HF mobile operation
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06-13-2008, 13:37
Post: #1
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HF mobile operation
Greetings:
I recently upgraded my amateur radio license to Extra: Anybody operating HF mobile from their coach? Any tips about antennas or other issues such as conductive body panels? Thanks-- M.R.Kane KB1JTB 1985 PT40 currently Sanger, TX |
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06-14-2008, 02:36
Post: #2
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HF mobile operation
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06-14-2008, 04:04
Post: #3
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HF mobile operation
Congratulations on upgrading to Extra Class.
There are a lot of mobile antennas being marketed today. I have had good luck with the screw driver type antennas. They are available that will tune 80 thru 6 meters with really low swr. Of course, dummy loads have low swr. You could mount one of the screwdriver antennas on the goat rail and raise it after stopping. I have operated mobile over the years but I don't think I would try it in while driving a bird. Driving while hamming is distracting and I don't think I give adequate attention to either. I don't want to be distracted while herding 16 tons down the road. Just my two cents worth. Marv - KG7V 2004 M380 Ocean Shores, WA --- In WanderlodgeForum@yahoogroups.com, "mrkane1952" <mrkane@...> wrote: > > Greetings: > > I recently upgraded my amateur radio license to Extra: Anybody > operating HF mobile from their coach? Any tips about antennas or other > issues such as conductive body panels? > > Thanks-- > > M.R.Kane > KB1JTB > 1985 PT40 > currently Sanger, TX > |
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06-14-2008, 04:39
Post: #4
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HF mobile operation
Marv, That's a pretty impressive call sign
Brad K5RLD BradBarton00LXiDFW bbartonwx@...
Enjoy 5 GB of free, password-protected online storage. Get Windows Live SkyDrive. |
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06-14-2008, 08:51
Post: #5
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HF mobile operation
Congratulations as well on the upgrade! Loading HF while in motion can be interesting with a lot of variables. Years ago I ran HF from a Peterbilt tractor while hauling steel with a flatbed. I used a Hustler mast with separate loading coils for each band. When in motion, the wind would push the heavy spring mounted mast back at a 30 degree angle from the sleeper. Surprisingly, it worked and I would run 40 meter cw at night on long stretches of highway. The newer automatic antenna tuners are reasonably priced and work extremely well. I use two tuners in a marine installation, but plan to install one in my bus. As Marv mentioned, an antenna mount and vertical antenna attached to the goat rail would be an excellent choice for stationary use only due to the height. In this application, a steel ¼ wave 108" CB antenna works well. The screwdriver antenna Marv mentions does not require an antenna tuner, but rather a close watch on a thru-line wattmeter to insure that the antenna is manually tuned properly. I have considered a horizontal long wire on top of the bus, supported by several inch long spring loaded non-metallic stubs, but this is far from ideal because of the close proximity to the metal coach roof and goat rail. If you wanted to operate while moving, you certainly could attach a vertical to a trailer hitch. If you plan on using an automatic tuner, it would be best to mount the tuner as close to the antenna and feed it with either GTO-15 high voltage wire or non-grounded RG213, RG-8 or 8X. This past year, I have logged eleven Wanderlodge hams in a spreadsheet, amateurs discovered via QST or Wanderlodge related forums. If anyone would like to share and update this list, please email me. Donn KW2G 76FC33 South Kingstown, RI dwatson(at)oceaninlay(dot)com PS: I once knew a W1JTB From: WanderlodgeForum@yahoogroups.com [mailto:WanderlodgeForum@yahoogroups.com] On Behalf Of mrkane1952 Sent: Friday, June 13, 2008 9:38 PM To: WanderlodgeForum@yahoogroups.com Subject: [WanderlodgeForum] HF mobile operation Greetings: I recently upgraded my amateur radio license to Extra: Anybody operating HF mobile from their coach? Any tips about antennas or other issues such as conductive body panels? Thanks-- M.R.Kane KB1JTB 1985 PT40 currently Sanger, TX _,_._,___ |
06-14-2008, 09:06
Post: #6
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HF mobile operation
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06-14-2008, 13:26
Post: #7
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HF mobile operation
Brad:
When I upgraded to Extra back in he 90's that is the call the FCC issued to me. Since I am predominately a CW operator I was ecstatic with with KG7V. It really flows off the key. Talking about calls, one of my very best friends passed away last month and he had one of the best call available. He was W4DX. There will be a ton of applications when that one becomes available for reissue. Maybe I will run into you on the air sometime. Marv - KG7V 2004 M380 Ocean Shores, WA --- In WanderlodgeForum@yahoogroups.com, brad barton <bbartonwx@...> wrote: > > Marv, That's a pretty impressive call sign > Brad K5RLDBrad Barton 00LXiDFW bbartonwx@... > > > To: WanderlodgeForum@...: marvwheeler@...: Sat, 14 Jun 2008 16:04:58 +0000Subject: [WanderlodgeForum] Re: HF mobile operation > > > > > Congratulations on upgrading to Extra Class.There are a lot of mobile antennas being marketed today. I have had good luck with the screw driver type antennas. They are available that will tune 80 thru 6 meters with really low swr. Of course, dummy loads have low swr. You could mount one of the screwdriver antennas on the goat rail and raise it after stopping.I have operated mobile over the years but I don't think I would try it in while driving a bird. Driving while hamming is distracting and I don't think I give adequate attention to either. I don't want to be distracted while herding 16 tons down the road.Just my two cents worth.Marv - KG7V2004 M380Ocean Shores, WA--- In WanderlodgeForum@yahoogroups.com, "mrkane1952" <mrkane@> wrote:>> Greetings:> > I recently upgraded my amateur radio license to Extra: Anybody> operating HF mobile from their coach? Any tips about antennas or other> issues such as conductive body panels?> > Thanks-- > > M.R.Kane> KB1JTB> 1985 PT40> currently Sanger, TX> > > > > > > > _________________________________________________________________ > Enjoy 5 GB of free, password-protected online storage. > http://www.windowslive.com/skydrive/overview.html? ocid=TXT_TAGLM_WL_Refresh_skydrive_062008 > |
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06-14-2008, 14:26
Post: #8
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HF mobile operation
Marv,
I'm just a tech/meteorologist with a two-meter rig in the office and one at home, nothing mobile. You CW guys are the real hams. BradBarton00LXiDFW bbartonwx@...
Enjoy 5 GB of free, password-protected online storage. Get Windows Live SkyDrive. |
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06-14-2008, 20:12
Post: #9
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HF mobile operation
Donn,
Add another.....
N6PSY (Amateur Extrra)
Kevin McKeown
Yorba Linda, CA
1986 38' PT
Vote for your city's best dining and nightlife. City's Best 2008. |
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06-15-2008, 03:21
Post: #10
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HF mobile operation
Thanks for the replies.
Attended the Plano hamfest yesterday---won a 2008 ARRL Handbook as door prize---and was able to talk to the fellow from Tarheel Antennas. He said the bottom of the exposed coil section should be above the roof line for best function on a metal-bodied vehicle. That rules out mobile operations from a BB due to the resulting excessive overall height. He had scrapbooks picturing customers' installations, which included a late-80's FC in Tennesee. It was using a motorized tip-up mount inside the goat rail on the street side near the back. Most of the places my travels have taken me in the coach have no trees suitable for a long wire antenna--lots of mesquite in TX and NM, but they only get about shoulder high. Up 'til now, I've been using a Buddipole on a tripod or push-pole with my Ten-Tec Jupiter, in combination with an amplified vertical receiving antenna with my Drake R8B. I could search for signals with the R8 omni-directional vertical, then hand orient the Buddipole for the transceiver. Set-up with the Buddipole was tiresome when I was driving more often, and susceptible to misadventure from winds and neighbors. Seems a roof-mount tilting vertical or a push-up mast make the most sense. Portable (stationary) operation eliminates issues with engine noise and rf interference with onboard systems, I guess, although a purely mechanical non-DDEC DD ought to be just about bullet proof. M.R.Kane KB1JTB 1985 PT40 currently Sanger, TX |
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