Geoff- Thanks very much for all the great info on your improvements and additions to your G5RV. I do not think I would have enough space to do what you have done. However, time will tell.
BTW- I fully agree with K4KYV's statement about the necessity of using a scope to monitor your AM signals. That's something else I will have to work on. When I get to that point I sure do have a great group of AMer's to guide me! Talk to you later. Bob K5SEP --- ARS W5OMR <[EMAIL PROTECTED]> wrote: > On 12/25/06, Bob Scupp <[EMAIL PROTECTED]> wrote: > > > Thank you for the warm welcome and information on > AM > > activity. > > > Everyone with comments is always welcomed. > > Good to see you again, Bob. Been a while. > > > Actually I have a G5RV antenna. I seem to remember > it > > is for 10-80 meters. I was originally thinking of > > using the tower I mentioned to hold the center > feed of > > an inverted V, with the broadsides facing > > East-West(?). The ends would maybe about 15-20 > feet > > above ground. However, being out here in the > country > > with no strict municipal or other restrictions, I > can > > also experiment with other antennas. > > > I have never been on 160 meters. Sounds like > another > > band on AM to experiment with. > > I ran, for the longest time, an inverted Vee on 75m, > because of my > 'restricted' space. Until a year ago (or more, now) > when I used > another lenght of wire, attached one end to the > existing 75m Inv Vee, > and then closed in the bottom of the antenna . That > made it a loop, > with another ~120' of wire, in addition to the 120' > of wire that was > up there. > > What I wound up with was a full-wave Delta Loop > installed in a > Vertical Plane, and it works great. I am constantly > amazed by the > signal reports I get from that antenna. > I think the biggest gain I got, was when I switched > from coax to > ladder-line for feed-line to the antenna. It just > got that much > better, when I closed in the loop. > > The actual formula for the loop length is 1005 / > f(MHz) but when you > feed it with 50' of 450 ohm ladder line, a lot of > sins are forgiven. > ;-) > > Although I don't think it's high enough, 60' is a > good enough start > for a center-support for the 450 ohm ladder-line and > loop feed point. > (not to mention, it's better than nothing ;->) > > 1005 / 1.9 = 529' of wire. Typically, that would > work out to around > 176' per leg. So, you can't make it a perfect > triangle. So what? > Stretch it out as far as you can, and feed it at the > top of the > antenna. The antenna would work on 160m, it'd be 2 > wavelengths on 75, > and would exhibit even more gain on the higher > bands. As long as you > have a good wire-tuner from the rig to the > feed-line, you'll be great. > > > I agree with you in that the early predictions for > > Cycle 24 looks like it is going to be a whooper! > > Scientists are predicting a peak around 2010-2011 > of > > 160 for a sunspot peak. I guess my timing is about > > right on. > > For the higher bands. Nothing more for the lower > bands, but more noise ;) > > > Again Jim thanks for the advice. > > Jim's a good source, Bob. > > > -- > Operating your AM rig without a scope > is like driving our car at night without > headlights.(~K4KYV) > > 73 = Best Regards > -Geoff/W5OMR- > Merry Christmas! > ______________________________________________________________ > AMRadio mailing list > List Home: > http://mailman.qth.net/mailman/listinfo/amradio > Partner Website: http://www.amfone.net > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > ____________________________________________________________________________________ Need a quick answer? Get one in minutes from people who know. Ask your question on www.Answers.yahoo.com ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
