They use BNC's. In my opinion, the best UHF duplexer out there. Chuck WB2EDV
Bob M. wrote: > It was a TxRx 4-can duplexer. The specs were 100dB, > and it made that but just barely (102-103 is what I > measured). 1.1dB passband loss. I could get the model > number, but I believe it's a stock model, just tuned > for the ham band. They use RG142 throughout. The > connectors on the duplexer look like TNC but I didn't > take any apart. These run to ordinary female Ns on the > frame. > > Let's hope the problem is really gone, but I'd have > liked to try to recreate it, just to make sure that it > really was fixed. > > Bob M. > ====== > --- Coy Hilton <[EMAIL PROTECTED]> wrote: > > >>Well Bob I'd bet the problem is gone for good. >>There's nothing like >>having really good feed back from your antenna to >>the area of your >>receiver with out going through the receive side of >>the duplexer. It >>sounds like a little item called a passive repeater, >>think about it. >> >> I'm interested in the 4 can duplexer, I would like >>to know the >>make. Not bad for a 200 watt transmitter. >>AC0Y >> >>--- In [email protected], "Bob M." >><[EMAIL PROTECTED]> >>wrote: >> >>>First, I would like to thank everyone who >> >>responded to >> >>>my original post with suggestions, information, >> >>and >> >>>similar problems. >>> >>>Here's an update to the situation. >>> >>>Late Monday afternoon/evening, the coax/antenna >> >>was >> >>>swept (from the bottom) with a site-master unit >> >>and no >> >>>problem was found. >>> >>>There's an unused 800 MHz vertical antenna mounted >>>near the UHF antenna, on the platform, with coax >>>attached. Apparently the dummy load at the bottom >> >>of >> >>>the coax for that antenna was either missing or >>>defective, so another one was put on. The >> >>repeater's >> >>>desense problem is completely gone now, even with >> >>the >> >>>200w PA and the 17dB gain preamp. >>> >>>I don't know if there was desense immediately >> >>before >> >>>playing with that dummy load, nor if they restored >> >>the >> >>>situation to what it was previously to check if >> >>the >> >>>desense reappeared. For all we know, with the high >>>winds and rain we had Monday, something up at the >>>antenna (the jumper, for example) could have moved >>>enough to _cure_ the problem, even temporarily. >>>Nothing else was done at the site on Monday, but >> >>the >> >>>repeater is working as good as it was when it >> >>first >> >>>went on the air. >>> >>>If the desense condition returns, we'll obviously >> >>have >> >>>to go looking for it again, but maybe a visit to >> >>the >> >>>top of the pole would be in order. >>> >>>Anyway, my search for a circulator is temporarily >> >>on >> >>>hold. Sure, it would be desirable to have one, but >> >>not >> >>>absolutely necessary for proper operation of the >>>repeater. >>> >>>Bob M. > > > > > > __________________________________ > Yahoo! Mail - PC Magazine Editors' Choice 2005 > http://mail.yahoo.com > > > > > > Yahoo! Groups Links > > > > > > > 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/
