[ARC5] NC-270 Success

[Rich Post]

The National "Cosmic Blues" are known for saturation of the power
transformers.  Here's my experience
<http://www.ohio.edu/people/postr/bapix/NC270.htm>

For a cheap bucking transformer, I recycle dead UPS, the older versions
that were still heavy after battery removal.   The case, the transformer,
the outlets are ready to go.  Just rewire a bit.   For an example, see the
bottom of this page.
<http://www.ohio.edu/people/postr/bapix/S-76.htm>

Rich KB8TAD
-------------------------------------------

On Sat, Dec 10, 2016 at 12:53 PM, Kenneth G. Gordon <
kgordon2006 at frontier.com> wrote:

> On 10 Dec 2016 at 7:02, Scott Robinson wrote:
>
> > If your power transformer gets hotter at 122V than at 110V, as in the
> > example below, the iron in it is probably saturating at the higher
> > voltage, considerably raising the primary current.  Feeding it 100V is a
> > good idea.
>
> There were several articles in Electric Radio Magazine concerning both the
> NC-270 and the
> NC-190 which uses, as I remember it, the same power transformer.
> ---   cut   -----
> I MUCH prefer bucking transformers for this use.
>
> Ken W7EKB
>
>
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