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 <n7rt@cox.net> 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:topband-bounces@contesting.com] On Behalf Of Lee
> STRAHAN
> Sent: Friday, August 26, 2016 3:58 PM
> To: Gary@ka1j.com; topband@contesting.com
> 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
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