Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

copper dipole

Matronics Email Lists Forum Index -> Europa-List

View previous topic :: View next topic

Author Message

europa(at)pstewart.f2s.co
Guest

Posted: Mon Jan 07, 2008 6:49 pm Post subject: copper dipole

Anyone answer me this one.  Having spent ages soldering co-ax onto  

the copper tape supplied by the factory, I've just broked the tape in  

half!  Would a piece of copper wire be of similar efficacy as t he  

copper tape - it would certainly be easier to solder to.  I'm  

guessing its the length of the dipole that's important rather that  

width or section - true or false.



Regards



Paul

G-GIDY (running out of jobs to do)

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

davedeford(at)comcast.net
Guest

Posted: Mon Jan 07, 2008 10:51 pm Post subject: copper dipole

 	  Quote: 	
		   

 --> <europa(at)pstewart.f2s.com>

 

 Anyone answer me this one.  Having spent ages soldering co-ax onto  

 the copper tape supplied by the factory, I've just broked the 

 tape in  

 half!  Would a piece of copper wire be of similar efficacy as t he  

 copper tape - it would certainly be easier to solder to.  I'm  

 guessing its the length of the dipole that's important rather that  

 width or section - true or false.

 


	


Paul,



The length is the main factor determining the operating frequency of the

antenna, while the width of the conductors determines the range of

frequencies over which the antenna works.  Since the aviation band is rather

wide (as a percentage of the frequency), it is desirable to use wider

conductors.  It is no problem to repair a break in the copper tape with a

piece of wire soldered across the break, however.  It is definitely

mandatory to fix the coax securely to the airframe prior to soldering to the

copper tape, so any movement of the coax will not transmit stress to the

solder joints and the fragile copper tape.



Dave DeFord

N135TD

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

europa(at)pstewart.f2s.co
Guest

Posted: Tue Jan 08, 2008 1:58 pm Post subject: copper dipole

Ferg / David

Thanks for the responses - I'll try my soldering iron first



Paul

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

jimpuglise(at)comcast.net
Guest

Posted: Tue Jan 08, 2008 8:49 pm Post subject: copper dipole

Paul-

  

 FYI Aircraft Spruce has a reel of copper strapping material for $ 19.90.  For the work you may need to go through, it may be easier to buy it.  Also, as was mentioned, the advantage of strapping is that it is a bit more broad band than wire would be.  I assume that the manufacturers do it that way to provide more error in the event that you do not tune the antenna.  If you have a good Standing Wave bridge and can tune it, as long as you are below 2.5 - 3 to 1 at the extreme ends of the spectrum and close to flat at the most commonly used frequencies you will be transmitting on, wire would work just as well as strapping.

  

 Jim Puglise A-283, Punta Gorda, FL  

  

  at con  [quote][b]

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

craigb(at)onthenet.com.au
Guest

Posted: Wed Jan 09, 2008 2:45 am Post subject: copper dipole

Jim  just on the note of Standing wave bridges, I have one for AM CB radios as  commonly used truckers etc, used it every time

 I  replaced an aerial on my car and mates cars to correctly "tune" the aerial.I had  been thinking of using it to tune my aerial but

  wasnt sure if it was the correct one or not, any  thoughts

  

 craig

 [quote]   --

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

jimpuglise(at)comcast.net
Guest

Posted: Wed Jan 09, 2008 5:43 am Post subject: copper dipole

Craig-

  

 Hard to tell.  Some of them will work from HF to VHF, some will not.  Obviously, the best bet would be to use a VHF specific bridge if you can get ahold of one.  I would Google your bridge and see what the manufacturer's specifications are.  

  

 Jim 

  

 [quote]-------------- Original message -------------- 

From: "craig bastin" <craigb(at)onthenet.com.au> 

  Jim just on the note of Standing wave bridges, I have one for AM CB radios as commonly used truckers etc, used it every time

 I replaced an aerial on my car and mates cars to correctly "tune" the aerial.I had been thinking of using it to tune my aerial but

  wasnt sure if it was the correct one or not, any thoughts

  

 craig

 [quote] --

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

rampil

Joined: 04 May 2007
Posts: 870

Posted: Wed Jan 09, 2008 7:02 am Post subject: Re: copper dipole

Most consumer-type (Ha!) SWR bridges work from 1-30 MHz.

Airband VHF carrier will not excite the bridge to a full scale forward

reading, making the reverse direction reading uncalibratible. 



Look for a ham vhf meter - a bridge that works at 144 MHz will do fine

at 120.



I am not sure what "copper strapping" is.  Strapping implies mechanical

strength for binding something. Sounds heavy.  RST antennas and what

the factory supplies is very thin copper foil.  This raises an other issue

learned by many people the hard way:  Copper foil has a very different

thermal contraction rate than fiberglass.  Therefore if you glue the foil

directly to the glass and pass through a summer and a winter season,

you will most likely find that the foil has torn.  What I did was to encase

the foil antenna in wax paper and then glass the wax paper envelope

to the fuselage.



Good Luck

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

_________________
Ira N224XS

Display posts from previous:

	Matronics Email Lists Forum Index -> Europa-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum