[GreenKeys] OT. Antenna materials

[Dave Wade]

On 30/11/2013 23:39, gil wrote:
> Thanks guys.  How about a 3/16 inch wood dowel with adhesive copper 
> tape wrapped around it?  Needs to be light for the balloon and I will 
> have the dowel structure.  Thx
>
>
No sure you wouldn't end up with a coil...

> Sent from my portable teletype machine.
>
I think for what you want steel tape measure would be just fine, light 
and flexible.Path is "line of sight" so efficiency probably isn't a 
prime requirement.

This is probably too big:-

http://theleggios.net/wb2hol/projects/rdf/tape_bm.htm

so use one or  two elements


Dave
G4UGM

>
> -------- Original message --------
> From: WA5CAB at cs.com
> Date: 11/30/2013 4:22 PM (GMT-07:00)
> To: gil at baudot.net,greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] OT. Antenna materials
>
>
> Yes, although you may not have equipment capable of measuring the 
> difference.  Current flows in the driven element, reflector and 
> directors.  Steel music wire would be the worst choice.  Copper wire 
> and bamboo would be better.  Copper tubing the best.  Aluminum tubing 
> is almost as good and is the usual choice because of weight and cost.
>
> In a message dated 11/30/2013 17:11:18 PM Central Standard Time, 
> gil at baudot.net writes:
>> Hey folks.  Question about making a dipole for 2m.  Does the 
>> conductor diameter matter?  I have seen everything from 1/2 inch 
>> copper pipe to steel music wire.  If you do want some thickness, I 
>> presume pipe is fine as it should mostly be skin-effect current.  
>> Does the material matter (copper vs steel vs alum)?
>> Thx gil
>>
>>
>>
>>
>> Sent from my portable teletype machine.
>
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>
>
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-- 
Dave Wade G4UGM
Illegitimi Non Carborundum

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