Here are the two Alps 50K "Blue Velvet" potentiometers I plan on using in my amp.  One will be used as the input volume control, and one will be for the bass boost control.

      I'm really excited about these because all my previous potentiometers have been Panasonic EVJs, so this will be a step up in tracking accuracy and hopefully sound quality as well.

 

     Here's a close-up picture of the Brown Dog 021001 Dual 8-DIP to 8-DIP adapter.  I'll be using it to mount (hopefully) dual OPA627 opamps.

Feedback resistors

So for the headphone amp, you should choose lower resistor values for the R3 & R4 feedback resistors. "First, high values will increase your circuit’s suspectibility to stray RF and electromagnetic noise. Second, higher resistor values are inherently nosier." 
However, lower values (<1K) will increase the wasted current to significant levels.  I guess this doesn't matter if running off wall power.

Well, I guess it was bound to happen.
I bricked my phone today trying to flash it between the 111.040.0704 firmware back to the 111.030.0609 firmware.
I was worried at first, but then I remembered that you can't simply downgrade the OS.  You have to reflash to the Scandinavian version first.
It's good now, but there goes 3 hours of my day off...

Phoenix 
Scandinavian FW 
 

I've created this blog as a place for me to place information for myself and others to reference to and hopefully find interesting.
Topics may include whatever I need to put down for school work, modding my Nokia N8, technology, and headphone/headphone amplifiers, biking, and maybe some politics.
If you stumble by here, please feel free to ask about anything.