If you go to the product page on Digi-Key's website you will find links to the footprint and circuit in the "Catalog Drawings" section. Between the two you should be able to figure out how to hook it up. And, yes, it is a dual pot.

I'm not entirely sure what you are asking, but I'll give it a shot. I believe what you are describing is a "thumbwheel potentiometer" that has a common ground connection. Digi-Key carries one from Panasonic and the schematic is shown in the parts listing. The one I found is Digi-Key part #...

Quote: I tried the link to Electronics Calculators, but it doesn't work for me. I am using Windows 7, tried it on Firefox and IE8 but the calculators wouldn't show up. (I have the latest Java update from Sun) I noticed the same problem and notified Tangent. He has corrected the...

Quote: Originally Posted by Ashkii21 Thanks! I am planning on making another Cmoy amp and was deciding on using either a 10k or 50k pot. I am using headphones with 32 ohms Impedance and was wondering if the 10k pot or 50k pot would work better with them or if it even matters. From what...

Use the value of R2. The pot determines the input impedance of the amp, but has no effect on the roll-off freq. The higher the value of R2, the lower the corner frequency, but at the cost of some noise. Tangent has a noise calculator on his site that's informative to play with...

The easiest way to determine if a wall wart is regulated is to check it with a meter. A regulated supply will output the rated voltage into any load up to the rated current. A non-regulated power supply will output a higher voltage at less than the rated current. Since a meter presents a very...

Quote: Originally Posted by rds Couldn't you "zero" a sound card by looping back the output with nothing in the signal path, then record these results and subtract them from measurements with something in the signal path? RightMark Audio Analyzer (RMAA) is an excellent (and free)...

I built a very similar PS to the one mentioned in the first post of the thread, an Elenco XP-620k (which no longer seems to be available). The only difference between it and the XP-720k is the lack of AC outputs which I didn't need anyway. I replaced the standard pots that came in the kit...