I have ordered the parts for both a mini3 and a jisbos from AMB today. I'll build the mini3 so I'm guaranteed to have a working portable amp I'll do some experiments with the jisbos to learn about the circuit and use that knowledge to try and design my own circuit and PCBs

Do you have a link to a forum post or webpage that cover a jisbos with gain?

thanks. I already checked them out and found the same thing. They have good prices, if you're looking exactly for what they sell

I think I have decided on what I want to do. I like the 2ch jisbos design, and I'd like to add an opamp for the gain. Not because I think it's better, but because I'd finally get to use the opa627/637 I have lying around I'll start a thread on headwize when I've studied the schematics and...

Well, I decided to go ahead: I've ordered the CK7's from audiocubes. I hope they arrive soon

Thanks. I was leaning towards the CK7s as well. I think I'll order them later today. I'm looking for a shop that will ship them to the Netherlands at a reasonable total price (phones+shipping).

Hi, I'm going to buy a set of IEMs. I've brought my options back to these three, based upon information I found on the forum: The JVC HA-FX300B The audiotechnica CK7 And the sony EX85SL They range from $60 to $100. I don't have an opportunity to listen to them in advance, so...

Thanks for all the tips, those discrete amps look very nice. I'll study them and I'll post here when I know what I want to do.

oww, that's fast Could you give me a link to these amps? I'm a bit rusty, here on head-fi (shame on me )

Hi everyone! I'm back again after having built AMB's cavalli kan amplifier last year I want to build another amplifier. This time I'm looking for a portable design. I'm not looking for an amplifier that I can use "on the move", but one that I can take with me to work and use there. It...

It's the CK2-III I really wanted to build something, I haven't done anything with DIY audio in a long, long time. But I didn't want to design it myself and I also wanted a discrete amp. I found AMB's pages on the web and the threads on head-fi and headwize. Easy choice I re-used some...

Quote: Originally posted by aixer Doh..! Duracell now owns Energizer, No more bunny. Over here, in europe duracell also advertises with a bunny (well they did, when they actually advertised. I haven't seen an ad in a long long time) So, there is hope for you yet

It will stay here untill I need the space for something else.

Did some resizing, and uploaded the image to headfi. For the full image: copy paste to your address bar. tripod does not allow direct linking to files from another page. So if copy/pasting doesnt work: do it two times (the second time you will come from a tripod site, so it will show up. Or...

Could be, this is a very standard layout, directly from an application note from burr brown (doubling the output current with the opa2604). The hansen does something similar. I build this amp on a piece of protoboard. I will open a new topic on headwize, probably this week with some images of...

Hi, I finished the amp in the schematic this afternoon. I listened to it for about half an hour and am _very_ impressed with the performance. Here's a copy-paste from an email, I sent 10 minutes ago, about this amp: Quote: I just drew the schematic of the amplifier section of the...

What is it?

Update: I did some measurements. And I've probably solved the problems. (still have do the final and most conclusive test: play music through it) There were two problems: 1. One busted mosfet (hate when that happens!) 2. I wired my powersupply the wrong way. Although the powersupply put...

Hi, just finished the update to the XO clock mod. I added an image of the PCB I made, maybe it's worth a look.

Quote: Originally posted by aos What is wrong with that power supply? I've also built the same one a few weeks ago but my crystal frequency was wrong so everything played in about 1/2 speed . I should get new crystal this week I hope. It looks like a standard linear regulator. By the...

Thanks for the quotes tip! I checked with internet explorer and with opera, but apparently, people still use Netscape :P The jitter reduction thingie works. This is the next project that I will update. But I've talked to someone with more electronics skillz than I have, and he claims that the...

I've put a more detailed write-up online at my webpage. Take a look, if you're interested: raymondaudio There is a direct link on the frontpage, or go to the "projects" page. I'd appreciate any feedback on this mod, or on the page I've written about it.

I can't hear any difference. I already couldn't between the stock and the belden cable (which BTW cost $30) and I also can't between this cable and the Belden. Guess I should get me some golden ears at my next order at the electronics store :P

I bought the Beyerdynamic DT931 with Jan Meiers great headwize offer. I was immediately impressed by it's sound quality and irritated by it's awful coiled cord. This cord will pull the cans right of your head when you move more that 1,5 metres from the source! So I exchanged a few emails with...

The powersupply, which works flawlessly, a nice +/-7,50V on the outputs: The Szekeres PCB: I removed the 2 diodes, for testing purposes, because this one DOESN't work!! It draws an incredible amount of current, heating up my 25VA transfomer within 20 seconds. Note: this is only...