Quote:
Originally Posted by W9TR
I think, but I’m not sure because of the marketing mumbo-jumbo that the Powerhouse 7.2 is a balanced power transformer in a really nice enclosure.
You can look up ‘balanced power’ and find a number of vendors like Furman, Equitech, and Toroid Corporation of America.
Tom
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The Richard Gray unit will perform two functions, isolation and voltage step-down to 120v ( the secondary has fewer windings which drops the voltage).
The Furman unit only provides isolation ( input to output) 120v in 120v out balanced.
The secondary windings of both units will have a center-tap which is grounded. If the output is measured with an ac voltmeter from center-tap ground the remaining two terminals will measure 60v and be out of phase to equal 120v. That is balanced power.
If the secondary of an isolation transformer only has two terminals it will simply measure 120v and not provide the common mode (noise) rejection of a balanced power output.
I hope this sheds some light on the mysteries of balanced power output.