Super tone controls-I need PCB

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Tony44

Tony44

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Joined 2014
#1
Hello people!
Does anyone has made ​​this tone control under this schematic? 🙁
If it worked as it sounds? 😕
thank you!
 

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#4
VR3 on the left is a center-tapped potentiometer. It may be difficult to find one. If you use a normal one, then the loudness button won't work, but everything else will still work fine (volume, balance, bass, treble).

I would not build this circuit because there are simpler circuits that work better. In particular, I don't like the first stage with Q1 and Q2. It's not well designed. Rather look for a circuit with 2 opamps and no transistors.

BTW, i you search for "Baxandall tone controls", you should find lots of similar circuits.
 
#5
Good tone control schematic

godfrey said:
VR3 on the left is a center-tapped potentiometer. It may be difficult to find one. If you use a normal one, then the loudness button won't work, but everything else will still work fine (volume, balance, bass, treble).

I would not build this circuit because there are simpler circuits that work better. In particular, I don't like the first stage with Q1 and Q2. It's not well designed. Rather look for a circuit with 2 opamps and no transistors.

BTW, i you search for "Baxandall tone controls", you should find lots of similar circuits.
Click to expand...

Godfrey please give recommend a good schematic at your discretion.
thank you
 
Last edited:
#16
Just interested- why the volume control before tone circuit I personally would put it after as it helps keep the noise floor down at lower volume levels. You can always put a unity gain buffer after the volume if output impedance is an issue?
 
#18
blu_glo said:
Just interested- why the volume control before tone circuit I personally would put it after as it helps keep the noise floor down at lower volume levels. You can always put a unity gain buffer after the volume if output impedance is an issue?
Click to expand...
Yes, I was thinking output impedance would be too high, especially with a 50K pot, but you're right about the noise too. If the pot's not mounted on the PCB, then he can try wiring it up both ways and decide which he prefers.

Actually, there is another problem with putting the pot at the output: If the input is a high level signal and the tone controls are set to max boost, then the second opamp may clip the signal.
 
#19
godfrey said:
Yes, I was thinking output impedance would be too high, especially with a 50K pot, but you're right about the noise too. If the pot's not mounted on the PCB, then he can try wiring it up both ways and decide which he prefers.

Actually, there is another problem with putting the pot at the output: If the input is a high level signal and the tone controls are set to max boost, then the second opamp may clip the signal.
Click to expand...

At the entrance I want to use CD and DVD - player.🙂;😉
 
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