Adding gain & volume

[rangermaster]

Hi there. Maybe a noob question but i cant find anything about it that helps me out.

I would like to try this schematic



Is it possible to add a gain and a volume pot to this ? If so.. what should be good pot values and how/where to add them ?

Thanks !

[antonis]

It depends on whether you are satisfied of present configuration gain as maximum one..

If so, you can replace 680R Emitter resistor with with a 500R pot + 180R resistor and wire upper leg of 22μF cap on pot's wiper..

As for Volume control, a 100k pot on output should be fine..

P.S.
Schematic is coming asap..

[rangermaster]

Ok thanks ! I'll wait for your schematic!

[antonis]

Here you are.. 



P.S.
You can study Big Muff Π clipping stages 'cause it's just a modified one..
(470k feedback resistor in original design is splitted into 2 X 220k, one of them decoupled by 10nF cap for raising stage input impedance..)

[rangermaster]

Thanks man! That's quick

I'll try this tomorrow and see if i can understand these schematics!

Normally i use those vero layouts

[rangermaster]

I think you mean a 500K pot with a 180ohms resistor ?

[antonis]

I think you mean a 500K pot with a 180ohms resistor ?

Definately not..!!

500k for Emitter resistor should keep the transistor permanently topped..
500R (Ohms) in series with 180Ohms make 680Ohms as in original schematic..
It could be a single 680Ohms pot if only it could be commercially availiable..

[rangermaster]

Ah ok. Well i dont have any ohm pots here.. just K pots. 10, 250, 500 etc

I'm still a little confused about how to wire the resistors/caps to or from the pot in this schematic. Just a nother noob thing though 

[antonis]

You can use 250k pot instead of 100k one without any issue..
(considering next stage input impedance high enough..)

[rangermaster]

You can use 250k pot instead of 100k one without any issue..
(considering next stage input impedance high enough..)

thanks man !

[antonis]

Lets make it more clear..




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