Hello sopapo,
this should work fine together. Regarding volume pot - please see the 1st image on this page:
http://web.telecom.cz/macura/dispre_en.html
The volume pot, preferably low impedance like 10k or 5k, is just at the input of the preamp circuit.
There was a number of people who have built a power follower, maybe if you perform search you may find some posts for example here:
http://www.diyaudio.com/forums/showthread.php?threadid=50051&highlight=
Have a fun with these circuits.
Best regards,
Pavel Macura
this should work fine together. Regarding volume pot - please see the 1st image on this page:
http://web.telecom.cz/macura/dispre_en.html
The volume pot, preferably low impedance like 10k or 5k, is just at the input of the preamp circuit.
There was a number of people who have built a power follower, maybe if you perform search you may find some posts for example here:
http://www.diyaudio.com/forums/showthread.php?threadid=50051&highlight=
Have a fun with these circuits.
Best regards,
Pavel Macura
Regarding Dispre - I have built and sold 15 units, as assembled PCBs. Here you can see the casework implementation of one of my customers:
http://audio.kvalitne.cz/dispre/dispre.htm
http://audio.kvalitne.cz/dispre/dispre.htm
Hi Pavel,
what I like in your design is the use of those 0,02 EUR Transistors.
I see that you don't use LEDs in the current sources (Q4/Q7) Does it sound better with R15/R18, are there additional reasons? Same question goes for the FC (Q3/R38/R42)
Did you try to use seperate Voltage reg's for the two stages (left and right from R44/C11)?
thanks in advance,
Rüdiger
what I like in your design is the use of those 0,02 EUR Transistors.
I see that you don't use LEDs in the current sources (Q4/Q7) Does it sound better with R15/R18, are there additional reasons? Same question goes for the FC (Q3/R38/R42)
Did you try to use seperate Voltage reg's for the two stages (left and right from R44/C11)?
thanks in advance,
Rüdiger
Hi Rüdiger,
in case of this preamp I decided to make it fast and very simple. There was no special intent how to design the current sources. For the reason of their solution and for the reason you mentioned, this preamp needs a decent, very low ripple power supply. C11 and C14 are pretty big, 1000uF. There is also an image with component values on the web page.
Regards,
Pavel
in case of this preamp I decided to make it fast and very simple. There was no special intent how to design the current sources. For the reason of their solution and for the reason you mentioned, this preamp needs a decent, very low ripple power supply. C11 and C14 are pretty big, 1000uF. There is also an image with component values on the web page.
Regards,
Pavel
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