[Boatanchors] OK Smart People: Capacitive Voltage Divider?

[James Liles]

Good morning Dave:

Installing a capacitor in series with the primary will actually increase the 
secondary voltage.  The reactance of the capacitor counters the inductive 
reactance having the opposite effect of the bucking transformer.

Bucking transformer is the way to go.

Kindest regards Jim K9AXN

--------------Original message ----------------------------


Message: 3
Date: Sat, 17 Mar 2012 21:15:56 -0500
From: "David Stinson" <arc5 at ix.netcom.com>
Subject: [Boatanchors] OK Smart People: Capacitive Voltage Divider?
To: <milsurplus at mailman.qth.net>, <boatanchors at mailman.qth.net>,
<boatanchors at theporch.com>
Message-ID: <28449721637B4D78B9942D21DFDCE826 at DaddyPC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original

I'm resurrecting a National NC-100A.
Sounds beautiful.  Nice AM, BCB and SWL rig.
One problem:  our blasted 125 Volt AC power lines.
This rig wants 110 volts and 125 is very tough on it.
There is no room to hog-wire in a bucking transformer,
so that's out.   Niether can I dedicate a variac to running
this receiver.
I understand one can use capacitors as an
AC voltage divider by placing one in series with
a leg of the transformer primary and one across the
transformer primary.

How can a dummy who can barely do the math
needed to number book pages determine what
values to use to drop this primary voltage from
125 to 110? Or even if it will work?
Easy!  He askes the dozens of people
smarter than him on the mailing lists.
Ain't that cool?  ;-)

TNX ES 73 DE Dave AB5S