noise in preamp

[vlljpior]

I just made this preamp and sometime i have some poping noise. What i can do...
the preamp can be view at: http://sound.westhost.com/project27.htm
Thanks

[Boofhead]

If you used electrolytics for C14 and C15 make sure the -ve leads of each are pointing to the transistor Q1.

Other than that, could be some sort of external noise in your area which is getting into the electronics  due to poor shielding.  Coax on the input socket, tone-controls, and VOLUME pot would be a good idea.