Wednesday, December 28, 2011
By the fall of 1996, I was in the market for an antenna that could reasonably support several bands, including the WARC bands. The R7000 seemed like a pretty nice solution -- seven bands with an option to add 80m as well. I bought one in November of 1996.
To mount it, I joined a 10 foot piece of 1 1/2 inch rigid EMT to a 12 inch steel pipe nipple and planted it 3 feet in the ground using two sacks of concrete. The pipe union was buried in the concrete. The resulting vertical pipe was about 1.9 inches in diameter -- almost large enough to fit the mounting U-bolts -- and nearly 8 feet tall.
While not as optimal as the specified 2 inch mast, this support worked very well for 15 years. I only stopped using the R7000 a couple of years ago when the coax to it was cut when the cable company re-buried the cable. (That one was cut by septic tank workers repairing the system)
The R7000 was not a great performer, in my opinion. I first called it the R7000 attenuator. I later discovered that it was designed to work at a height of 18 feet, not the 8 feet I had installed it. After a few years, I got the idea to add some radials at the base of the mast. Seven 20-foot radials made the antenna appear to work a lot more reasonably.
Since I wasn't using it at the old QTH, the R7000 seemed like the perfect antenna to move to the Micro-Shack. It required only one support, covered seven bands, and with a few radials seemed to work OK. A mediocre antenna seemed better than none at all.