80 Meter Half Square

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My 80 meter bent half square was probably the best antenna I ever had. I had it broadside to Europe at my Hampton Va QTH, I had it broadside to the Pacific area for one contest at my New Kent location and then installed it again broadside to Europe. Very hard to work Europe off the ends so I took about 5 hours to rotate it. Only rotated it once!
It is important to note that a half square is not worth the trouble on 20 meters and above because a dipole at the same height as the top wire of the half square has more gain for DX. On 40 meters the top wire is about 35 or 40 feet and a 40 meter dipole at that height is about the same as the half square and a dipole is easier to put up.

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7 янв 2017

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Комментарии : 19

@pilkononna 11 месяцев назад

Great video about bent Half Square. Made these antennas couple of years ago both single element and 2-el versions on 80 cw. Great DX-antenna and it doesn't need radials or high tower's. Now playing with rectangle OBLong-loop's. It is nearly as good as HS in gain and can be installed easier than HS. 73 es DX de Jussi OH3RF

@dandypoint 11 месяцев назад

Thanks. What kind of rectangle OBLong loop are you talking about? Starting with a full wave quad loop you can go with wider or higher rectangles. For horizontal polarization height above the ground is the only factor for radiation angle, so for the lower bands vertical polarization is always better. Most loops can be thought of as some form of vertical array, as in a circular loop, “Flag” or “Pennant” rectangular receiving antenna for the low bands. The horizontal polarized loops are mostly thought of as stacked dipoles or stacked bent dipoles with their ends touching. Two stacked dipoles give good gain if separated enough, however as in a square Quad loop the dipoles are bent and the separation is very small, only 1/4 wavelength and gives minimal gain. Bruce arrays and the like while not loops can get pretty big for low bands. Check out this link to one of my blog posts: www.blogger.com/blog/post/edit/2551453391733787027/3009166728212827889

@pilkononna 11 месяцев назад

Hello OM. The OBLong rectangle is vertically fed from the other side vertical wire. It's a full lambda antenna about 85m 3.530MHz. Horizontal wires are 32m each and vertical wires are 10.5m each. Lower horizontal wire is about 1.5 - 3m above gnd. Fed directly 50 ohm coax and bandwidht about 80kHz SWR under 2. Very similar to HS, but can be built with lower trees or tower's. 160m version is about double the dimensions. GL with testing de Jussi OH3RF@@dandypoint

@russ_vee_jr4199 Год назад

Excellent info and very good presentation. Good Job Sir. I'm surprised you don't have more views, likes and comments. Did UToob place you in limbo? Anyway, I'm planning on both Half Square and Bob Tail Curtin antennas this Summer/Fall, but fed at a bottom end with a 56:1 transformer to get the EFHW multy-band function. My Take-Off will be off the Ends and not Broad-Side. I live in a corner apartment and my side door opens onto a very large field about 200' square. I can set the Half Square orientation to any compass direction but a Bob Tail will have limitations. Currently running a 40M EFHW Iverted ELL. I get into Europe with 5x5 to 5x8/5x9 with good audio reports. My EFHW will easily convert to and from a Half Square and with some work, also into a Bob Tail. My goal is to get into the Pacific with 100 Watts on phone. After 45+ years, I'm still working on copying CW, (Hi Hi) which will really help with DX. Thanks for your very good presentation but especially the info about bending the bottoms of the verticals...... 73 OM

@cmnall 5 лет назад

Great vid. Did you ever try the W3TB idea?

@dandypoint 5 лет назад

No, not yet.

@kevinmatthews2620 5 лет назад

how much of your half sqare is running parallel to the ground on each side,and high from the ground is it ??,bearing this in mind what is the total height of the half sqare ??

@dandypoint 5 лет назад

Measurements from my 80 meter half square as built: Top wire length (spacing) 135 feet Right side vertical 41ft 6 in Right side bend. 16 ft 7 in (bent in about 3 1/2 foot above the ground) CW ext 6 ft 11 in Left side vertical. 39 ft 6 in Left side bend 18 ft 7 in CW extension 7 ft 6 in Total right side SSB. 58 ft 1 in Total left side SSB. 58 ft 1 in Left side CW ext was 7 inches longer than right side. Antenna was within 2 feet of being perfectly symmetrical on CW. Feed was at top left corner. Note the two vertical segments were within 2 feet of being the same. This is good enough on 80 meters. Ideally you want the vertical height to be about 60 feet but by being only 45 feet and bending the ends in or out does not hurt hardly at all as the bent segments do not carry much current.

@K8URChannel 4 года назад

Very nice talk! de K8UR/4

@tiqueky 2 года назад

I tried to replicate Eznec files but I always got bad gain values, plot elevation as NVIS array. I don't understand where I'm wrong. Is it possible to have your eznec file ? Ed

@dandypoint 2 года назад

Yes. Just need your email address.

@melming8751 2 года назад

How are you feeding it at the top corner?

@dandypoint 2 года назад

Exactly like a dipole with 50 ohms coax. Feed is at either top corner. Essentially it is a full wave off center fed horizontal dipole, feed at a current maximum which is 1/4 wave from either end. Then the outer two 1/4 wave ends are bent down to be verticals (current will be in phase in the two verticals).

@wildbill1 3 года назад

Is this a mono band antenna?

@dandypoint 3 года назад

Yes. In fact, if cut for 3.8 MHz I add extensions to each side to switch to CW.

@surak1841 2 месяца назад

Foot, 20 foot not feet. not picking just correcting, great vid though.

@dandypoint 2 месяца назад

Thanks for the comment. Glad you liked the video but not sure where I used foot wrong. A tree is 20 feet high but I have a 20 foot ladder. I have a 20 foot long wire but the wire is 20 feet. I think 20 foot is an adjective and is singular but used as a noun it is 20 feet which is plural. For measurements we often use singular. I said 120 foot dipole. I said 60 feet high or at 60 feet. I guess I could have said 60 foot high or at 60 foot. As an adjective it follows the singular rule. Saying at 60 feet I am following the noun rule as it is the object of a preposition. English is complicated, so I may be wrong. Wish I had my old English books handy!