Very good, HF Guy!
that little k is Boltzmann's constant = 1.38 x 10to the power -23 juoles/deg kelvin. Not something I have instant recall of always.
I always remember it as 4nV/ sqrt Hz for a 1K resistor and proportional to sqrt R for scaling.
It helps being a physicist.
that little k is Boltzmann's constant = 1.38 x 10to the power -23 juoles/deg kelvin. Not something I have instant recall of always.
I always remember it as 4nV/ sqrt Hz for a 1K resistor and proportional to sqrt R for scaling.
It helps being a physicist.
volume controler... what for?
could you change volume level in the concert hall?
I'm not think so.
I never do any volume control in my amplifier. I've set it up during instalation.
I have not problem about different room reaction by different sound precure
and I have clean fron panel as well
http://www.artmaydan.org.ua/hi-end/amp_s.jpg
http://www.artmaydan.org.ua/amp.html
could you change volume level in the concert hall?
I'm not think so.
I never do any volume control in my amplifier. I've set it up during instalation.
I have not problem about different room reaction by different sound precure
and I have clean fron panel as well
http://www.artmaydan.org.ua/hi-end/amp_s.jpg
http://www.artmaydan.org.ua/amp.html
Is it just me or does it look far too complicated for what it needs to do? It's not too diufficult to make an attenuator that has 2^N steps (N being the number of relay contacts), and has any dB per step value you want, using 2*N + 1 resistors, that also has constant output and input resistance regardless of the setting, and can be driven by a binary combination to address the attenuation needed, dirtectly?
OK, let's revive this post...
Can someone (ilimzn perhaps) please guide me to a circuit for this " 2^N steps (N being the number of relay contacts), and has any dB per step value you want, using 2*N + 1 resistors, that also has constant output and input resistance regardless of the setting, and can be driven by a binary combination " type of volume control / attenuator.
I would appreciate the circuit for the control system as well as the attenuator.
Many thanks.
ilimzn said:Is it just me or does it look far too complicated for what it needs to do? It's not too diufficult to make an attenuator that has 2^N steps (N being the number of relay contacts), and has any dB per step value you want, using 2*N + 1 resistors, that also has constant output and input resistance regardless of the setting, and can be driven by a binary combination to address the attenuation needed, dirtectly?
Can someone (ilimzn perhaps) please guide me to a circuit for this " 2^N steps (N being the number of relay contacts), and has any dB per step value you want, using 2*N + 1 resistors, that also has constant output and input resistance regardless of the setting, and can be driven by a binary combination " type of volume control / attenuator.
I would appreciate the circuit for the control system as well as the attenuator.
Many thanks.
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