| Author |
Message |
    
Wolverine
Intermediate Member
Username: Wolverine
Post Number: 221
Registered: 2-2003
| | Posted on Thursday, September 16, 2004 - 2:35 am: | 
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Thanks Viking, you had me going for a minute, because I thought that you thought I was trying to install a "Hamstick" of sorts (usually on a big rig truck). You said to place the antenna, smack dab in the middle of the roof. That should be right behind the moonroof glass, depending on the luggage rack. I planned on doing just that. I just didn't know if the rack would interfere with the antennas radiation field. Thanks again. If anyone else out there has had this problem, please chime in.
Wolverine. |
Wolverine
Intermediate Member
Username: Wolverine
Post Number: 222
Registered: 2-2003
| | Posted on Thursday, September 16, 2004 - 2:36 am: |
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Thanks Viking, you had me going for a minute, because I thought that you thought I was trying to install a "Hamstick" of sorts (usually on a big rig truck). You said to place the antenna, smack dab in the middle of the roof. That should be right behind the moonroof glass, depending on the luggage rack. I planned on doing just that. I just didn't know if the rack would interfere with the antennas radiation field. Thanks again. If anyone else out there has had this problem, please chime in.
Wolverine. |
Tech548
Moderator
Username: Tech548
Post Number: 299
Registered: 5-2004
| | Posted on Saturday, September 18, 2004 - 3:33 pm: |
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Wolverine
Mag-mount antennas do indeed see a groundplane but the antenna itself is grounded only through the radio via its coax. Personally, I do not like using ungrounded antennas especially since everything else is grounded.
Mag antennas are designed as a convienance for people who do not like to drill holes in their vehicles. Performance come second. In the Ham world, rarely will you see a RF amplifier running into an ungrounded antenna system.
In one of the above posts, someone mentioned the use of a fender mount. That's a good idea as long as a good 1/2 or 5/8 wave antenna is used.
Jeff
Tech548 |
Patzerozero
Intermediate Member
Username: Patzerozero
Post Number: 102
Registered: 7-2004
| | Posted on Saturday, September 18, 2004 - 10:05 pm: |
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wolverine, did you do the install on the lexus yet? just curious to know the results and any after effects-dashboard lites, effects on vehicles' performance/drivability, anything else.
thanks-pat |
Wolverine
Intermediate Member
Username: Wolverine
Post Number: 223
Registered: 2-2003
| | Posted on Tuesday, September 21, 2004 - 3:11 am: |
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Patzerozero, the installation was completed as of the morning of september 20. I had a 3 day weekend. The installation was perfect. The only problems, was that my neighbor didn't have any modulation coming out of the radio (I replaced the 9 volt battery in the mike). 2nd, at first the swr kept spiking in the red on all 40 channels ( I replaced his old 6' patch cord with a 3' of mini-8). lastly, his radio kicks out 3.5 to 4 watts. I explained to him to always run his 2 pill on low, so as not to overdrive the amp (his radio doesn't have a variable). We fired it up and got good modualation and signal reports from 15 miles away. Comments like "loud and proud", and all kinds of flowers, had my neighbor grinning from ear to ear, which made me very happy. I used to working or ruining my own equipment thru trial and error, and not anyone else's. I'm happy that the installation went without a hitch, with no rf interfering with any electronics.
Wolverine. |
Patzerozero
Intermediate Member
Username: Patzerozero
Post Number: 118
Registered: 7-2004
| | Posted on Sunday, September 26, 2004 - 7:02 pm: |
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thanks, W., just curious how some modern vehicles react to rf being force fed thru their computers. glad it all worked out well. ah, yes, trial and error. i've erred a few times myself........ |
Wolverine
Intermediate Member
Username: Wolverine
Post Number: 228
Registered: 2-2003
| | Posted on Tuesday, September 28, 2004 - 6:01 am: |
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Patzerozero, Bigbob once posted that as long as the antenna is mounted above all the glass (Roofline), then you will never run into problems when running an amp. A trunk-lipped, or rear-bumper mounted antennas may or will create problems, because the rf is going right through the passenger compartment, into the dashboard, via the rear window. I wonder what a baby would be subjected to, while sitting in one of those rear-facing baby seats, when a 500 watt amp is being run, with a trunk-lipped antenna?.
Wolverine. |
Barracuda
Intermediate Member
Username: Barracuda
Post Number: 267
Registered: 3-2003
| | Posted on Tuesday, October 19, 2004 - 10:37 pm: |
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Tech584,
I have been told by some very knowledgable engineers in my area that the mag mount (the type integrated into the antenna as opposed to the separate types) are capacitively coupled to the metal they are on and that to counteract that capacitive reactance the load coil has a bit of extra inductance. In that case, the antenna is coupled to the ground plane (as I understand it). True or False?
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Barracuda
Intermediate Member
Username: Barracuda
Post Number: 269
Registered: 3-2003
| | Posted on Wednesday, October 20, 2004 - 5:16 pm: |
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Tech548,
I apologize,in my prior post I typed your handle wrong.
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Hoskinmage
Junior Member
Username: Hoskinmage
Post Number: 30
Registered: 3-2002
| | Posted on Saturday, October 23, 2004 - 9:06 am: |
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i run avr9000,a black cat 300 and a fraincess 5ft. i noticed i had a standing wave problem i would get it down to 1.5 and all of a sudden it wenty through the roof a full meter full,i never heard of a francis going bad but after checking everthing out i checked my ant. out it looks good no brakes grounded good and i switched a 3 ft.francis and my standing wave went down.has anyone else have a problem like this?i scratched off the top but couldnt see anything bot a copper tube(?)and i dont see how it could go bad.all the connections are good and its grounded.i wonder what made it go bad or is it a defect?
thanks copper for being there
crybaby,273 and cef#372
in kentucky |
Mrgoody
New member
Username: Mrgoody
Post Number: 6
Registered: 1-2005
| | Posted on Sunday, February 27, 2005 - 12:18 pm: |
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Hi guy's I was reading the question wolverine had ask regarding the wilson mag mount and the interferance that it might cause in the vehicle computer.I recently ordered a wilson 1000 myself (haven't gotten it yet)but..I'm going to be using the ant with a cobra 148 gtl.,and a 200p amp now.... what I really need to know is if I choke the antenna with about 6 roll's @8" ground it to the frame of the car and ground the battery too, will I be looking for trouble.Oh and by the way the setup will be going on a 98 Buick lesabre..... and also where about on the antenna do I start the ground wire to be mounted on the frame. |
Tech808
Moderator
Username: Tech808
Post Number: 5041
Registered: 8-2002
| | Posted on Sunday, February 27, 2005 - 12:25 pm: |
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Mrgoody,
We have used the Wilson 1000's for many years now on Everything and have had NO Computer problems.
No Need to choke anything.
Lon
Tech808
CEF808
N9OSN |
Mrgoody
New member
Username: Mrgoody
Post Number: 7
Registered: 1-2005
| | Posted on Monday, February 28, 2005 - 1:18 pm: |
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Hey Lon: thank's... haven't gotten the setup yet as of 12:30p but i do hope to get it today though,and if I need to I will surely call back upon you again. |
Mrgoody
New member
Username: Mrgoody
Post Number: 8
Registered: 1-2005
| | Posted on Monday, February 28, 2005 - 1:22 pm: |
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Oh hey Lon:mrgoody again here...about grounding the antenna /on what part of the ant. do I start my ground. |
Tech808
Moderator
Username: Tech808
Post Number: 5051
Registered: 8-2002
| | Posted on Tuesday, March 01, 2005 - 12:36 am: |
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Mrgoody,
I have never found that I needed to ground the Wilson Mag Mount Antennas.
Just place them on the roof and start talking.
I have used the Texas Star 667, KL-300p and KL-400 and KL-500 with NO PROBLEMS and NO MARKS on the Vehicles.
Lon
Tech808
CEF808
N9OSN |
Mrgoody
New member
Username: Mrgoody
Post Number: 9
Registered: 1-2005
| | Posted on Tuesday, March 01, 2005 - 2:26 pm: |
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ok Lon and thank's again...checked with ups tracking and the setup should arrive today |
Mrgoody
Junior Member
Username: Mrgoody
Post Number: 11
Registered: 1-2005
| | Posted on Sunday, March 06, 2005 - 12:13 pm: |
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Hi Lon. got every thing setup in the car...now I have a couple of more question for ya..when modulating with the amp on (kl-200p)is it good for the needle to swing over in the red on the radio's meter |
Tech808
Moderator
Username: Tech808
Post Number: 5128
Registered: 8-2002
| | Posted on Sunday, March 06, 2005 - 1:05 pm: |
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Mrgoody,
I am not sure what you mean on the SWR Reading?
I NEVER use or even look at the meters in radios as 90% are wrong to start with and I personally DO NOT TRUST THEM!
Check it with a Good EXTERNAL SWR/WATT Meter and then you will know for sure.
Hope this helps,
Lon
Tech808
CEF808
N9OSN
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Karls357
New member
Username: Karls357
Post Number: 4
Registered: 8-2005
| | Posted on Thursday, August 25, 2005 - 7:38 pm: |
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HELLO DOES ANY BODY HAVE EXPERIANCE WITH WHAT WORKS BEST ON MOTOR HOMES DUELS /SINGLE ANTENNA TYPE ? THANK YOU |
Alsworld
Advanced Member
Username: Alsworld
Post Number: 950
Registered: 1-2002
| | Posted on Friday, August 26, 2005 - 12:06 am: |
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Karls357,
try and start a new post on this. Explain your motor home (metal or fiberglass), big metal mirrors or the way you plan to mount, etc.
You will get better replies with a new post talking specifically about single vs cophasing your antenna on a motorhome. Give that a shot.
Alsworld |
Weston96
New member
Username: Weston96
Post Number: 4
Registered: 5-2004
| | Posted on Saturday, September 10, 2005 - 1:37 am: |
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I have a 98 Jeep Cherokee, and would appreciate suggestions as to the best location for an antena. I know the best place would be the roof, but I carry things on the rack. Any help would be greatly appreciated. I have a Cobra 75WX-ST and also plan on installing an amp (KL-40).
Thank you
Don |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 1434
Registered: 7-2004
| | Posted on Saturday, September 10, 2005 - 8:46 am: |
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look for an (aftermarket) external spare tire carrier, the swing away type that mounts off the rear corner above & below the taillights. (if you don't plan on actually using it, a light duty STEEL one will work fine). weld a piece of HEAVY steel plate, or channel to the top of the mount, at the height you'd want the the mount you'd like to use to be situated. then weld the mount to the top of the plate/channel & attach antenna as if it were roof mounted. using channel would allow you to run coax semi-contained/protected. did this on my K5 blazer-fiberglas roof doesn't allow grounding too well! & didn't want antenna so far up front since BIG amps were in back cargo area. swr's & reflect were as good as on my durango |
