Hi all,
Can I use in Aleph P current sources with
bipolar transistors (i have a lot of them)?
Will this change the sound performance?
😕
Can I use in Aleph P current sources with
bipolar transistors (i have a lot of them)?
Will this change the sound performance?
😕
Hi Stefan,
yes you can. Wouldn´t know why not. As for sound differences it´s not so difficult to try both isn´t it.
I assume you´ll have to buy more fets than you need anyway😉
william
yes you can. Wouldn´t know why not. As for sound differences it´s not so difficult to try both isn´t it.
I assume you´ll have to buy more fets than you need anyway😉
william
Your input source is going to see some DC, so you might
consider caps for that. Also, some nice caps across the
Zeners will take out some noise. Maybe a few hundred
ohms in series with the transistor bases to keep them
from loading down the reference when they saturate.
consider caps for that. Also, some nice caps across the
Zeners will take out some noise. Maybe a few hundred
ohms in series with the transistor bases to keep them
from loading down the reference when they saturate.
How would it affects the circuit if feedback resistors R11 and R14 would be removed? I mean, is there a way to get rid off the input coupling caps?😉
I think that it's too dificult to make in this circuit.
In all cases input capacitors are simplest and safest way.
In all cases input capacitors are simplest and safest way.
Peter Daniel said:How would it affects the circuit if feedback resistors R11 and R14 would be removed? I mean, is there a way to get rid off the input coupling caps?😉
I would try connecting R11 *after* C2, and R14 *after* C3. That would give you AC feedback only, but I would expect the circuit to auto-equillibrate with the input gates drifting to ground. Mr. Pass?
Jan Didden
The Gates have to be held at a positive potential or
the gain Mosfets will shut down, so some kind of DC
bias for them is required, or use a negative supply
rail instead of ground for your negative current
sources.
the gain Mosfets will shut down, so some kind of DC
bias for them is required, or use a negative supply
rail instead of ground for your negative current
sources.
Peter,
if you want 0 v at gates you have to provide
about -4 V at drains.
I think that this circuit cannot guarantee this in all conditions.
You must supply some negative feedback to hold gates at 0 V and this will make the circuit complicated.
if you want 0 v at gates you have to provide
about -4 V at drains.
I think that this circuit cannot guarantee this in all conditions.
You must supply some negative feedback to hold gates at 0 V and this will make the circuit complicated.
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