[ARC5] Why an "UNUN?"

Kenneth G. Gordon kgordon2006 at frontier.com
Wed Oct 24 13:48:16 EDT 2012


On 24 Oct 2012 at 12:22, David Stinson wrote:

> What's an "UNUN" and why do we need one on
> the output of a Command Set transmitter?

David:

IMHO, your explanation is just fine. The principles are exactly the same whether at 60 Hz or 
100,000,000 Hz. The details are bit different, but for all practical purposes your explanation is 
plenty good enough.

To me, a transformer is a transformer is a transformer is a transformer. And that is all your 
UN-UN is: an AC transformer with one side of the primary and the secondary grounded and 
common.

If you ungrounded the grounded side of the secondary, you would have an UNBAL. (Hee 
hee!) :-)

vy 73,

Ken W7EKB


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