I am interested in the K8UR type array. The gain looks interesting but the f/b is poor. The ON4UN HB shows the upper and lower ends of the dipoles near the tower and at a 30 degree angle to the tower
Tom, I noticed one day that the base line on my SM220 CRT monitor was not straight but kind of wavey. I had an electric clock sitting on top of it. When I removed the clock, the base line was straigh
Hi Jim: Tnx for the note. I used a 20M5 for many years in Dallas. It was on a 85 ft self supporting tower. It had a low swr and good pattern across the band. Some people have had trouble with the ins
Mike, I and many others use this type of array on the low bands, 80m in my case. The important features are: 1. The feed lines to each vertical are an odd multiple of 1/4 wavelength electrical( usual
Hi Ron: I am facing a similar problem here with an Orion rotator on a 131 ft crankup tower 250 ft from the shack. The instructions with the Orion say use Nr 18 up to 125 ft, nr. 16 for 125-200 ft, nr
Sounds like you may have BC station pickup on the tower. Try your exciter on low power and I bet it works OK;. 73, Dan, N5AR List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems, Try
You bet it is. My friend K5AQ in Texas has used a crankup tower with separate gamma matches for each band tuned with vac variables. He is a serious competetor on 160 with around 200c. 73, Dan, N5AR T
N6BT, of F12, talks about this on p30 of his book "Array of Light". He says that boom length is the primary item in determining forward gain if it is "fully populated" with elements. Adding additiona
The article which I sent to Kevin and he posted on the Ft. Wayne page is the one from HR, not QST. Don't know anything about any in QST, May, 1975. 73, Dan, N5AR List Sponsored by AN Wireless: AN Wir
I suggest that we all give Frank a round of applause for his excellent posting. 1. He made an effort to solve his problem by consulting the antenna book and by making measurements before posting. 2.
I am planning to bury plastic conduit to carry hardline and control cabling. I have looked at the corrugated black stuff as used for drains. Has anyone had experience with this stuff versus the regul
I bought a set at K Mart around Christmas time for $150. It included a small 5 in. black nd white tv with wall p.s.(also operable on internal D cells. The camera had a ring of IR diodes around the le
I have been buying black Ty Wraps at my local NAPA store. They have a good variety. I don't know if these are better or worse than other black ones but mine have been up 3 years in eastern Washington
Mike: I just ordered and received a 100 ft replacement lift cable for my TX472 from US Tower. It has the required loop and Nicopress on one end. It was deliverd along with my new 131 ft crankup from
Mike, WA5VGI just lost his LM470 tower because one of the pulleys wore so much that the cable came off the side of the pulley, wedged and broke. It came down with a crash. You might want to check tha
Hi Jack: Yes they do. They have built at least 3, N6BU, K7ZV, and I have just received ours. They are rated at 30sf in an 80 mph wind, have 3, not 1 lift cables between sections, and have an integral
The base is 4x4x11 1/2 and 16 yds concrete. The design is ingenious. The sides of the base section are 37 1/8 inches. They have basically used the 689 tower shape, increased the wall of the corner tu
Is it customary to use a torch to heat rebar when bending it? 73, Dan, N5AR List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems, Trylon Titan towers, coax, hardline and more. Also c
There are quite a few Bird line sections in the ham flea markets. Some of them do not have the connector which brings out the leads to the meter. I have found that a PL259 can be modified to do the j
After reading the comment by my old friend W5AH, I pulled my May 1975 Ham Radio to read the article. It is very complete, 6 pages with 4 sets of curves. If someone will post it on their web page, I w