| Author |
Message |
    
Radiodude
Intermediate Member
Username: Radiodude
Post Number: 418
Registered: 1-2002
| | Posted on Wednesday, June 09, 2004 - 7:09 pm: | 
|
Lets say you have an airplane. Now you take a multiple magnet mag mount and stick it to the UNDERSIDE of the plane set your swr and take the plane up. The question is what is the polarization of the antenna?? |
Allagator
Intermediate Member
Username: Allagator
Post Number: 317
Registered: 9-2002
| | Posted on Wednesday, June 09, 2004 - 7:39 pm: |
|
HUMMMMM GOOD QUESTION !!!!!!! |
Lowpowerhal
Intermediate Member
Username: Lowpowerhal
Post Number: 251
Registered: 7-2003
| | Posted on Wednesday, June 09, 2004 - 9:05 pm: |
|
It would be non ground and be veritical polaization , just as marine radio, except not under water of course.But there is going to be a sticker of a question. where to mag mount the the antenna? Aluminum and magnets doint stick.If you found a place to stick it, It would come lose by the wind speed.
Just my thoughts could be wrong though! |
Dindin
Intermediate Member
Username: Dindin
Post Number: 160
Registered: 2-2004
| | Posted on Wednesday, June 09, 2004 - 9:13 pm: |
|
for starters,vertical polarity.secondly,no matter how many magnets you use they wont"stick"to the bottom of an airplane(fiberglass or aluminum).thirdly the F.A.A really,REALLY frowns on you "sticking"anything on the outside of your plane.(they dont want any thing falling off your plane and hitting KB in the head)as a sidebar if you could do all that(theoreticly)and flew a knife edge maneuver your polarity would then be horizontal. |
Radiodude
Intermediate Member
Username: Radiodude
Post Number: 419
Registered: 1-2002
| | Posted on Wednesday, June 09, 2004 - 10:11 pm: |
|
Oh Was sure you all knew that or assumed that a large piece of sheet metal was pop riveted to the underside!
But if you move the metal sheet to the side...then what do you have??? |
Allagator
Intermediate Member
Username: Allagator
Post Number: 320
Registered: 9-2002
| | Posted on Wednesday, June 09, 2004 - 10:26 pm: |
|
what you would have would be a flying lightning rod !!!! LOL but then on its side it would be horz then just like a beem !!! |
Jon666
Intermediate Member
Username: Jon666
Post Number: 224
Registered: 11-2003
| | Posted on Wednesday, June 09, 2004 - 11:13 pm: |
|
boy now ive heard it all
a flying antenna
i bet you would have to have
alot of coax hehe |
Tech833
Moderator
Username: Tech833
Post Number: 733
Registered: 8-2002
| | Posted on Thursday, June 10, 2004 - 12:07 am: |
|
Been there, done that.
If you mount the antenna to the bottom of the plane and it sticks straight down, it is vertical.
Years ago, we did that in a remote area using lowband (CB) radios due to terrain. The ground crews could hear us in the plane with full scale no matter what, but could still not hear each other.. It was neat. Our gutter mount antenna was mounted to the landing gear strut horizontally with riggers tape over hose clamps (rented plane). The radio was some CB that was 23 channels (that's all there was back then) but all the controls and speaker were in the microphone, which was large. |
Mikefromms
Intermediate Member
Username: Mikefromms
Post Number: 197
Registered: 6-2003
| | Posted on Thursday, June 10, 2004 - 7:37 am: |
|
Up there in the air all you would need is a walkie talkie. Talk for a 100 miles.
mikefromms |
Tech833
Moderator
Username: Tech833
Post Number: 734
Registered: 8-2002
| | Posted on Thursday, June 10, 2004 - 10:43 am: |
|
O.K. Mike, good observation. Now, answer your own question when it comes to elevation improving your coverage.
Will raising your antenna improve your coverage? You bet. Unless you use lossy cable to feed it. That is why I sing the praises of double shield cable (Like Times LMR series) and Heliax. Otherwise, most benefit of elevation is lost. |
Mikefromms
Intermediate Member
Username: Mikefromms
Post Number: 199
Registered: 6-2003
| | Posted on Thursday, June 10, 2004 - 2:40 pm: |
|
But it would take 1000's of feet of coax to reach that airplane from my house. Is Times LMR series that good? he..he..he..ha..ha..ha..ha.
mikefromms |
Hawk1
Junior Member
Username: Hawk1
Post Number: 40
Registered: 11-2003
| | Posted on Thursday, June 10, 2004 - 4:14 pm: |
|
if in a plane i would just trail a dipole wire behind me ....hk |
Dindin
Intermediate Member
Username: Dindin
Post Number: 163
Registered: 2-2004
| | Posted on Friday, June 11, 2004 - 5:27 pm: |
|
Hawk1,I just happen to have a Collins HF antenna coupler used just for that porpose,figure someday I would put it up on the tower for my swl longwire which hasn't got put up yet. |
Tech833
Moderator
Username: Tech833
Post Number: 740
Registered: 8-2002
| | Posted on Monday, June 14, 2004 - 1:34 pm: |
|
Mike,
I think you know what I meant. |
