Hi, Warren - Sorry to jump in on a two-way chat. I hope you will excuse my anxiousness in doing so. I am curious about the use of the delta loopMessage 1 of 3 , May 8, 2012View SourceHi, Warren -Sorry to jump in on a two-way chat. I hope you will excuse my anxiousness in doing so.I am curious about the use of the delta loop on two bands. Can you tell me if you are using an 80 meter delta loop on 40 meters, as well as on 80 meters, or is it the other way around. I'm trying to get something up in my small lot that will get my signal across the Pacific.Do you think the delta loop would be better (for DX) than a tpo-loaded vertical? I can only go about 44 feet in height with either antenna.Thanks, Warren. Have a good day.73,Jim, K8OZ
--- On Tue, 5/8/12, Warren McRobie <w.d.mcrobie@...> wrote:
From: Warren McRobie <w.d.mcrobie@...>
Subject: Re: [loopantennas] 80 meter delta loop a big success on hillside!
Date: Tuesday, May 8, 2012, 11:30 PM
Ron the delta loop is a good antenna. I am often invited to a club where they have a 80 m delta loop permanently set up - it is magic. At home I only have space for a 40 delta loop it is really good - or was till 40 got crowded out with plasma tvs and other crud producers. The beauty of feeding a delta loop with a balun instead of a matching line of coax is that it loads up perfectly on 80 and 40 or 40 and 20 depending on which band it is cut for. Cut for is a relative term when it come to delta loops they are so broad, they really only have to be in the ballpark. I only use 100 watts and am constantly met with disbelief that I am only running 100 watts, most thinking I must be running linear. The scheme of one tower and four loops sounds really good - the one thing with the delta loop is that it is not rotatable ;(. I spoke to a ham in Russia that had a bi directionally switchable pair of delta loops. He seemed to have a good front to back ratio from where I was listening ;)
I really don't know what I want on the home front yet. A totally vertical Delta or square loop which both would fit, or something with a slope? I just put up an 80 meter delta loop in the mountains a bit of way out of town. The wire height from the ground was awful, about 2 feet high on average, but the slope of the loop left the apex about 30 feet or a little more above the base line of the loop. I had the loop pointing approx sth east. I could receive as high in the east as Nova Scotia and as far south as Florida's southern end. I made contact with the Collins user group on 40 meters and was able to talk with both their east coast and west coast moderators with a signal strength of about 5-9 to 5-10 either way. I had reception up into British Columbia and south into some Spanish speaking countries. The southern states also were an easy contact. The only stations I could hear others talking with that I couldn't even hear were those directly north of my position here in Truth or Consequences New Mexico. Colorado, Idaho, and a few others in that direction. I really am favoring the delta loop in a sloped configuration as I could buy one tower and have four loops facing all directions and just switch out the unused loops as needed. I'm going to the same hillside next week to try a square 80 with the same slope. I'll report back on that one for all.... 73's Ron KF5PTJ (New Ham) PS- I hate my call sign, just applied for a vanity... I'll let you all in on the new one if I get it..
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