> I began to wonder if not just a 53 ft vertical with
> auto-tuner at the base might be just as effective?
The issue would be matching on 30 meters since that is relatively
close to 1/2 wave there and lobe structure above 30 meters.
> And finally, if the HyTower is better, any thoughts on adding similar
> decoupling stubs to a 53 ft aluminum telescopic mast?
Now you're talking about something similar to the "Hy-Tower Jr."
http://www.hy-gain.com/Product.php?productid=AV-18HTJR
although it's only about 40' tall.
For simplicity, I would consider 55 feet but sturdy enough to handle
a 10 or 12 foot "spreader" (or two) capable of supporting parallel
wire verticals for some of the other bands. Whether one makes them
non resonant (e.g. 22' and 44') and allow the tuner to handle things
or makes them resonant (e.g. 33, 21, 16, 11), install traps in some
of them or builds stub tuned verticals from "window line" are all
trade-offs for the designer.
73,
... Joe, W4TV
On 9/4/2013 1:16 PM, Henry Pollock - K4TMC wrote:
I know from a recent thread, that the old Hygain HyTower (AV-18HT) has a
fond following. There were even a few notes about home-brewing something
similar. Considering the cost of a new AV-18HT ($1000.00), or a good used
one ($500.00), I began to wonder if not just a 53 ft vertical with
auto-tuner at the base might be just as effective?
And, for this discussion, lets not worry about powers above 200 watts.
And finally, if the HyTower is better, any thoughts on adding similar
decoupling stubs to a 53 ft aluminum telescopic mast?
73,
Henry - K4TMC
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