Hey guys, long time no see.   There are plenty of PCB-mounted 3.5mm sockets out there that have switches in them that will open/close when a plug has been pushed in.   I was wondering, howeverm if anyone has seen one that can be soldered onto the end of a cable?   Thanks for reading...

Wow, I always seem to miss these things. But I am impressed with how large the Melbourne Head-Fi community has grown!   Rob.

Quote: Originally Posted by tomb Also, the only thing that will charge the caps is current to ground. Wait a second, if that is true, then what's the logic behind unplugging headphones for start up? The caps still won't be charged and will create a nasty spike when you plug the...

Quote: Originally Posted by tomb Also, the only thing that will charge the caps is current to ground. So, for your method to have a chance, you'd need to put the resistance between cap terminal and ground (note that any amp with output coupling caps already has resistors from the caps...

Quote: Originally Posted by S3TUP Wouldn't work. The pop comes from the amplifier itself no matter what is connected to it, when it turns on. And your pot would just disconnect the input of the amp, so you'll hear the pop as you always did. Try it with the volume set low and you'll...

So I was thinking about the problem of large output caps, and the stress they put on headphones during start up. What if, instead of a power switch, you used a potentiometer with a built in switch? Have the switch wired to power like normal, but wire up the pot between the output cap and...

Quote: Originally Posted by jcx I've built a TPA6120 Class A amp general disscussion of Class A output bias of chips, photo's of my amp and circuit ideas futher down in this thread: http://www.head-fi.org/forums/f6/ad8...8/#post2261919 I haven't been here for years, and...

Quote: Originally Posted by lewislink Unless the OP is going to store more than 32GB of music on the player, there shouldn't be an issue. I'm afraid he is. Rob.

And, from what I can gather, a 32gb SD card adds a considerable amount to the cost. Rob.

Thanks for the suggestions Ultimately though a lot of those players are just too big (I forgot to mention, I'd like it to be smaller sized) and/or have too low battery life. The main problem with the Zune is that it isn't actually available in Australia (or anywhere outside the US/Canada...

I'm in the market for a new MP3 player, and looking to stay away from Apple. I'm wanting at least 60gb (might settle for less, but I wouldn't count on it) and a battery life of at least 20hours. Problem is that most places seem to be producing smaller flash players, rather than HDD based...

Argh, I only just received gz76's PM about it. Wish the head-fi forums would have sent me an email about the PM. C'est la vie, hope you guys had a good time. Rob.

Hrm, what about building multiple stereo USB DACs and integrating a USB hub into your project? Does the software you are looking at using will allow to use different sound cards for different channels? Rob.

The later parts of this thread deal with a couple of different suggestions on how to use an alien dac without output caps: http://www.head-fi.org/forums/showthread.php?t=195341 Is was pretty much decided that it wasnt worth the time/money/effort for a DAC like the alien dac. Rob.

Looks interesting, do you have any more info on it? Rob.

Quote: Originally Posted by DaKi][er $50! Dam! $20 from Jaycar Yeah, was 1.5 Amp iirc though. Wish i woulda got it from jaycar now though... :P Rob.

DSE sells a 24v unregulated power supply for $50ish. Throw a LM317 infront of it and you are set. Rob.

Quote: Originally Posted by Kevin Gilmore Kevin's Rules of Proper Audio Design Capacitors in the audio signal path are BAD. Even the best silver-mica or poly caps exhibit non-linearities at low voltage levels. Capacitors belong in power supply sections and nowhere else. Capacitors used...

[edit]: Double post, sorry.

Quote: Originally Posted by amb Since the two mosfets are connected in series (they are cascoded), the current through all three points are identical. And what current would that be? As i see it they are two seperate CCSs that are trying to draw different currents, how would the...

Hey guys, I have a couple of questions about the following circuit: (Assuming a transconductance of 1) My questions are: 1) What would the current be before the first mosfet, in the middle of the two mosfets, and after the second mosfet? 2) What would the voltag be in between...

Quote: Originally Posted by Enverxis My Dynahi will be done this weekend as well; so that should be fun. Id really like to AB the Dynahi vs Dynalo, be curious to here the diff. Mind if i ask about the specs on your Dynahi? Rob.

Well, i finally got my Dynalo going, so sure After VCE exams would be a great thing though, and depending on a few variables i might be able to host it too. Rob.

Quote: Originally Posted by Seaside Dac is not made to drive earphone... yeah... that's right. But that does not neccessarily means that the sound of DAC automatically will be distorted at higher volume when you plug earphones into the dac. You make a good point. However, it does...

Quote: Originally Posted by mikemacwillie The problem is that you're not supposed to use it to directly drive headphones! As above, the DAC is not made to drive headphones. Rob.