I have a Hi-Z 4-8 PRO. It is a real horse on vertically polarized signals. To supplement this I also have a Waller Flag on a 40 ft boom at 95 feet turned by a TIC ring rotor. It is a super hoss on horizontally polarized signals. This fall I plan to use them with diversity receive.
73, John, W4NU Sent from my iPhone > On Aug 26, 2016, at 4:30 PM, Hardy Landskov <[email protected]> wrote: > > Hi Lee, Gary, et al > In my opinion trying to roll your own as far as the electronics goes is "a > dollar chasing a dime" mentality. I have a Hi-Z 8 Circle and is clearly the > best 160 rx antenna I have ever used. When you use this antenna for the > first time you will never think about your VISA card HIHI. > I want to thank Lee for all you help in constructing, trouble shooting, etc. > My elements are about 21 feet and I use the new amp if that is what it's > called with the enclosures I got from Mouser. > 73 Hardy N7RT/4 > > -----Original Message----- > From: Topband [mailto:[email protected]] On Behalf Of Lee > STRAHAN > Sent: Friday, August 26, 2016 3:58 PM > To: [email protected]; [email protected] > Subject: Topband: active antenna height > > Hello Gary and all, The answer to your question depends on how quiet your > location is. If you have an extremely quiet location I would go with another > section of tubing for 23 feet overall with the Hi-Z. If your location is > pretty normal for noise then 18 feet or so will be fine with the Hi-Z > array. There are times here in the early morning when the band noise drops > below my array noise for a short period of time and I have been using 20 > foot elements. > Another point to consider is 3/4 inch fiberglass rod is easy to get and > has proven strong enough for element insulators. Adding a few feet of 3/4 > tubing to each element would make your insulators much easier to construct > and increase array gain. You can always add more length later as you see the > need. > Four inches of overlap has seemed to work well. > Lee K7TJR > > >> I've decided to make the plunge and buy one of the 8 element active >> arrays > for 160M-40M. Looking at the price for the antenna kit, it's just too much > considering the cost of the electronics, so I need to roll my own. > > I was thinking of getting the Telescoping Aluminum Tubing that comes in 6' > lengths from Texas Towers; .375", 5" & 6.25". If I slide each inside 6", > that'll come to a 17' tall element. Is that sufficient height? Would adding > another 2-3 feet make any difference with these kind of active antennas? > > 73, > > Gary > KA1J > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
