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ready for a DXpedition to Jamaica and is not on email much. In fact, he may have already left and will be gone a couple of weeks. I've had 4 Force 12 antennas up for 4 years now and we get 120+ mph winds on the top of the ridge here during the Winter storms. Never had any problems with the antennas, let alone the rivets. But, I'm sure Tom or Nathan will comment when they get a chance. 73, Ed - W0YK -----Original Message----- From: owner-towertalk@contesting.com [mailto:owner-towertalk@contesting.com]On Behalf Of Roger Huntley Sent: Wednesday, February 28, 2001 7:24 PM To: Pete Smith Cc: Force12Talk@qth.com; Tower-Talk Reflector Subject: Re: [TowerTalk] Re: [Force 12 Talk] Rivets Pete, I just assembled a C31-XR and the element to boom connections consist of two rivets and two bolts at each connection. The C-3 that I am starting to assemble has three holes at each element connector with only two rivets. The center hole on the element flange is not drilled through the boom. I am thinking about drilling the boom at that location and inserting a bolt through similiar to what they did for the C31-XR. What does surprise me is that the factory has not felt it necessary to respond to all of the correspondence on this subject. Are they trying to hide something? I would hope that is not the case because I have been very impressed with the service and product until I started hearing about the possible rivet problem. 73, Roger Huntley, W7VV Pete Smith wrote: > At 08:34 PM 2/27/01 -0000, Tyler Stewart wrote: > >Force 12 has had their problems with their larger antenna designs... > > > >Seems like almost all of the problems I've heard have related to large > >element mountings to the boom. I think perhaps I'll add a bolt or two to > >the larger element brackets on mine before I put them up. (I'm putting up > >C49xr's and probably 340N's). > > > >It's also possible they've changed the mounting hardware/method on later > >production runs. > > > >Perhaps Natan or Tom will comment... > > I hope they will, but in the meantime ... > > I recall that this came up a couple of years ago, and it finally became > clear that the problem with the big boom rivets occurred with the beefed-up > models (H or D?), because the rivets that were used on a relatively few > antennas were too short and were not set properly when the booms (with > their additional layers of material) were assembled. I wish I could be a > bit more specific, but the Force12talk archive is temporarily down -- I can > see the messages indexed, but can't bring them up. > > I had a reflector come off my top C-3, but that was cockpit error on my > part -- I used big metal tapping screws to reattach the element bracket > after I had removed it during an abortive conversion to a C-4XL, and the > screws weren't quite big enough to hold well. When we reinstalled the > reflector (which landed in a treetop from 97 feet -- talk about luck!) we > used two plated Class 5 bolts through existing holes in the bracket, with > Nylock nuts, and I KNOW it's not coming off again. > > 73, Pete N4ZR > Contesting is! > > The World Contest Station Database > is waiting for your input at > http://www.qsl.net/n4zr > > -- > FAQ on WWW: http://www.contesting.com/FAQ/towertalk > Submissions: towertalk@contesting.com > Administrative requests: towertalk-REQUEST@contesting.com > Problems: owner-towertalk@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/towertalk Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |