|
|
11-18-2017, 07:37 AM
|
#1
|
Fr Jeff
1989 29' Excella
Saginaw
, Michigan
Join Date: Nov 2009
Posts: 210
|
Amateur Radio in Airstream
Wanting to set up HF ham station in my AS. Looking for antenna options and pros and cons of each. Not sure where to ask in these forums.
__________________
Fr. Jeff
2016 F150 Ecoboost
1989 Excella 29
|
|
|
11-18-2017, 07:46 AM
|
#2
|
Rivet Master
2020 28' Flying Cloud
2017 23' Flying Cloud
Hiawassee
, Georgia
Join Date: May 2017
Posts: 1,398
|
Are you looking for something to attach to the AS or string up at a campsite? There’s a lot of material out there on antenna options for small/restricted spaces. For HF if you have a good antenna tuner there’s a lot you can do in a campsite that would work fairly well.
|
|
|
11-18-2017, 08:25 AM
|
#3
|
Fr Jeff
1989 29' Excella
Saginaw
, Michigan
Join Date: Nov 2009
Posts: 210
|
Amateur Radio in Airstream
I prefer not to mount on AS. But, many rv parks do not seem to have lots of room for long wire antennas. Also, some have rules in that regard. I have an MFJ949E that I am not using in my QTH, so was thinking of using it in the AS. But, may get an auto tuner like the LDG I hav at the home shack.
__________________
Fr. Jeff
2016 F150 Ecoboost
1989 Excella 29
|
|
|
11-18-2017, 09:32 AM
|
#4
|
Rivet Master
2015 30' Classic
Pleasanton
, California
Join Date: Jan 2015
Posts: 745
|
I keep a Buddypole in the rear compartment. It beats drilling holes in the AS.
__________________
Al, K6IV
2015 30' Classic, "Chez Nu"
2014 RAM 2500 w/Cummins Diesel
ProPride Hitch, 400 W Solar
|
|
|
11-18-2017, 09:35 AM
|
#5
|
Rivet Master
2020 28' Flying Cloud
2017 23' Flying Cloud
Hiawassee
, Georgia
Join Date: May 2017
Posts: 1,398
|
Quote:
Originally Posted by frjeff
I prefer not to mount on AS. But, many rv parks do not seem to have lots of room for long wire antennas.
|
I wouldn’t want to mount on th AS either, although that big piece of aluminum would make @ fine ground plane 😀
Depending on which band you want to operate you can look at a folded dipole or something like that. Forget long wire. You just want to make sure your antenna has something to work against (other half of dipole) and that you have a good match at the antenna & rig. Let me look at some of my books for ideas.
Stand by.
|
|
|
11-18-2017, 10:45 AM
|
#6
|
Fr Jeff
1989 29' Excella
Saginaw
, Michigan
Join Date: Nov 2009
Posts: 210
|
Quote:
Originally Posted by alano
I keep a Buddypole in the rear compartment. It beats drilling holes in the AS.
|
Which model did you get and are you pretty pleased with it?
__________________
Fr. Jeff
2016 F150 Ecoboost
1989 Excella 29
|
|
|
11-18-2017, 11:05 AM
|
#7
|
Half a Rivet Short
2017 30' Classic
2022 Interstate 24X
Carlisle
, Pennsylvania
Join Date: May 2017
Posts: 15,674
|
Hi
At HF, grounding will be an issue. Unless you run something like a beam or a dipole, you will get RF hot spots. The trailer is a great ground plane ... until somebody has one foot on the wet dirt and another foot on the step Without the trailer as a ground, you will have a tough time getting much efficiency out of a vertical.
A 20 meter dipole is .. errr ... about 30' long Set it up as an inverted V. Fiberglass poles to get it above the usual clutter are not that hard to come by. A "flagpole mount" on the hitch works pretty well for the center. Keeping the ends inside a typical site is normally do-able. Same basic idea works fine for 10, 15, and 20 with simple traps.
Bob
|
|
|
11-18-2017, 11:19 AM
|
#8
|
Rivet Master
2015 30' Classic
Pleasanton
, California
Join Date: Jan 2015
Posts: 745
|
Quote:
Originally Posted by frjeff
Which model did you get and are you pretty pleased with it?
|
I have the Buddypole deluxe, but if I had to choose again, I might go for the deluxe - long version. You can't have TOO much metal in the sky! The nice thing about the Buddypole is that you can configure it as a vertical or dipole - pending on your QTH.
__________________
Al, K6IV
2015 30' Classic, "Chez Nu"
2014 RAM 2500 w/Cummins Diesel
ProPride Hitch, 400 W Solar
|
|
|
11-18-2017, 02:21 PM
|
#9
|
Rivet Master
2020 28' Flying Cloud
2017 23' Flying Cloud
Hiawassee
, Georgia
Join Date: May 2017
Posts: 1,398
|
Quote:
Originally Posted by uncle_bob
Hi
At HF, grounding will be an issue. Unless you run something like a beam or a dipole, you will get RF hot spots. The trailer is a great ground plane ... until somebody has one foot on the wet dirt and another foot on the step Without the trailer as a ground, you will have a tough time getting much efficiency out of a vertical.
A 20 meter dipole is .. errr ... about 30' long Set it up as an inverted V. Fiberglass poles to get it above the usual clutter are not that hard to come by. A "flagpole mount" on the hitch works pretty well for the center. Keeping the ends inside a typical site is normally do-able. Same basic idea works fine for 10, 15, and 20 with simple traps.
Bob
|
AS as a ground plane was only a joke😂 but Bob has the right idea. You can also toss a line over a tree branch for a center support. Just make sure it’s well camouflaged and removed when you leave.
|
|
|
11-18-2017, 02:54 PM
|
#10
|
Half a Rivet Short
2017 30' Classic
2022 Interstate 24X
Carlisle
, Pennsylvania
Join Date: May 2017
Posts: 15,674
|
Quote:
Originally Posted by KK4YZ
AS as a ground plane was only a joke😂 but Bob has the right idea. You can also toss a line over a tree branch for a center support. Just make sure it’s well camouflaged and removed when you leave.
|
Hi
Actually if you put up one of the screwdriver verticals on the roof of the trailer, it makes a pretty good counterpoise for the antenna. The loss in the trailer operating as a ground is a lot less than the loss in the vertical radiator. I'm still not quite sure how people get around the "hot step" problem ....
One nice thing about an inverted V with a "flagpole" center mount - you can put a VHF vertical on the pole as well. That way you kind of have one structure to deal with each time you set up camp.
Bob
|
|
|
11-18-2017, 03:03 PM
|
#11
|
Rivet Master
2020 28' Flying Cloud
2017 23' Flying Cloud
Hiawassee
, Georgia
Join Date: May 2017
Posts: 1,398
|
https://www.dxengineering.com/search...s?autoview=SKU
There’s an example of single band dipoles. Like was mentioned before you might also consider a trap dipole for multi band operation. The nice thing about traps is they add to the electrical length of the antenna, making the required physical length of the antenna shorter and more compact. If you’re going to use coax as a feedline make sure you have a balun or you’ll end up with the feedline radiating which can have some undesirable side effects.
|
|
|
11-18-2017, 04:06 PM
|
#12
|
Half a Rivet Short
2017 30' Classic
2022 Interstate 24X
Carlisle
, Pennsylvania
Join Date: May 2017
Posts: 15,674
|
Hi
An "old time" twist on the dipole would be to feed it with ladder line and mount a tuner in the vicinity of the propane tanks. I suspect that the traps / balun / coax would be more practical.
Bob
|
|
|
11-18-2017, 04:40 PM
|
#13
|
Rivet Master
2020 28' Flying Cloud
2017 23' Flying Cloud
Hiawassee
, Georgia
Join Date: May 2017
Posts: 1,398
|
Quote:
Originally Posted by uncle_bob
Hi
An "old time" twist on the dipole would be to feed it with ladder line and mount a tuner in the vicinity of the propane tanks. I suspect that the traps / balun / coax would be more practical.
Bob
|
Actually the ladder line is a very nice way to go in my opinion. Balanced line into the tuner. Very clean.
|
|
|
11-19-2017, 07:42 AM
|
#14
|
Half a Rivet Short
2017 30' Classic
2022 Interstate 24X
Carlisle
, Pennsylvania
Join Date: May 2017
Posts: 15,674
|
Quote:
Originally Posted by KK4YZ
Actually the ladder line is a very nice way to go in my opinion. Balanced line into the tuner. Very clean.
|
Hi
The issue I see with ladder line is storage and setup. My guess is that it would be a bit of a pain after several "cycles". That might not be as true of the plastic insulated stuff as the open wire / porcelain insulator variety. I had some issues with the plastic variety early on. I tend to avoid it.
Bob
|
|
|
11-19-2017, 09:18 AM
|
#15
|
1 Rivet Member
2005 30' Classic
Edmonton
, Alberta
Join Date: Jan 2006
Posts: 5
|
Several of us use the Tarheel antenna mounted on the roof with Tarheel's "Lift and Lay kit
__________________
Bob Caldwell
WBCCI # 267
Edmonton, AB
Canada
|
|
|
11-19-2017, 09:18 AM
|
#16
|
1 Rivet Member
2018 Basecamp
Chandler
, Arizona
Join Date: Nov 2017
Posts: 10
|
We just picked up a new Basecamp. Not much room but I'm still planning to have a station available. I've tested a Buddipole and it works pretty well. Even at 15 watts (Elecraft KX3) I've worked people reliably on 40 meters. My only worry was wind pushing the whole antenna over so I devised a very simple way to hold it down. I took a 3 foot chunk of aluminum angle and drilled a single hole in it on one end that a bungy cord hook would hook to. When I set up the Airstream I simply place the non-hole end under one of the jacks at the back. When I set up my antenna I place the center of the tripod over that hole and bungy it down tight and it's not going anywhere. I tried it and had it up for 4 days while changing the antenna configuration once in a while to see what worked best. I was receiving pretty well with all of them. Good luck and have fun! Dave, AI7R Chandler, AZ
|
|
|
11-19-2017, 09:26 AM
|
#17
|
1 Rivet Member
2005 30' Classic
Edmonton
, Alberta
Join Date: Jan 2006
Posts: 5
|
Jeff, if you want to know about the Tarheel layout, my details and contact has been updated now
__________________
Bob Caldwell
WBCCI # 267
Edmonton, AB
Canada
|
|
|
11-19-2017, 10:19 AM
|
#18
|
Rivet Master
2016 27' Flying Cloud
Olympia
, Washington
Join Date: Nov 2015
Posts: 618
|
Besides Bob Caldwell, talk with Jim Cocke, the WBCCI President. Both of these guys have extensive antennas mounted on the roof of their respective AS & are active in the AS ham community.
Richard Wills
WL7Z
__________________
Richard Wills, Olympia, WA --- WBCCI 8873, WL7Z
"Aurum": 2018 Ram/Cummins 3500
"Argentum": 2016 AS FC 27 FB
RIP "BigDog": M Harlequin Great Dane, 150 lb
"St. Rocco": M Black Great Dane, 150 lb
|
|
|
11-19-2017, 01:38 PM
|
#19
|
1 Rivet Member
1989 32' Excella
Edgerton
, Kansas
Join Date: Nov 2017
Posts: 7
|
Fr. Jeff
I have worked HF mobile for the last 40 years or so. When the bands are great (solar maximum) the antenna doesn't matter that much. Today's bands, well ????.
That said, simple is better. For years I used the Hustler large coil verticals and they played well. Today I use one of the Tarheel antennas with either a 8' whip or a telescoping 12' whip for 160M. Not a perfect antenna but easy to go outside, screw to the mount, plug and play, no antennas to change when you change bands. The down side is that you really need a screwdriver antenna tuner for convenience. I use a TurboTuner. True, you can manually run the antenna up and down while watching the SWR but automatic is the way to go.
I have played with portable dipoles and Yagi's and even have one of the last Super Antennas Yagi's made by the original designer, along with the Portable Rotation rotator and a portable tripod and push pole mount. Takes about an hour to set up and guy but works really well. Unfortunately a band change means lowering the antenna and adjusting the three elements, typically a 15 to 20 minute job.
The Tarheel takes about a minute to screw into a Diamond clamp on mount and I'm on the air. Remember, if your not on the air your not working them. I almost always can make a contact including some DX when band conditions are good. In the last year I have worked most of Europe, and into the Middle East (Israel) with the antenna mounted on my Prius. My 1989 Excella 32 is a much better mount (but not going down the road). Keep it simple and sturdy.
As for the RF between the AS and the ground? Discourages people handing out Bible tracts.
Joe WK0G
|
|
|
11-19-2017, 03:21 PM
|
#20
|
Fr Jeff
1989 29' Excella
Saginaw
, Michigan
Join Date: Nov 2009
Posts: 210
|
Quote:
Originally Posted by bobcal
Jeff, if you want to know about the Tarheel layout, my details and contact has been updated now
|
Studying
__________________
Fr. Jeff
2016 F150 Ecoboost
1989 Excella 29
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|