Re: {Collins} [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115V and 230V



This is wrong.  If R = 200 ohms for 220 volt operation (2 x 100 ohm windings
in series), then R = 50 ohms for 110 volt operation (2 x 100 ohm windings in
parallel).  Power is the same.

-----Original Message-----
From: Collins [mailto:collins-bounces+gahart=ix.netcom.com@xxxxxxxxxxxxx] On
Behalf Of Stanley M Miln
Sent: Saturday, November 08, 2014 1:46 PM
To: Mariusz "Art" VE3PND; 'collins'
Subject: Re: {Collins} [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115V
and 230V

  Exelent Point Art.
      Stan K6RMR

> Gentlemen,
>
> remember that the losses in the transformer winding are:
> P=I squared  x  R
>
> which means as an eample:
>
> 1)  for R=100   and  I=10   the P= 10000 W
> 2)  for R=200   and  I=5     the P=200 x 25 = 5000 W .
>
> This means that losses (heat) under 115V are much higher than at 230V . 
> This is due to the current that is squared ...  ... non linear ...
>
> 73 Art VE3PND
>
>
>
>
>
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