The CBRT/TWRC Convention
July 28 & 29, 2017

Aurora setup

Help with installing an Antenna, or just choosing the right antenna to go with your radio, or your mobile.

Moderator: JR Moderator

User avatar
Mtn Lynx
Donor
Donor
Posts: 251
Joined: Sunday, 11 September 2016, 1:00 AM
Radio: Galaxy 2517/959
Antenna: A99/Wire dipole
Name: Cletus
Location: Western AK

Aurora setup

Post by Mtn Lynx » Sunday, 01 January 2017, 17:02 PM

I have been interested in aurora skip. But have not yet heard it. I have a Solarcon a99 and have made some skip contacts with my setup. Last week aurora was very visible from here but I still did not hear anything. I am thinking it may be my antenna. My question is, if I were to get a dipole antenna and set it up toward the north where I have seen aurora if that may help. Maybe an inverted V with the ends of the dipole northeast and northwest? Any recommendations would be greatly appreciated. Don't want to invest in a expensive directional antenna just yet.
\m/ >.< \m/
Galaxy DX 959
Galaxy DX 2517
Cobra 148 GTL
1/2 wave Dipole
Solarcon A99
WAK 223




User avatar
Bluerunner
Donor
Donor
Posts: 184
Joined: Friday, 05 July 2013, 18:39 PM
Radio: Cobra 142
Antenna: Starduster
Name: Mike
Location: SE Louisiana, North of New Orleans

Re: Aurora setup

Post by Bluerunner » Sunday, 01 January 2017, 20:48 PM

A horizontal dipole transmits & receives from the broadside. Very little signal is received or transmitted off the ends. So with a horizontal dipole you lose signal strength off the ends which can reduce interfering signals from those directions improving the reception from the broadsides. An inverted V is usually easier to erect but may lose some of the directivity typical of the horizontal one.

Skip is fun but can confound your expectations as it will scatter and flip polarizations as it bounces around in different layers in the atmosphere.

Wire dipoles are cheap and fun to experiment with and often yield surprising results.

User avatar
56jmk71
4 PILL USER
4 PILL USER
Posts: 38
Joined: Friday, 25 March 2016, 9:29 AM
Radio: President Grant 2
Antenna: 1/2 Wave GP, dipoles
Name: Juha
Location: Northern Finland

Re: Aurora setup

Post by 56jmk71 » Monday, 02 January 2017, 4:38 AM

All depends about elevation angle.
Is the aurora high in the sky or low in the northern horizon?

Horizontal half wave dipole strung half wave lenght high should be worth of trying.
Perhaps lower if you want to aim hihger, higher if you wat to aim to the horizon.

My dipole type antenna 10m high is usually useless in aurora, it shoots too low I think.

Usually on aurora I can hear stations 100-500km from me.

Is there ssb stations inside that radius fron you?


-- Monday, 02 January 2017, 15:18 PM --

I have to add:

I think there is nothing wrong with your antenna.

It may happen that there is aurora visible but no propagation(or no stations audible).

Most of the stations have just one antenna and use their antenna on aurora also.
The most popular antennas here are 5/8 and 1/2 wave GP antennas.

As a cheap and easy to make antenna the 1/2 wave wire dipole is absolutely worth of trying.

(edited by MDY, removed multi-repeated posts)

User avatar
MDYoungblood
Moderator
Moderator
Posts: 6623
Joined: Saturday, 12 June 2010, 19:05 PM
Radio: Uniden Washington
Antenna: Avanti Sigma II
Name: Greg
Location: Baltimore, MD

Re: Aurora setup

Post by MDYoungblood » Saturday, 07 January 2017, 13:47 PM

A dipole will work but you will have to "trail and error" the distance off the ground, the idea would be to get the signal to shoot upwards than it would out to the horizon. I would start at 8ft off the ground using mother earth as a reflector. Check out NVIS antennas.

3's

Greg
ImageImageImage

"321, the Middle of Maryland"

23 AM "WORLD Image WIDE" 38 LSB

Strong Supporter of America's Original Homeland Security Act
The Second Amendment

Base
Uniden Washington
Mobile
Texas Ranger TR-696FD1C
Handheld
Maxon HCB-40WX
Antennas
Avanti Sigma II
Homemade Full Wave Loop
Homemade 1/2 wave Dipole
Hustler 102" SS Whip and Hustler Ball Mount

Official Moderator - CBRT Complaint Department



User avatar
Mtn Lynx
Donor
Donor
Posts: 251
Joined: Sunday, 11 September 2016, 1:00 AM
Radio: Galaxy 2517/959
Antenna: A99/Wire dipole
Name: Cletus
Location: Western AK

Re: Aurora setup

Post by Mtn Lynx » Saturday, 07 January 2017, 21:00 PM

I had plans to take my wire dipole and set it up with some roofing sheet metal behind it and aim it toward the north where I have seen the aurora. Sounds loony but it might work. Maybe some gutter sheet metal might work. I have some extra gutter material.
\m/ >.< \m/
Galaxy DX 959
Galaxy DX 2517
Cobra 148 GTL
1/2 wave Dipole
Solarcon A99
WAK 223




User avatar
231
Site Admin
Site Admin
Posts: 7205
Joined: Friday, 13 January 2006, 15:19 PM
Radio: Uniden/Icom/Cobra
Location: Trudging the Pacific NW Trail
Referrals: 1

Re: Aurora setup

Post by 231 » Sunday, 08 January 2017, 10:45 AM

Mtn Lynx wrote:I have been interested in aurora skip. But have not yet heard it. I have a Solarcon a99 and have made some skip contacts with my setup. Last week aurora was very visible from here but I still did not hear anything. I am thinking it may be my antenna. My question is, if I were to get a dipole antenna and set it up toward the north where I have seen aurora if that may help. Maybe an inverted V with the ends of the dipole northeast and northwest? Any recommendations would be greatly appreciated. Don't want to invest in a expensive directional antenna just yet.
Propagation is predictable but certainly not it's polarity. Nothing wrong with setting up a horizontal dipole...but I'd get it as high as you can. A simple flat top broadside where you want to go should suffice I'd think. You might even consider making yourself a Moxon beam which really works great & inexpensive.

Experimentation is fun...but not sure how your metal roof will work with it? My guess is you'll need to get the dipole quite a bit higher than the roof, and may actually negatively affect it's performance. I'd keep a "Plan B" in place for relocating it too...just in case. Might work great though.

Let us know how it goes.

231

User avatar
Mtn Lynx
Donor
Donor
Posts: 251
Joined: Sunday, 11 September 2016, 1:00 AM
Radio: Galaxy 2517/959
Antenna: A99/Wire dipole
Name: Cletus
Location: Western AK

Re: Aurora setup

Post by Mtn Lynx » Sunday, 08 January 2017, 19:32 PM

Saw some aurora last nite for a bit. Heard a little noise on 39 LSB it didn't last long enough for me to really make it out. Had not set up my dipole yet. Will update when it's done.

-- Tuesday, 10 January 2017, 18:28 PM --

Set up my horizontal wire dipole today. just gotta wait...." :pale:

-- Thursday, 12 January 2017, 22:52 PM --

I got the schematics for HomerBB style Moxon beam, waiting on supplies to start my build.
\m/ >.< \m/
Galaxy DX 959
Galaxy DX 2517
Cobra 148 GTL
1/2 wave Dipole
Solarcon A99
WAK 223



User avatar
56jmk71
4 PILL USER
4 PILL USER
Posts: 38
Joined: Friday, 25 March 2016, 9:29 AM
Radio: President Grant 2
Antenna: 1/2 Wave GP, dipoles
Name: Juha
Location: Northern Finland

Re: Aurora setup

Post by 56jmk71 » Monday, 20 March 2017, 4:03 AM

Hello Mtn Lynx!

Have you got any contacts with your dipole?

When you expect aurora contacts, perhaps you should check USB also.
It's used in Europe more often than LSB.

Not any kind of skip here in Finland on 11m band for a long time.

User avatar
Mtn Lynx
Donor
Donor
Posts: 251
Joined: Sunday, 11 September 2016, 1:00 AM
Radio: Galaxy 2517/959
Antenna: A99/Wire dipole
Name: Cletus
Location: Western AK

Re: Aurora setup

Post by Mtn Lynx » Monday, 20 March 2017, 10:10 AM

Had 1 aurora experience last month. Did not contact him tho. I think it was someone from japan. I could not understand him.
\m/ >.< \m/
Galaxy DX 959
Galaxy DX 2517
Cobra 148 GTL
1/2 wave Dipole
Solarcon A99
WAK 223



User avatar
56jmk71
4 PILL USER
4 PILL USER
Posts: 38
Joined: Friday, 25 March 2016, 9:29 AM
Radio: President Grant 2
Antenna: 1/2 Wave GP, dipoles
Name: Juha
Location: Northern Finland

Re: Aurora setup

Post by 56jmk71 » Tuesday, 21 March 2017, 1:42 AM

OK, even you hear starge language, you can try to break in.

Anyway, transmissions on aurora propagation can be very difficult to read even between the stations speaking the same language.

I haven't dare to try contact via aurora in any other language but Finnish.

User avatar
56jmk71
4 PILL USER
4 PILL USER
Posts: 38
Joined: Friday, 25 March 2016, 9:29 AM
Radio: President Grant 2
Antenna: 1/2 Wave GP, dipoles
Name: Juha
Location: Northern Finland

Re: Aurora setup

Post by 56jmk71 » Tuesday, 21 March 2017, 1:47 AM

Not completely true, I tried to call on 39LSB if somebody in the Alaska answers...
But I'm not sure at all If I could really communicate in English in that difficult conditions.

User avatar
443 Arizona
Wordwide & Qualified
Wordwide & Qualified
Posts: 569
Joined: Thursday, 29 April 2010, 13:22 PM
Radio: madison on 5/8 wave
Location: phoenix, arizona

Re: Aurora setup

Post by 443 Arizona » Wednesday, 22 March 2017, 10:03 AM

excellent replies so far.
here is another easy build,,, you might consider a full wavelength wire dipole, or longer, use insulators and go 3 wavelengths.
[building yourself a running skipline , the gain on receive might get you in the game :cyclopsani: ]
when this is set up in such a way as you could change the direction by just running out in the yard and move a wire from post to post.
you may even discover that (posibly using) a ladder feedline, you may pick up signals.
anything becomes an antenna when you consider that charged particles are just lookin for direction. :albino:
i want to ask,and maybe i should explain my question after,
do you notice a difference in propagation between day and night in the winter as well as difference in day/night in the summer?
because i am assuming there is a big difference , as for here in Arizona, there is a small difference.
and are you in a "mineralized" area? lot of iron ,haha GOLD? you could experiment with finding a spot with good node characteristics.
just carry a horizontal halfwave dipole around and you will see what i mean.
you could get wacky and sit on top of a mountain with a portable unit and longwire and,,,whalaaaa, :chef: speak to martians. :alien:


Post Reply Previous topicNext topic

Who is online

Users browsing this forum: No registered users and 4 guests