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this issue about taping the feeder wires next to each other for the best 15M SWR. I'm sure future manuals will reflect this. Force 12 is not hiding anything., and Natan has been very helpful. I don't blame them at all for the picture in the manual showing the wires farther apart because in my installation, the spacing of the wires didn't make much difference at all! I ended up with them close together, maybe 3-5 mm apart, but I tested at spacings up to an inch or more without much difference at all (still good). The only things my simple brain can think of at the moment are differences in element lengths and feedlines. I think it's also possible to over-tighten the u-bolts and short the elements. Otherwise I don't undertand why some have had this "15M problem" and others (I would guess most) have not. I have no connection with F12 - just a VERY satisfied customer who assembled the antenna per manual and it works like they say (great) with flat SWR <1.2:1 on 15M. Hope you that are having troubles get them easily resolved so that you can join those of us very happy with the antenna! HI 73 --------------------------------- WA9ALS - John jfleming@shelbynet.net http://www.qsl.net/wa9als --------------------------------- ----- Original Message ----- From: J T Gwin <jtgwin@home.com> To: N2TK <n2tk@earthlink.net>; 'Chris Swallow' <swallow@btconnect.com>; 'Force12Talk' <Force12Talk@qth.com> Sent: Thursday, June 08, 2000 7:33 AM Subject: Re: [Force 12 Talk] C31 15M feed. > My C31XR defied all attempts to get it to resonate on 15m (single feedline), > until I taped the two feeder wires together. Directly together. SWR > dropped > like the proverbial rock. Performance on all three bands is great, but I > was > (and remain) greatly disappointed that Force, with full knowledge of the > problem, > failed to even put an insert in the instruction manual regarding this issue. > > ni4m > > ----- Original Message ----- > From: "N2TK" <n2tk@earthlink.net> > To: "'Chris Swallow'" <swallow@btconnect.com>; "'Force12Talk'" > <Force12Talk@qth.com> > Sent: Thursday, June 08, 2000 6:32 AM > Subject: RE: [Force 12 Talk] C31 15M feed. > > > > K3OO is using a single feedline. He had to remove 3" from each side of the > > 15m driven element to get it to resonate in the middle of the band. We > could > > not get the resonance in the middle of the band no matter what we did with > > the wires. > > > > I am ordering a C31XR today. Will be curious if the dimensions have > changed > > on the C31 or if I will have to do the same as K3OO. Has anyone else had > > this problem ? If so, how did you fix it? If not were you able to get the > > resonance in the middle of the band by taping the wires close together? > > Tnx > > Tony > > > > -----Original Message----- > > From: Chris Swallow [mailto:swallow@btconnect.com] > > Sent: Wednesday, June 07, 2000 6:34 PM > > To: Force12Talk > > Subject: [Force 12 Talk] C31 15M feed. > > > > I am using the C31 with separate feeds for each band. It has been on and > of > > the tower a few times. I have great difficulty getting the match > consistanly > > correct. Each time I put it back on the tower the hairpin and element > length > > have to get adjusted all over again. It also does not have sufficient > > bandwidth to cover SSB and CW without the Alpha crying enuf!. > > > > Anyone else out there who has got this sorted. I would be interested in > the > > driven element they ended up with and the hairpin details. > > > > > > Cheers > > > > Chris G3VHB > > > > > > > > -------------------------------------------- > > 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 force12@qth.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 force12@qth.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 force12@qth.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 force12@qth.com |
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