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.

Area V: Looking area near VI toward west. You should be careful. Turn not at a green store front ("Tsukumo"), but at a used electronics store. (and an abundoned Laox Computer) On this street, there are several interesting store in this area. I just have pictures of four stores I...

Area VI: (Or a store there) There is only one store in this location. The red store front. Sells some tools. I kind prefer this store over the tool store in Area I.

Area IV: This place has two audiophile stores and a junk parts store. This is the view from across a street. You get here by going further in from area III. And turning left at KFC I think the junk store is a place to visit if you are looking for something weird.

Area III: Go across the other side and you see a small street leading along the train rail over hang. Look for old blinking ticker Closer ... You see a small store selling tools. Beside the store, there are two corridors leading in. Go in and check out the place. This...

Area I: Going back to the yellow store front and go toward a big street, but do not cross. Look around and you see this, (Under the train rails) Or If you look around, you will observe there are small walkways among the stores leading inside. Walk in there, you will be seeing...

Area II : Observe the constructions in progress. Just look around and you probably see this. Now the yellow store front : This place has less than a half dozen DIY / Audio stores now. Use the escalator here, Go up to the fourth floor. Further to the back there is two...

Hey, I am sorry it took a long time. It took some time to get done with another project. I am taking this evening to assemble the picture I took today and write comments. So it will be ready tomorrow morning. This is a teaser picture. This is your starting point. Akihabara Station...

Hey, I found this. I can't confirm its authenticity as its parts are different. Topology looks right though.

Hey I found it. What Guzzlar said is right here! DIY Paradise - Sanyo OS-CON

I think it probably means it is designed to operate at lower voltage. Digital signal ... probably means on motherboards ... operate at low voltage well below 15 volts. Digital signals are designed to defeat noise but it does have vulnerabilities to noise. OSCON is trying to sell by marketing...