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Re: Topband: CAT5 twisted pair

To: Charlie Cunningham <charlie-cunningham@nc.rr.com>, "jim@audiosystemsgroup.com" <jim@audiosystemsgroup.com>, "topband@contesting.com" <topband@contesting.com>
Subject: Re: Topband: CAT5 twisted pair
From: James Rodenkirch <rodenkirch_llc@msn.com>
Date: Mon, 12 Aug 2013 16:03:37 -0600
List-post: <topband@contesting.com">mailto:topband@contesting.com>
OH...okee dokee on not needing the 2:1 xfmr 
 
> From: charlie-cunningham@nc.rr.com
> To: jim@audiosystemsgroup.com; topband@contesting.com
> Date: Mon, 12 Aug 2013 17:12:59 -0400
> Subject: Re: Topband: CAT5 twisted pair
> 
> Jim,
> 
> I completely agree with Jim Brown!  I noted those 2:1 transformers the other
> day and  meant to send you a note to say that I wouldn't bother!  That
> little bit of mismatch loss won't make any difference!
> 
> 73,
> Charlie, K4OTV
> 
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Jim Brown
> Sent: Monday, August 12, 2013 5:03 PM
> To: topband@contesting.com
> Subject: Re: Topband: CAT5 twisted pair
> 
> On 8/12/2013 1:50 PM, James Rodenkirch wrote:
> > as well as a 2:1 transformer just prior to the input to the shack.
> 
> While there's nothing wrong with attempting to match the termination Z, 
> don't assume that it will do much. The input Z of the RX may not be 50 
> ohms (although the doc may say it is), a small mismatch won't contribute 
> enough loss to matter, and it does not affect noise rejection. What 
> matters is balance and twisting.
> 
> 73, Jim K9YC
> _________________
> Topband Reflector
> 
> _________________
> Topband Reflector
                                          
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