Quote: Originally Posted by polumenta Hello, I'm new to making heaphone amps and I wonder what use of volume pot when you can control your volume by your soundcard or iPod? It's just a handy volume control so you don't HAVE to adjust the soundcard/iPod. Quote: If there...

Why do you guys want little LEDs to light-up to sense the signal level? If you need a rough estimate, aren't your ears good enough? And, if you need something precise, why wouldn't you use a voltmeter? If you really want to do this, then drive the output signal to four comparators (eg: use a...

Quote: Originally Posted by aeriyn Well, that got me thinking about my idea of using toothpicks to clear blocked holes. Solder won't stick to wood, so... hmm. It works! This is exactly why I wouldn't use a toothpick for this task. I'd use a surface which solder will adhere, such...

Quote: Originally Posted by Garbz Hi all Can anybody help me out with values for a resistor and capacitor to put at the input of an amp? In a passive low-pass filter (RC), the -3dB point, wb (the point of half power), will be at (1/RC). If you want a -3dB point at, say, 2KHz...

Quote: Originally Posted by aeriyn But the bag says ESD on it. T.T The bag lies Quote: If I didn't drop it on the floor I'd probably be okay. >.>; Dropping it wasn't the problem. Touching it after it fell before grounding yourself was the problem. Quote...

Quote: Originally Posted by aeriyn Semiconductors are fairly static sensitive. That's why they tend to come in ESD bags. =P Anti-static bags. Quote: Just today I dropped an AD8610 opamp on the floor... it's carpeted. When I went to pick it up, I zapped it. You've...

Check out the following PDF for various Kobiconn 3.5mm jacks from Mouser (PC mount, surface mount, and panel mount): Link

Quote: Originally Posted by aeriyn first my rail splitter blew. now a pin broke off the opamp adapter and got stuck in the damn socket. this amp is trying to drive me insane, I think. Aren't females supposed to have a soft touch? Quote: the problem with the braid is...

Quote: Originally Posted by guzzler You can rearrange the sijosae buffer to make it vertical mount... Wouldn't be very mechanically-rigid at the joint if it were vertically-mounted, and that worries me. Quote: edit: meant to add, the sijosae buffer can be shrunk even...

Quote: Originally Posted by dokebi You could try etching your own. Try searching for jung buffer and diamond buffer. Too big Quote: Originally Posted by Dreamslacker How about the buffer used in the PPA? The HA3-5002. I believe Newark carries them and they're cheaper...

Hello, I am in need of a compact, low-cost alternative to the BUF634 for an output stage in a headphone amplifier. I have heard positive things about the EL2001, but I can't find a single distributor for the IC (has it been EOLed?). An output stage constructed from discrete components would...

Yup. You need quite a bit of current, and it's difficult to get the same current density throughout the entire part, and an uneven distribution means the colour will be uneven as well. I've seen a lot of anodizing work where there are blank spots on the metal because of electrical issues.

I'm not sure if I count 4 or 5 wires there (plus shielding fibres). Regardless, tie two cables together on one end and solder it to the ground connection on your mini jack. Then pick your wires for the left and right signals and solder to the mini jack. Eg: - tie white and black...

Quote: Originally Posted by tangent Yes. It's important for the output jack in a PIMETA or PPA to be isolated when you're using a metal case, because otherwise input and output grounds are shorted together, which causes problems. oic. Quote: Originally Posted by bg4533...

Quote: Originally Posted by bg4533 Are you looking for panel mount, pcb mount or inline jacks? Panel or PC mount. Anything but surface-mount, really. Quote: These are the jacks I used in my Pimeta: Link. The jack area is gold plated, but the terminals are not. It is...