greenmanhumming
Well-known member
I'd like to come up with a circuit for a multipattern LDC.
criteria:
* engaging natural detailed sound
* simple circuit with modest parts count
* flat frequency response, with possibility of adding some treble de-emphasis if needed.
so first question is what circuit topology?
options in my current order of preference:
1. fet with concertina balancing outputs, followed by a pair of transistors for current drive. I like the look of this topology as its balanced from the outset, but I have never seen it used in a proper condenser mic, only in electrets, does it have some terrible flaw?
2. fet source follower, followed if necessary by a transistor for lower output Z (like oktava MK-012)
3. fet voltage amp followed by transformer (like U87 or KM84)
can anyone offer arguments for and against each of these?
criteria:
* engaging natural detailed sound
* simple circuit with modest parts count
* flat frequency response, with possibility of adding some treble de-emphasis if needed.
so first question is what circuit topology?
options in my current order of preference:
1. fet with concertina balancing outputs, followed by a pair of transistors for current drive. I like the look of this topology as its balanced from the outset, but I have never seen it used in a proper condenser mic, only in electrets, does it have some terrible flaw?
2. fet source follower, followed if necessary by a transistor for lower output Z (like oktava MK-012)
3. fet voltage amp followed by transformer (like U87 or KM84)
can anyone offer arguments for and against each of these?