[Rimbaud]

I'm trying to understand how the volume control works on these models.  James stated in an older thread that they employ a resistor ladder controlled by software.  With software control I wouldn't think that a motorized dial would be required, although that could be a design decision among options (ie, fits with the Bryston approach).

What type of rotary electronic component is the knob attached to?

[James Tanner]

I'm trying to understand how the volume control works on these models.  James stated in an older thread that they employ a resistor ladder controlled by software.  With software control I wouldn't think that a motorized dial would be required, although that could be a design decision among options (ie, fits with the Bryston approach).

What type of rotary electronic component is the knob attached to?

I will ask the engineer.

james

[Rimbaud]

So what's the scoop, James?

[budcook]

I believe this is the volume control not the balance control from the B135.  The balance control on my BP-17 acted like it was controlled electronically.



See the B135 schematic on the Bryston website.

Bud

[Rimbaud]

budcook - so is your feeling that the volume control is just a motorized potentiometer?

[budcook]

budcook - so is your feeling that the volume control is just a motorized potentiometer?

Based on the schematic, it would seem to be.  I don't see that it matters so long as there is no negative effects on performance.  I certainly found nothing to complain about with my BP-17.  I only changed to the BP-26 because of the balanced inputs.

Bud

[Rimbaud]

At this point I have a sneaking feeling that it's a potentiometer (single-gang) > ADC (detects position of pot, doesn't convert signal) > resistor ladder (2 channel). 

[James Tanner]

At this point I have a sneaking feeling that it's a potentiometer (single-gang) > ADC (detects position of pot, doesn't convert signal) > resistor ladder (2 channel).

Hi Guys

I will rattle the engineering cage again

james

[R. Daneel]

Bryston uses very nice quality volume controls. For now the BHA-1 has been my only experience but the volume control is very well implemented, very precise and smooth.