Re: Type 2 PHSNA Transformer T1 replacement

Nick Kennedy
 

In general, you wouldn't look at the transformer as a separate element having an impedance.  You'll be reasonably close considering it to be an ideal transformer with impedance transformation properties in accordance with its ratio.

If that's not accurate enough, you'd factor in its magnetizing impedance, which is generally reactive and in shunt.  If it's 10 times the connected impedance, the effect is minimal but you could figure it in if you are looking for high accuracy, or pushing the transformer to the limits of its frequency response, on either the high or low end.

Of course, you can make it even more complicated, depending  on how far you wish to go.

73-

Nick, WA5BDU

On Tue, Feb 2, 2016 at 8:47 PM, mendiola_loyola@... [PHSNA] <PHSNA@...> wrote:
 

What is the output impedance seen by a low pass filter a the output of your transformer connected to your 50 ohms load?

DDS + TRANSFORMER + 50 ohm load = 50 ohm of output impedance?

I think that the transformer impedance (50 ohm) in parallel with the 50 ohm load equals to 25 ohm.

Regards
Alfredo


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