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First successful test of windscreen antenna
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pitts_pilot(at)bellsouth.
Guest

Posted: Tue Nov 03, 2009 4:04 pm Post subject: First successful test of windscreen antenna

Phil, it's true.  All antennas are FM. <GR>  And then some feed pipes. 

Sheesh.

Linn



Perry, Phil wrote:

 	  Quote: 	
		   

 

 Hi Pascal,

 

 I never sent my original e-mail because I couldn't figure out how to

 communicate the issue without sounding really really rude or offensive

 and that's not my goal.  So those messages got typed and then I deleted

 them.

 

 But Phil White cracked the door enough for me to open up for a few

 seconds.

 

 As John Cox mentioned, go find a ham who has been around for awhile and

 ask them to visit your project for a few hours.  If they're the

 old-school type who built their own antennas and transceivers (AKA:

 home-brew type), they'll jump right on the project and be able to

 provide very valuable experience, tools, and measuring equipment.

 

 I've heard that antennas operate on FM.  That's not really true, there's

 a science to it.

 

 I'll let you figure out what FM is.  

 

 Phil

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pitts_pilot(at)bellsouth.
Guest

Posted: Tue Nov 03, 2009 4:04 pm Post subject: First successful test of windscreen antenna

Dj missed it.

Linn

do not archive



Dj Merrill wrote:

 	  Quote: 	
		   

 

 On 11/03/2009 04:38 PM, Perry, Phil wrote:

> I've heard that antennas operate on FM.  That's not really true, there's

> a science to it.

>

> I'll let you figure out what FM is.  

>

>   

 

     Another hint - our aviation COM radios work on AM frequencies

 (Amplitude Modulation).  You can find info on AM at

 <http://en.wikipedia.org/wiki/Amplitude_modulation> and FM at

 <http://en.wikipedia.org/wiki/Frequency_modulation> if you are

 interested in learning more.

 

     <http://www.arrl.org/> is a good place to start if you want to learn

 about antenna construction.

 

 fyi

 

 -Dj

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Kellym

Joined: 10 Jan 2006
Posts: 1706
Location: Sun Lakes AZ

Posted: Tue Nov 03, 2009 4:48 pm Post subject: First successful test of windscreen antenna

You could consider that Bob Archer makes a com antenna that will go in 

which ever wing tip you don't put the vor antenna. Won't have the range 

of external antenna, but for a com 2 should be fine. The wing tip has 

enough vertical to give it proper orientation, as I've seen one 

installed in an RV7 wingtip that worked fine.



Michael Wellenzohn wrote:

 	  Quote: 	
		   

 

 Hi Phil,

 

 since I am the one who started the topic I thank you for sharing your insides here. I couldn't find any "real" answer before in the forum. My COM 1 is an external antenna and I thought that the com 2 would be fine on the center bar. Having read your statements above will change my installation.

 

 Cheers

 Mike

 

 --------

 RV-10 builder (avionics, wiring)

 #511

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p 70845#270845

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

deej(at)deej.net
Guest

Posted: Tue Nov 03, 2009 5:12 pm Post subject: First successful test of windscreen antenna

Linn Walters wrote:

 	  Quote: 	
		   



 Dj missed it.

 Linn


	


    It is not the first time...  *grin*



-Dj

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pitts_pilot(at)bellsouth.
Guest

Posted: Tue Nov 03, 2009 5:22 pm Post subject: First successful test of windscreen antenna

Dj Merrill wrote:

 	  Quote: 	

 Linn Walters wrote:

> 

>

> Dj missed it.

> Linn

    It is not the first time...  *grin*

You just took the subject too seriously.  I could tell you really wanted 

to help, and you get kudos for that.  I've found the FM thingy (another 

highly technical term) rampant through all the military branches. 

Probably coined by instructors that really didn't know what they were 

talking about!!!

Linn .... heard it in the Navy.

do not archive

 	  Quote: 	

 -Dj

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Phil.Perry(at)netapp.com
Guest

Posted: Tue Nov 03, 2009 8:45 pm Post subject: First successful test of windscreen antenna

Just getting ready fir bed and realized that I should clarify the math a bit. That is the quarter wavelength "in feet".

 

 Phil

 

 

 

 ---

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