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
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