For OPAG I am using an OPA132PA , for OPALR I am using an OPA2132PA chip. [edit: At least, I think it is an OPA132PA for OPAG.. the chip is a bit weird. It says OPA132P A , with white text for the "OPA132P" and the "A" kind of faded and in a different font. I bought these off ebay since...

I am using a BUF364P chip for the L&R and the ground buffers. Is this fine? MisterX: Oh, I thought that the right channel problem was occurring due to the problem with the ground buffer. I'll take a look at the right circuit when I get a chance tonight. [Edit: although I'm not sure what to...

Thanks for pointing to Tangent's troubleshooting tips. I had forgotten about that page. For starters, I have a little more info about the problem. First - There is a very loud audible click when the pimeta starts up in the -right ear only- . The left ear works perfectly. According to the...

I have been staring at my board for a long time, but I have no idea what is the problem, or what could be the problem. I've assembled my whole pimeta according to tangent's guide, but there are two problems that occur: 1) the ground buffer BUFG heats up when there is an input signal. It...

Since I've successfully completed my CMOY project, I've decided to take the next logical step and try out a Pimeta, once again using Tangent's guide to walk me through it. I've already ordered all my parts, but there's one thing that's been bugging me. I wasn't able to find the exact TI...

Hey everyone, So I just finished my CMOY (very first DIY project) this weekend, and I took a bunch of pictures while I was making it and posted it up along with some descriptions on my blog for my friends to read. I thought I'd share it with you guys since you're all such a great help. I...

Haha. right. Basic current laws.. Can't believe it slipped me =] Another question - When I turn off my amp, it cuts off the signal from the source to the headphones. Is there a mod I can make to the wiring to make a simple bypass through the amp when it is turned off?

In Tangent's tutorial on how to make a CMOY, the pictures that he shows in the "Assembling the Amplifier" page show him connecting the RLED to the negative lead of the resistor. He also states that you should connect the RLED in this way. However, in the layout pdf, it shows the RLED connected...

Oh!! I just got home from work, hooked up all the clips again... And it works! Not only that, but it sounds really nice from the cheapo headphones I used n___n happy happy. Anyways, I'm wondering -- If I didn't hook up all of the wires correctly, ie. say I was missing R.out . Would that...

Hi everyone, I've been lurking on Head-fi for a few years off and on. You guys actually helped me choose my first set of audiophile headphones (HD595s. Loving them ) I've been recently thinking about doing some DIY projects, and last week I ordered parts for a CMOY based on Tangent's guide...