[Milsurplus] [Boatanchors] OK Smart People: Capacitive Voltage Divider?

[Paul Kraemer]

David
I would NOT recommend the capacitors
A small filament transformer with secondary current rating as large as 
receiver line current is all that is required to make a buck transformer. 
Something like 12v 3a filament transformer would do that.
And, it costs less and is smaller than the proper capacitors
Paul K0UYA

----- Original Message ----- 
From: "David Stinson" <arc5 at ix.netcom.com>
To: <milsurplus at mailman.qth.net>; <boatanchors at mailman.qth.net>; 
<boatanchors at theporch.com>
Sent: Saturday, March 17, 2012 9:15 PM
Subject: [Boatanchors] OK Smart People: Capacitive Voltage Divider?


> 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
>
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