BkraM
Member
Hi all,
I want to experiment with a ne602 mixer, but a bit confused on the required impedance matching.
In the stup i have, the input to pins 1 and 2 comes from a source with a 50 ohm resistance, the resistance between pins 1 and 2 is 3 kohm.
I'm reading that to match the impedance the turns ratio of a transformer is the key.
\sqrt{3000/50} or 7.75:1 should give a good impedance match between the source and the load.
The question is, how important are the number of turns itself. I could use a transformer with 7.75:1 windings or 387:50 or 775:100, which one would be preferred?
My initial thought is that it would be important to achieve some voltage level at the input pins, and therefore require enough inductance (depending on frequency) to achieve this.
But looking though the internet, all I read about is the importance of the ratio. Am i missing something and are all of the above choices leading to the same result?
Thanks,
I want to experiment with a ne602 mixer, but a bit confused on the required impedance matching.
In the stup i have, the input to pins 1 and 2 comes from a source with a 50 ohm resistance, the resistance between pins 1 and 2 is 3 kohm.
I'm reading that to match the impedance the turns ratio of a transformer is the key.
\sqrt{3000/50} or 7.75:1 should give a good impedance match between the source and the load.
The question is, how important are the number of turns itself. I could use a transformer with 7.75:1 windings or 387:50 or 775:100, which one would be preferred?
My initial thought is that it would be important to achieve some voltage level at the input pins, and therefore require enough inductance (depending on frequency) to achieve this.
But looking though the internet, all I read about is the importance of the ratio. Am i missing something and are all of the above choices leading to the same result?
Thanks,