Open Roads Radio forum for Ham, Amateur Radio and RV camping


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Old 11-11-2015, 11:04 AM   #11
wa8yxm
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I'd not mind going with those flag pole mounted buddy poles. but

To the O/P.. The Tarheel (Screwdriver) seems to be very popular among the RV set.. Likely for just the reasons you cite. I could support that decision.
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Old 11-12-2015, 01:18 AM   #12
WA6CDE
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Well the question still is around... where to mount the antenna... on the RV, tow vehicle, ground.... where...

Here is my two cents worth... if you put it on the RV... you only have one option.. in the RV... but if you put it on the tow vehicle...then you have not only a mobile station but also can be used when parked. The problem also comes from where to mount the radio in the RV... seems most of them I have seen appear cluttered... and rats nest of wires... but, if mounted in the tow vehicle you have a normal installation.

The second most ideal spot would be on the ground or some sort of supported fixture to hang the antenna on.

Most of the people I have run with put the HF on the front bumper when pulling a 5th wheel or other... seems to work ok... others have a dual location... front, rear or on the RV...

Still others don't put the hf in the RV.. instead they have a hand held or some other small radio... that is perminate in the RV... and only use that for local contacts.

Another item I am seeing now is HF amps... some are the solid state other are just plane old home station amps... they all require some level of vibration dampening... if they are to last... but, remember.. with all that power.. your going to have a saturated field around the antenna... and others campers may not like you blanking out their TV or getting into their CB, radio, stereo... etc... so sticking with 100 watts seems to be the ideal power level... one might consider.
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Old 11-16-2015, 10:18 PM   #13
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Quote:
Originally Posted by rgschmid63 View Post
I use an MFJ-2982 31' vertical mounted to the ladder on the back of my 5'ver about 1 foot above the bumper. It's in a 31' fiberglass telescoping mast, so I leave it mounted to the ladder and just remove the coax when ready to travel.
Hi rgschmid63,

How do you deal with the four 12' radial wires for this antenna?

Thanks in advance,

AA7US
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Old 11-17-2015, 02:49 PM   #14
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Wooooot!

New guy alert! gyropilot, jump in and join the fun!
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Old 11-17-2015, 05:27 PM   #15
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Wooooot!

New guy alert! gyropilot, jump in and join the fun!
Thanks! I'm glad to be here.

I'm a full-time RV'er who just got started in ham radio a few months ago. I stumbled upon this forum while searching the Interwebs for an HF antenna solutions to mount ON my travel trailer.

After a lot of research, I've come to the conclusion some sort of vertical antenna is probably best approach from the standpoint of a quick/easy installation and staying within the confines of an RV park campsite. But I'm struggling with how to deal with ground plane issues. My travel trailer is wood and fiberglass.

I haven't been able to find a "magic" antenna yet.

73,

John

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Old 11-17-2015, 06:29 PM   #16
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I have to tell you about a friend's motor home he had issues with his roof leaking. We climbed up on the roof and found some pretty shoddy repair work and I noticed some aluminum tape forming a big "X" on the roof and buried under some effort to seal the roof was a 10" saw blade! The tape was stuck to the saw blade and it was being used as a ground plane enhanced by the aluminum tape! No Antenna but I can't think of any thing else the set up was used for. The antenna must have been fastened to the saw blade at some point.
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Old 11-17-2015, 06:34 PM   #17
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...buried under some effort to seal the roof was a 10" saw blade!
Nice!

Personally I prefer using a pizza pan, but that's just me.

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Old 11-18-2015, 09:42 PM   #18
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Default pizza pan ground plane

I tried using a pizza pan (steel) with a mag mount ant.

seems like there just isn't enough metal there to work well as a ground plane. the signal receive level was low and it seemed noisy, compared to another antenna ( both were verticals).

what would you think of attaching 4 radials, say about 16 Ft long to the pizza pan and mag mount?

questions:

1-ground mount or on top of trailer?
2-would adding an earth ground help? I have read that a single ground rod is virtually useless for rf ground.
3-i saw an article where the ends of the 4 radials were terminated with nails (or big tent pegs) to provide some ground connection (hopefully a bit better rf ground). Would that help also?

comments please, I want to have some ideas to play around with this summer.


PS - my first paying job was as a pizza maker for Shakey's Pizza Parlor (1968?) - so I can still make a pretty decent pie when needed.
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Old 11-19-2015, 09:53 AM   #19
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I tried using a pizza pan (steel) with a mag mount ant.

seems like there just isn't enough metal there to work well as a ground plane.
While the ol' pizza pan trick works well for VHF/UHF, it's not nearly large enough for an HF antenna. The noise you heard was likely common mode RF current coming back down the coax as it (the coax) was forced to become the missing half of your antenna due to the lack of an adequate ground plane. This seems to be a typical problem when trying to cut corners with HF antennas.

Quote:
what would you think of attaching 4 radials, say about 16 Ft long to the pizza pan and mag mount?
At the RV park we're currently staying through the end of November, I really don't have room to run out ground radials. My nearest neighbor's RV is only 2.5' from mine on one side!

Around the beginning of December we'll begin boondocking for several months out in the desert north of Yuma at the BLM's Imperial Dam LTVA. Out there I'll have plenty of room to set up an HF antenna separately (away) from my travel trailer. On my short list for this is a Buddipole antenna system using a dipole for 10M or 20M and a vertical on the lower bands mounted on either 8' and/or 16' guyed masts. I'll also be able to run out ground plane radial wires without any problem.

After establishing a performance baseline using some of the Buddipole antennas erected away from our travel trailer, next I plan to experiment with some of the same antennas (particularly the verticals) mounted to our ladder of our travel trailer on top of a painter's pole. I'm going to experiment with draping the ground radials down and then around our travel trailer (maybe in a spiral fashion to contain the footprint) and see what happens to the antenna performance.

Quote:
PS - my first paying job was as a pizza maker for Shakey's Pizza Parlor (1968?) - so I can still make a pretty decent pie when needed.
I'm craving pizza just thinking about it!

73,

John
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Old 11-19-2015, 06:18 PM   #20
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Every thing attached to my camper radio etc. is grounded to the frame work the.power line ground from the camp ground is grounded as is your 120 volt panel box so you may actually have a pretty good ground plane.
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