etheory
Well-known member
Hi there!
With regards to the Siemens Sitral W295b schematic from http://audio.kubarth.com/rundfunk/index.cgi, does anyone have measurements of the Inductors for Dr1 and Dr2?
Maybe from a real unit? Including inductance and DCR per tap?
Dr1 is a single fixed value inductor (which seems, from my circuit simulations, to control Q width) and Dr2 is what appears to be a multi-tapped inductor with 7 taps (one goes to ground and then there are 6 that are switched to choose the parametric presence band boost/cut) that helps, along with a resistor and capacitor, to set the presence centre frequencies.
If no-one has measured an actual unit, then can anyone tell me what configuration the presence band is (i.e. the technical name for the presence configuration so I have the right search words), since I'd love to look it up on Google and find a way to calculate the centre frequency manually and just reverse engineer it from the frequency markings on the schematic.
Just guessing with a values in the simulator via trial and error to get things to line up hasn't been going that well so far....
Thanks in advance!
With regards to the Siemens Sitral W295b schematic from http://audio.kubarth.com/rundfunk/index.cgi, does anyone have measurements of the Inductors for Dr1 and Dr2?
Maybe from a real unit? Including inductance and DCR per tap?
Dr1 is a single fixed value inductor (which seems, from my circuit simulations, to control Q width) and Dr2 is what appears to be a multi-tapped inductor with 7 taps (one goes to ground and then there are 6 that are switched to choose the parametric presence band boost/cut) that helps, along with a resistor and capacitor, to set the presence centre frequencies.
If no-one has measured an actual unit, then can anyone tell me what configuration the presence band is (i.e. the technical name for the presence configuration so I have the right search words), since I'd love to look it up on Google and find a way to calculate the centre frequency manually and just reverse engineer it from the frequency markings on the schematic.
Just guessing with a values in the simulator via trial and error to get things to line up hasn't been going that well so far....
Thanks in advance!