Good morning, what kinda dipole antenna you all using and how high is it ?
Right now, I'm running a end fed which is 50ft off the ground, does ok...
Right now, I'm running a end fed which is 50ft off the ground, does ok...
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Dipole antennas ?..
- Thread starter Oatmeal
- Start date
End fed is not a dipole.
Dipoles should be placed at least 1/2 wave over the ground.
Mike
Dipoles should be placed at least 1/2 wave over the ground.
Mike
Oatmeal: I am running a pair of "Phased" Doublets presently.
The Doublet is basically a Dipole variant, instead of fed with coax it is fed with 300/450/600 Ohm twin-lead. The antenna is about 45-50 ft at the Apex with the ends 25-35 feet above the ground. I have been using this variation for about 7 or 8 years now.
I have run a single Doublet antenna also. I have found them to be an effective All-Band antenna.
I have used them in length from 326 and 260 feet overall length for 160 thru 15 meters, and 124 feet for 80 thru 15 meters.
I have always used an outboard manual tuner to feed with.
I have had the best performance when tuned with a Double " L" (homebrew or presently PALSTAR BT1500A) or also the Link Coupled tuner (Johnson Matchbox). I also have used a DENTRON MT2000 or 3000 with a built-in 4:1 balun.
These all have worked well, it takes practice and a little experimenting with feedline length to get all bands on the tuners with the built-in baluns, however finding the "sweet spot" for all bands just take time and practice.
The Twinlead or Ladder line, whether 300/450 or 600 Ohm is brought Directly to the tuner. This eliminates the high loss from coax when being used at VSWR greater than 2.5:1 which can occur with any multi-band antenna fed with coax.
Many here on the forum have run a similar version, or presently running this type.
They are hard to beat!
http://ftp.unpad.ac.id/orari/librar...ant/docs/Introducing the All-Band Doublet.htm
http://ai4ji.com/Projects/antennas/doublet.htm
This my variant.
124 feet overall with 34 ft spacing. I love it! It's a killer!
I'll explain later if you are interested.
All the Best
Gary
The Doublet is basically a Dipole variant, instead of fed with coax it is fed with 300/450/600 Ohm twin-lead. The antenna is about 45-50 ft at the Apex with the ends 25-35 feet above the ground. I have been using this variation for about 7 or 8 years now.
I have run a single Doublet antenna also. I have found them to be an effective All-Band antenna.
I have used them in length from 326 and 260 feet overall length for 160 thru 15 meters, and 124 feet for 80 thru 15 meters.
I have always used an outboard manual tuner to feed with.
I have had the best performance when tuned with a Double " L" (homebrew or presently PALSTAR BT1500A) or also the Link Coupled tuner (Johnson Matchbox). I also have used a DENTRON MT2000 or 3000 with a built-in 4:1 balun.
These all have worked well, it takes practice and a little experimenting with feedline length to get all bands on the tuners with the built-in baluns, however finding the "sweet spot" for all bands just take time and practice.
The Twinlead or Ladder line, whether 300/450 or 600 Ohm is brought Directly to the tuner. This eliminates the high loss from coax when being used at VSWR greater than 2.5:1 which can occur with any multi-band antenna fed with coax.
Many here on the forum have run a similar version, or presently running this type.
They are hard to beat!
http://ftp.unpad.ac.id/orari/librar...ant/docs/Introducing the All-Band Doublet.htm
http://ai4ji.com/Projects/antennas/doublet.htm
This my variant.
124 feet overall with 34 ft spacing. I love it! It's a killer!
I'll explain later if you are interested.
All the Best
Gary
20 meter dipole. 14 guage wire with 1:1 balun. Inverted V. Highest point is 18'. Ends are at 6'.
SWR:
1.3 @ 14.150
1.1 @ 14.250
1.2 @ 14.350
Works great.
SWR:
1.3 @ 14.150
1.1 @ 14.250
1.2 @ 14.350
Works great.
I run an off fed center multiband dipole at about 65 ft high which I really like. No tuner needed for the ham bands:
https://palomar-engineers.com/tech-...-5KW-PEP-rated-FREE-shipping-in-USA-p74818225
You can make one of these for less money. Performance is very good. This is the one I use on my KiwiSDR and the occasional times I transmit.
- Rob
https://palomar-engineers.com/tech-...-5KW-PEP-rated-FREE-shipping-in-USA-p74818225
You can make one of these for less money. Performance is very good. This is the one I use on my KiwiSDR and the occasional times I transmit.
- Rob
I am running a fan dipole with wires for 17, 20 and 40, I load 15 on the 40 meter wire and use a tuner for everything else. I have it hanging in a V about 30 feet up.
I had a 15m dipole strung up in my Garage. I would open up the garage door and use it like that. I was surprised at how well it worked only 10' from the floor. I've since moved to an indoor-second-floor MLA .
I used inverted vee 20 and sometime a trapped 20/40 portable all the tme. Most often with 30(ish) watts. Constantly manage the minimum of 4 contacts each time out. Here is from Aug 2017 antenna setup and a map of contacts.The mast is a avi probe that is about 8'6" and with this time 10 watts.
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10, 15, 20 Fan dipole @ 30'
40/80 trapped at 30'
40/80 trapped at 30'
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The end fed antennas, seems to favor the direction the tail is in, I no at the old place we lived at it worked really well up there, since we moved, haven't had a lot of time to fool with it much.......but here have a lot of room for antennas...
Have a question for you guys....
How do you hang your G5RV/ZS6BKW dipole and support the center, I have tree's in the back yard, but there against the bottom of a mountain, and have a couple out front, and would like to string mine across the yard using a tree on each end of the property back/front, but problem doing this, there's no tree in the middle to support the center, how do you all hang one like this ?...
How do you hang your G5RV/ZS6BKW dipole and support the center, I have tree's in the back yard, but there against the bottom of a mountain, and have a couple out front, and would like to string mine across the yard using a tree on each end of the property back/front, but problem doing this, there's no tree in the middle to support the center, how do you all hang one like this ?...
Mine hangs from a tree but you could get this - http://www.mfjenterprises.com/Product.php?productid=MFJ-1908
Can you run some dacron rope from tree to tree and then hang the antenna from the rope? This method will also help you get the feed point high up in the clear.
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...runna pile-up on 6m SSB