Volume Control for Tiny Headphone Amp

[patrick.zimmon]

Hey Yall.

I'm building a little battery powered mono headphone amp based on the circuit design below and trying to get some sort of volume control.

As of right now I've found that a 10k pot in series with r8 to worrk fairly well except for some of the pot's rotation theres some loud static and distortion.

Any help appreciated Thanks!!

 

[Brian Roth]

Put a pot between J1 and C1?

Bri

 

[ccaudle]

Not a good idea to run DC current through a pot, or through your headphones.

 

[Brian Roth]

Not a good idea to run DC current through a pot, or through your headphones.

Excellent point that I had missed!! Output needs to have a coupling capacitor.

Bri

 

[MagnetoSound]

Hard to say much without the values, but it looks as though R8 should run straight to ground, and put an output cap from top of R8 to cans.

Performance is going to depend much on R8 value and headphone impedance.

As Brian says, put the volume pot at the input, before C1.