Dual ports are not required for BpBr cavity probes. The decreased notch depth is probably due to the lower Q of the smaller cavities... 4 or 5 inches.
Telewave does the same single port function without the reactance rods. Their probe construction sets up the same end result with less physical hardware. Sinclair has a newer generation one hole cavity port with two and three coax fittings on it. Another means to and end... cheers skipp ps: "fairly old...", "made in the 80's"..? > "Paul Finch" <[EMAIL PROTECTED]> wrote: > Hello, > > that is one of Lloyd Alcorn's marvels. He showed that design to me a long > time ago, it is BpBr, between the notch and the pass you should have a > really good duplexer. > > Paul > > -----Original Message----- > From: Ken Arck [mailto:[EMAIL PROTECTED] > Sent: Thursday, August 05, 2004 2:54 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Speaking of Wacom WP-678 > I've got a fairly old one (I think it was manufactured in the early 80's). > It claims to be a BP/BR one (the model tag says so), yet it only has one > port per cavity. It also has an adjustable (what I think is) plexiglas rod > held in place by hose clamps, in addition to the center tuning adjust. And > the harness is more like a notch only type as well, as each cavity is T'd, > not "in series" with the next one in that leg. I've *never* been able to > get a good, deep notch in this guy but it works "ok"... > > The thing is...I've never been able to find any paperwork on this guy. > > Anyway, pics can be seen: > http://www.ah6le.net/arcom/wacom.gif > http://www.ah6le.net/arcom/wacom2.gif > (the 2nd pic is pretty fuzzy but the label says it's a model WP-678, the > S/N and the factory tuned freqs) > > Ken 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/
