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> > > > "Guy Olinger, K2AV" wrote: > > > > > > Don't bother to measure anything with the antenna horizontal at 6 feet. > > > You will get weird readings. About the only thing you can check reliably > > > there is whether your coax is really hooked to the driven element, or if > > > your balun is open-circuited. > > > > > > For an antenna that small, some have suspended it from a tree, or rope > > > between trees, pointing up, with the reflector closest to ground to > > > check out SWR before putting it up. But don't lay the reflector on the > > > ground. Get it up six plus feet. > > > > > > Then check it out UNDER POWER using a regular swr bridge. (A huge amount > > > of stuff in Tower Talk archives about the little analyzers being > > > bothered by either BC interference or odd coupling to the coax shield.) > > > > > > If you mount a beam directly over a house on a tripod, you may get some > > > odd readings you didn't get when you had the beam hung up for checking. > > > The house has a lot of wire which may couple depending on how far above > > > the roof it is, and move the SWR around. > > > > > > But remember: SWR does NOT equal performance. SWR does NOT equal > > > pattern. If it's a little off on swr on your tripod, but the pattern is > > > good, either ignore it if your transmitter loads it, or use a tuner. If > > > SWR is WAY off, you have a problem > > > > > > Good Luck! > > > > > > - - . . . . . . - - . . . . - - . . - . . > > > > > > 73, Guy > > > k2av@contesting.com > > > Apex, NC, USA > > > > > > ----- Original Message ----- > > > From: Roger Doran <doran@bigfoot.com> > > > To: <force12talk@qth.com> > > > Sent: Sunday, May 21, 2000 7:21 AM > > > Subject: [Force 12 Talk] C3SS Questions This was the original message: > > > > Hi all; > > > > I have a new C3SS - built, but still mounted only 5' off the ground for > > > > easy adjustment and settings. Do any of you have any hints or tips > > > > before I raise it to the roof for mounting on a tripod (no easy task)? > > > > I think it's great - was well marked, is well made - has some confusing > > > > directions about the loading and some more on which tips you can change > > > > the spacing on for VSWR though I have no idea of how one would do this > > > > once it is mounted, nor how effective - read "accurate," it would be at > > > > 6' off the ground. TIA for any suggestions. > > ****** I totally understand that VSWR measurements cannot be made in this position and Guy's suggestions can be followed without problems. > > Other concerns were that I found one element drilled incorrectly- The B > > side was fine, but the A side the tip didn't match and the length was > > off. This was element 2- the 15 meter reflector- the "A" tip was 1/2 and > > inch off and so was the .500" inch section and as I said the "B" side > > was fine. > > Also the studs on the "A" side of Element 1 are rotated 10 to 15 degrees > > counter-clockwise and the same thing on Element 6, but on the "B" side. > > Other than that, all was fine - am going to call and see if Tech can > > supply any info about the studs and element 2's problem. ******* Here, I understand Chuck Lewis's comments about the measurements. The elements measure -Exactly as specified! Hooray and congrats to Force 12! Really neat. *******MY MAIN CONCERN is here: Just found that if I set the feedpoints on Elements 1 and 6 at 45 degrees as mentioned on page 11-item 7b, and shown on the Feedpoint Detail page; that the loading wires then also shift to 45 degrees off horizontal- is that right? I thought the loading devices should be horizontal. Again, thanks for the quick response. Oh yes- the studs that are Slightly off horizontal have the markings lined up such as >< on the fiberglass. *************** > > > > Roger Doran, W1MZA, On > > > > The RockBound Coast of Maine > > > > So Much To Learn........ So Little Time........ > > > > -- > > > > > > > > > > > > -------------------------------------------- > > > > 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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