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could mount the Sigma antennas horizontally for NVIS, and at less than a full wavelength high for the band you will be using it on. You might consider using the Sigma 40XK instead of the Sigma 5 - especially if you are going to set up on one band for hours at a time. I have a 40XK and a Sigma 5 GT. I haven't tried it on 80M, but it is possible to make a set of coils for 80M. Depending on what tuner you use it might work OK on 80M for local stuff. I have used the 40XK all winter with the coils set to 30M and used a tuner for 40 and 30M, and was able to work over 100 countries on each band. I use the Sigma 5 Gt for 40 - 10. So I can vouch for their DX-ability, and that the 40XK still works great on 40M even with 30M coils and a tuner . . . . Rich KY6R ----- Original Message ----- From: "Ed Thierbach" <ethierba@umich.edu> To: <Force12Talk@qth.com> Sent: Thursday, June 26, 2003 11:29 Subject: [Force 12 Talk] Loading Sigma-5 on 40/80m > Hi, everyone - > > My apologies if this is a "newbie-ish" sort of question, but I want to > be sure before I do something stupid. If I attempt to load my Sigma-5 > on 40 or 80 meters with a wide-range antenna tuner, is there a risk of > damaging the antenna somehow? I'll only be using 100W max, so I don't > expect to melt the aluminum :-), but I want to be sure I"m not going to > damage something on the PCB. > > I do realize that "inefficient" is an understatement in this scenario, > but I want to run some experiments to see if I can radiate enough > signal to reach the local section emergency nets on 40 and 80. I can > and will put up a real 40/80 dipole eventually, but it would be nice to > know if I can just tote my S-5 to a field site and get 40 and/or 80 as > well as 10-20. > > Thanks and 73, > -Ed- > > Ed Thierbach, AB8OJ > edt@acm.org > > > > -------------------------------------------- > Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. > Force12 Web Site: http://www.force12inc.com > > To Submit Message to the List: Force12Talk@qth.com > To unsubscribe and view the Message Archive: see http://qth.com/force12/list > For problems with the list: contact n4zr@qth.com > > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |
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