Quote:   I wouldn't worry about suppliers; just find ones you can get in small quantities. Get TO-220(AB) ones so you can attach a heatsink. When you do make sure you get Mica bushing for heatsink mounting. Those tabs are electronically hot and you must insulate if you don't use it in the...

? http://diyaudioprojects.com/Solid/IRF610-Class-A-Headphone-Amp/ ?   You would probably want to fiddle with the gate voltage and look at the voltage across 20 ohms (R4). I am running 15V PSU doing 3.7~8V which is giving me 200mA per channel. I think that should give me Vgs = 3.7~8V...

Hey, Cheap micro irons have low power and they don't work. Lower power means low temperature recovery. Which means tip temperature drops hard as you solder. Makes bad weld because solder stop flowing while you are soldering. Going higher power solves this problem, but you gotta know your...

Any words on Lead-Free solder? I am very familiar with the problems associated with these. I attended a conference for this issue few years back. I understand the issue of iron tip corrosion and high-temperature flow were quite serious at the time. I understand high speed recovery iron...

Rock on, brother. One giant step for a DIY kind.

Do you happen to have a multimeter on you? It would be good if you know what's going on with the battery voltage. At least, it is the very first thing we generally do. "LED being dull" may indicate voltage failure, but you do hear normally on ONE channel right? Are you sure you are not...

Well 50 bucks? Did you know Grado RA-1 cost about 300-500 dollars? You are saving money like a demon, man. Get a multimeter. Without it, it is like trying to golf without any clubs. A multimeter is absolutely important to have and to know how to use. You don't need to be a master of it, but...

They all cost under 300 bucks or something. Not so expensive for recording equipment. ... Do you know a good microphone cost over one grand? ... Oh! So you all singers stop spit into the mike! Geez. Next time I see a singer does that when I am working on a set, I am going to beat that singer...

Quote: if the power circuit is off just a little will it run fine at low volumes? it runs for a long time at low volumes just fine(i dont know the limits) When you turn off your amp, your amp stops drawing electricity from your batteries. However, there is some power left in the...

You should use your multimeter and check the circuit again. The power supply rail should be +4.5V and -4.5V to ground. Often this gets screwed up for one thing or another. You should also check the headphone output to ground. This should be nearly Zero. I think you are getting clipping...

How about the original article? HeadWize - Project: A Pocket Headphone Amplifier by Chu Moy

I am pretty sure the vicinities of the train station will change. I will update that once they get done with construction. P.S. No. I won't do "maid-bar" guides. Thank you.

Sorry about the outdated info before. I usually hang out at Area V. I come from west with a bicycle and park near the chinese food / ramen parlor. You better park your bicycle elsewhere, because this place is mine. Kidding. Enjoy the Akihabara trip. T

Area VII: Looks like this from the across the street. It says Wakamatsu. First floor has computer stuff, but go up few floors via stairs or elevators. Check all floors.

Area VIII: Go across the street at the weird vending machine place and take the small street north. Looks like this, Turn right at the next crossing and you see the outdoor store. Turn left there, You will immediately see this. This is the Area VIII.