiner systems made by the various > > manufactures. It's very interesting to see how different people > > accomplished the same task with fairly similar and different > > hardware layouts. > > > > So what is most practical to do with what you have depends on > > what specific hardware you received. In most cases it's well > > worth your time to try and track this stuff down... lots of > > the hardware found in the combiner translates to use in other > > applications. > > > > Specific to the Cellwave hardware you have... depends on what > > you have. Some of the Cavities are set for pre-selection insertion > > loss, some are set for one frequency notch. Some cavities have > > semi fixed loops/probes that are hard to work with... and then > > there's the easily adjusted bottles. > > > > I measured and made actual performance graphs for the Cellwave > > version... so email me direct if you would like to talk more > > about it off the list. > > > > I'm using a number of the original as-built TX Combiners at > > various mountain top sites. They simply needed minor modifications > > and re-tuning. Some of the combiners racks (like a number of > > the Cellwave units I have) include receiver pre-selection. In > > many cases the receiver pre-selection will work for low power > > systems but is really not enough for 2 or more high powered > > transmitters in the typical close spaced Amateur Ap. > > > > The Aerial Systems Square Cavities mentioned in dcflux's post are > > really, really nice units with relatively much high Q compared to > > slightly smaller round cavities. But they are cumbersome to mount > > if you don't have the original mfgrs rack rails. > > > > I can post information and hints here if people are interested > > but it's probably more practical to yak off the list. Please > > feel free to (send food) email me direct. > > > > cheers, > > skipp > > > > skipp025 at yahoo.com > > > > > > > >> Joe <k1ike_mail@> wrote: > >> I have an opportunity to get a combiner/filter panel from a > >> 220-222Mhz ACSSB system that was abandoned years ago. Has > >> anyone experimented with making a 222Mhz duplexer out of > >> the parts in the Celwave rack that was used in this system? > >> 73, Joe, K1ike > >> > > > > > > > > > > ------------------------------------ > > > > > > > > Yahoo! Groups Links > > > > > > > > > > >
