Series: more voltage, same runtime. Parallel: more runtime, same voltage. all those 9V tricks will work, to more or less effect. end result: you still gotta carry the thing, and the battery pack. Stick to your TA.

Hmm, you'll have to do a bit more reverse engineering than that. It could be some are single amps, some are duals... they look the same unless you know. Might not even be related to the headphone circuit. The easiest way to know is to contact Onkyo for a service manual, which will have a...

SSOPs. Right at my limit. I can touch the individual pins with the 1mm tip and I only reflow the pins to either side when heating one, and I guess I could be successful. Double the density of SOICs? Ugh. And you like this? Woah. I never thought a one millimeter soldering iron tip would be huge...

That's great, as an inspection tool... not as a work tool. (probably makes stones look good too, whip out the loupe with a florish and check out the teach's wedding ring!) Like, it'd be GREAT for seeing all the pins bridged together tryin to solder MSOP8 with a 28 gauge wire wrapped around a...

No, not mono/stereo... but a switch. Those "horseshoes" are only a short with no plug inserted... Divie's right, you were floating the phones ungrounded, by wiring the ground wire to the side that got unswitched when the plug was inserted. Great troubleshooting. I've heard of a few people now...

While only marginally related (the link is in the gallery section of passdiy) THIS is what I wish I was cool like. THIS is what I would do if I had a garage or basement workshop. I hate speakers... I'm headphones 101% of the time for over a year... but this rig. DIY everything. Check this...

No, that's probably not it. If the 'lytics were hosed, then running the amp without em would make it work just fine. You don't need reserve caps when a BUF634 is your rail splitter! If removing them makes it louder, it's probably ground related... they're acting as a filter when in the...

Ok, so no one has a suggestion for you. Stop bumping it. Do you want portable or AC, glass or solid state? Do you want something that is paint-by-numbers or something where you have to think? Do you want to do math or want the math done for you? Do you want something you can complete in an...

Let the crossposting continue! I answered you at the other place, sorry.

Well, that's not entirely true. Sometimes a part is also made by someone else, later in life. But usually the entire part # will be the same, even if it's not their normal nomenclature. Like, many people make LM317-Ts, not just National. Philips uses TDA* for it's amp chips, but you can get...

Forrest Mims the I II III IV? Just Kidding! Why kidding? You know more than him? You have nothing to learn from those books? Hey he's a hero too... he's not a pioneer that I know of, but definately worthy... (just like that generation has a crapload more than just Walt and Bob, I just...

lego, I apologize... I've hihacked your thread. ------ I'm just venting... I don't want the cliffnote version, I actually want to strive for understanding. Do you remember when you finally got your head around the concept that frequency wasn't so much a value as a measure of time? It's...

Quote: if I understand your equations correctly, at 18 volts, a 1/8 watt resistor can handle 7 milliamps? ok, but - you are leaving out the resistance for us. 10 ohm @ 18V? 18/10=1.8*18=1800mA*18V=32,400 mW = Smoked. 10k @ 18V? 18/10,000=1.8mA*18=32.4 mW = Fine. And you...

Also don't forget that there's DVD portables now, even some FINALLY without screens... not intended to be portable audio devices but something that Jimmy can take from dorm to home to his buddy's house easily. We have to keep an eye on these, a great DVD-A portable might just come out, or even...

Budgie: Exactly!! They're just implementors. Most chip builders aren't pioneering, they're using the tools they have to a commercial endevour. They already have the circuit they're just learning how to make it smaller and automated and hopefully cast it on a die to imbed it in your cell phone...