[Antennas] ladder line questions

Sun, 16 Nov 2003 19:06:23 -0600

Two 50-ohm coaxes form a shielded 100-ohm balanced line.

73/72, George   
Amateur Radio W5YR -  the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
"Starting the 58th year and it just keeps getting better!"
[email protected]

----- Original Message ----- 
From: "Hue Miller" <[email protected]>
To: <[email protected]>
Sent: Sunday, November 16, 2003 4:43 PM
Subject: Re: [Antennas] ladder line questions

> 
> ----- Original Message ----- 
> From: "HSHK" <[email protected]>
> 
> "....Besides using a 4:1 balun and then running coax, you can
> do away with the balun and use balanced coax.
>  
> If you'd like to make some ladder line, the attached pics will
> show...
>  Bill KA8VIT"
> 
> Bill, attachments don't make it thru the list reflector.  Are the
> photos up somewhere else where i could have a look?
> 
> Also- is this correct: the 2 coaxes run this way, as a balanced
> coax, 4x the impedance of the single coax?
> 
> And if so- let's say we do this, raising the impedance, let's say
> we then want to retain the balanced coax idea ( more for noise
> suppression and ground independence ) but want to have the
> line impedance the same as for a single coax span. How many
> "balanced coax" pairs do we need in parallel? 2 or 4? Just
> curious.
> Tnx, Hue Miller
> 
> - - - 
> 
> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
> _______________________________________________
> Antennas mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/antennas