[amsat-bb] Re: Helix matching

[Diane Bruce]

On Fri, Sep 27, 2013 at 08:57:50AM -0400, Robert Bruninga wrote:
> Why don?t we see simple ? wave 75 ohm lines used as a first step in
> matching a 140 Ohm Helix to 50 ohms?
> 
> 
> 
> The ? wave line would give an easy 112 ohms and then it shouldn?t be that
> hard to do a little additional construction matching to get to 140?
> 
> 
> 
> (building a 2.4 GHz pop-out helix that compresses flat for launch)
> 
> 

Clare Fowler has a neat trick

http://ww2.amsat.org/amsat/archive/amsat-bb/200001/msg00507.html

> 
> Bob, WB4APR
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