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Hmm
I dont see the point of the opamp buffer.
The output stage looks funny.
Only 2 pair of MJW21193/4 at 75V?
I dont see the point of the opamp buffer.
The output stage looks funny.
Only 2 pair of MJW21193/4 at 75V?
Buffer is an optional
May be need another pair of paralleled final devices
if you need to use at maximum POWER🙂
May be need another pair of paralleled final devices
if you need to use at maximum POWER🙂
I agree , this looks outright deadly.
I would not hook my other 1500VA to it , spray the room with molten copper and kill the kids...
It looks like an Elektor design. It's a more or less conventional amp with a power stage without feedback. Is that good?
me recognised the elektor odor too.
Anyway, is there any hint, that those circuit is genuine and not 'improved' by dear Stee?
Regards
Anyway, is there any hint, that those circuit is genuine and not 'improved' by dear Stee?
Regards
Just checked the website esafono.it could be done by our halojoy. What is the message of the website?
Just ask him: http://www.esafono.it/NewSito/Contatti.htmlperanders said:
(er, never mind)
EDIT: and if this the same guy (it looks lile)... he has a patent application which looks "interesting" too, go pat2pdf.org, 20060093156
I looked at the circuit starting from the left, but only got as far as C1 before seeing that the circuit will not work. With no path for the input bias current for the op-amp, it will not give a valid output.
see the original one
http://www.esafono.it/pre50Vbis.pdf
Note: the sensitivity of the CFP is very high
my patent works very well with the speakers Ciare CW171
(with open magnetic circuit)
Important: the CFP Output Stage have the same drivers as final devices
to compense "hide Gain" and balance PNP-NPN hFE difference😕
http://www.esafono.it/pre50Vbis.pdf
Note: the sensitivity of the CFP is very high
my patent works very well with the speakers Ciare CW171
(with open magnetic circuit)
Important: the CFP Output Stage have the same drivers as final devices
to compense "hide Gain" and balance PNP-NPN hFE difference😕
?????????????
http://www.esafono.it/pre50Vbis.pdf
Very nice 1000 ohm resistor in series with output.......
http://www.esafono.it/pre50Vbis.pdf
Very nice 1000 ohm resistor in series with output.......
?????
http://www.esafono.it/pre50Vbis.pdf
You cant have a 47 ohm resistor in series with a poweramp output! The amp output must at least have 20 times lower impedance than the driven load.
What is this amp intended to drive?
http://www.esafono.it/pre50Vbis.pdf
You cant have a 47 ohm resistor in series with a poweramp output! The amp output must at least have 20 times lower impedance than the driven load.
What is this amp intended to drive?
sorry
don't understand
do you means 18 ohm in series to each driver?
remeber
CFP have gain G=1
also is able to found zero by it's self
don't need NFB
probabaly need a paralleling of 3pair of final for maximum power@8ohm
Motorola 21193/21194 transistors have a good SOA
don't understand
do you means 18 ohm in series to each driver?
remeber
CFP have gain G=1
also is able to found zero by it's self
don't need NFB
probabaly need a paralleling of 3pair of final for maximum power@8ohm
Motorola 21193/21194 transistors have a good SOA
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