warpie
Well-known member
- Joined
- Feb 7, 2009
- Messages
- 1,566
Hi,
After some testing and experimentation I managed to get all the cutoff frequencies I need for the LP and HP.
However, I noticed a big increase in noise (about 15db) in the HP filter.
I'm pretty sure this is caused by the cable I run from (-) of C82 to a board where I have all the switchable caps (for different HP Fcs) and then back to the (+) of C82.
I tried to keep the cable as sort as possible but I still get an unusable SNR.
Are there any solutions to this problem?
(I believe it's a common topology and I've seen many units that have cables running from the caps to the switches.)
thanks
Mike
After some testing and experimentation I managed to get all the cutoff frequencies I need for the LP and HP.
However, I noticed a big increase in noise (about 15db) in the HP filter.
I'm pretty sure this is caused by the cable I run from (-) of C82 to a board where I have all the switchable caps (for different HP Fcs) and then back to the (+) of C82.
I tried to keep the cable as sort as possible but I still get an unusable SNR.
Are there any solutions to this problem?
(I believe it's a common topology and I've seen many units that have cables running from the caps to the switches.)
thanks
Mike