Today, we operated a special events station from the Monaghan Antique Engine Show here in Ann Arbor. The organizer of the event is an ARROW member, and he has a van outfitted for communications that he drives out to the site. He has a push up mast on which he mounts a G5RV antenna that he operates in an inverted V fashion. He has an antenna tuner, which he uses to get on 75m, mostly.
Since we were going to begin operation around noon, I figured that we probably should get on 40m instead of 75m. We pulled out the antenna tuner, but I couldn’t seem to get the antenna to tune properly on 40m. The best SWR I could achieve was 3:1. This was odd, I thought, as I was able to achieve very low SWR readings on both 75m and 20m.