Archive of the former Yahoo!Groups mailing list: MOTM

Well, I hate to open this can of worms (mixer) again, BUT, it always
generates some interesting and informative discussion. Has anyone else
checked out the Blacet site lately? I thought his mixer was certainly
thought provoking. Seems that each input has gain both directions
apparently with 180 degree phase reversal in one direction of the knob.
So, looks like the mixer kind of doubles as a inverting attenuator / maybe
with gain.

Anyway, I can see the advantage and handiness of having the inverter
(separate). However, I wonder how / why one might choose to invert the
phase of one of the signals being input to a mixer. The only thing that
comes to mind is the cancellation that could be achieved between the common
parts of two signals. Some of you guys enlighten me please.

And what is the scoop with the "bias" control? When I think of bias, I
think of setting the mid point of the range where the signal rides on the
input of an amplifier. Back in my old tube days, the correct bias would
assure that you were operating on the linear portion (or not, if that was
your choice) of the tube's characteristic (input voltage to output
current). Seems like, on solid state, biasing off a center desirable point
would just result in ugly distortion. What am I missing here?

Well, I am not promoting the Blacet product here on the MOTM list, but
since many MOTM modules are centered around the "best" of some other good
designs, it seems appropriate to bring up what is at least a new feature on
a mixer to me.

Larry Hendry