[R-390] Balance Caps

Steve Hobensack stevehobensack at hotmail.com
Mon Sep 22 07:43:15 EDT 2014




I adjusted for a dip at the junction of two 100 ohm resistors (200 ohms balanced). That way, it is balanced for my ham band 50 ohm antenna through a simple 4 to 1 balun.
Steve N8YE

> Message: 4
> Date: Sun, 21 Sep 2014 16:51:37 -0700
> From: "Craig Heaton" <hamfish at efn.org>
> To: <r-390 at mailman.qth.net>
> Subject: [R-390] Balance Caps
> Message-ID: <000001cfd5f6$fcaf1f00$f60d5d00$@org>
> Content-Type: text/plain;	charset="us-ascii"
> 
> To All:
> 
> For what it is worth, something I printed from Chuck's website years ago.
> Hope Chuck doesn't mind.
> 
> Balance Caps
> 
> Note: It is my opinion that this is an important step which is often
> overlooked. You're basically nulling out any signals that are not balanced.
> Some noise is of this type. This adjustment can make the receiver quieter in
> the presence of common-mode noise.
> 
> Connect the signal generator to the junction of two 68 ohm resistors.
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