[Amps] transformer secondary winding resistance here we go again

Steve Thompson g8gsq at qsl.net
Wed Jan 21 08:51:17 EST 2004


On Tuesday 20 January 2004 18:20, RFlabnotes at aol.com wrote:
> Chuck:
>        The key to your statement is "...is capable of handling....",
> whatever that is supposed to mean. The basic fact is that if the secondary
> has R ohms of resistance, then with a load of I amperes it is going to
> produce, at a MINIMUM, a heat loss of I-squared-R watts................

And don't forget it's the rms value of current to use here. With a capacitor 
input supply, rms current can be several times the dc current so (Irms 
squared) can easily be 5x (Idc squared).

Steve


More information about the Amps mailing list