A strange, half crushed (but dont worry) package arrived for me today from The Netherlands. Strange, I didnt order anything from there, and to my knowledge, never have. I opened it up, and what do I find inside but a pair of Jecklin Float Model Two headphones! I almost missed the note in the...

I wont have time to get this in one of my DACs for at least a week, and probably more like two, but I thought I would share this with you guys now. I just received a small box in the mail from PCBNet today, with the following inside. They are prototype PCBs for the discrete I/V...

I have been playing around with some regulator circuits in LTSpice, trying to come up with something I like for use with a DAC I am working on. The regulators shown are what I am currently intending to use to power the discrete I/V and output buffer stage. I have also made versions for the 3.3v...

Just thought I would post a quick pic of the reason I am still up tonight. Just having real trouble turning Opeth's Deliverance CD off. Had a bit of trouble with way too much gain and getting the volume knob too high with my KSC75's earlier tonight, and even with my HD580s, I cant even make it a...

A while ago, a friend challenged me to design a PCB for a high quality headphone amp that fits in a mint tin. I personally dont care for the use of mint tins as amp cases, but I thought it would be fun to see if I could do it, and as I had a board designed that was similar in size, felt that it...

I thought I would post my schematic for a discrete I/V converter for use on the output of an audio DAC here, to see if anyone had any comments or suggestions as to how I could improve it. This is a discrete open loop DC coupled folded cascode common base amplifier, which steers the current...

I really enjoy my Shure E4 IEMs, and use them for extended periods of time (6 hours so far today, and 3 more to go until my next class). The only problem I have is with the tips, which wear out. The absolute favorite of mine so far were these kind of tapered orange foamies, completely different...

I got bored about a week or so ago, so started working on this layout. Its a Millett Hybrid, with built in diamond buffers, but added a position so a resistor could be put in series with the gate of a mosfet, so that could be used for the output transistor instead of a BJT. Also have a muting...

When I missed the 1st round of Alien DAC boards, I decided to do my own board layout to best suit what I wanted. The following is what I came up with. It measures 50x26mm, and for the most part, I just copied the schematic used by the Alien DAC, dropping the BUF634 section, as I only plan to...

Been working on this board for a while, and just got it to the point where I am happy with the layout. This is a continuation of my other project, but different enough that I felt it warrented a new thread. It is now 3 identical channels (except for gain of course), all using a single...

Been working on this layout for a while now, its already the second day . Features are:DIP8 opamps for L/R SOIC opamp for ground, either use a high current single opamp, or a low current opamp with an emitter-follower in its feedback loop Bypassing on all opamps via 0805 ceramics right at the...

I am looking at different methods for the virtual ground for a portable amp I am working on. I was thinking maybe a dual opamp, something simple like the AD8620 or OPA2132u, with an arrangement similar to that of the pint, half of it buffering a resistive divider for the small currents, and...

Nothing interesting on AIM or IRC tonight, and I finished the book I was reading, so I figured why not do another random amp board layout? Anyways, here it is, a slight modification of a common design seen around here, but larger, at ~66mm x 90mm. Feel free to comment, or make suggestions. I may...

I kinda caught the discrete buffer bug I think, and would like to experiment with some, but as I am very new to this, I would really appreciate some commentary on the schematics/layouts. All are made to be drop in compatible with the BUF634P pinouts, mainly for use in amps like the Pimeta. Two...

I am looking for a source for this heatsink, or something compatible with it. All of the usual suspects, Mouser, Digikey dont have it in stock, and have minimum orders in the range of 1000. I only need 12, so this doesnt work for me. Does anyone know of a source for them, or something else that...

I am looking to buy a new headunit for my father as a Christmas present, as his current one sounds terrible, and is basically useless for radio now, the tuner section is shot. The most I can afford to spend on it is $150, and I think I can manage the install myself. Speakers will be stock, or...

I recently ordered 10 of these $2 audio taper pot assortments from The Electronics Goldmine, and the order came in over the weekend. Each assortment has 8 pots, most of them pretty cheap, but there were a couple in each that look decent, some screwdriver adjust Alps RK09 dual unswitched pots...

I am going to be needing a number of AAA NiMH batteries soon for my portable amps, and was wondering what the best ones are. I have seen the 1000mAH Accupower for about $2.75 each in the quantity I need. It is expensive, but if it is the best, I will get myself a bunch of them. My amp will take...

I am going to be recording a decent amount of vinyl discs onto my computer to burn to cd, mainly for use in the car, but they will get other playtime too. Many of these discs are quite esoteric, not stuff that one can find anymore, baroque, rennissance (who's heard a crumhorn before?), and that...

I got this rather larger spool of 500' of 26awg teflon coated (white) stranded wire off ebay a while back, and just assumed that since I got it for $5, that it was probably SPC. Well, a couple weeks ago, I took a look again, and couldnt see the copper at the ends of the wires where it had been...

Happy birthday, wish you a good one. Of course, I forgot until you reminded me just now.

Well, my friend Eric (cire), and I both love the Mint design, but there are a few things that we have been wanting to be slightly different, a more compact board done in almost all SMD, one that would fit perfectly across the front of the smallest hammond, and leave room for one to stuff 8xAAA...

My pimeta has been working great for a while, but if I leave it on for a couple days, the sound all of a sudden becomes very distorted. Turning the amp off and on fixes this problem, but I am cureous as to what could be causing it. Power is a 24v linear regulated Elpac wallwart, WM080, so it...

Well, the group buy for Sennheiser connectors has been over for a while now, so I would like to see what you all have done with your connectors. Also, please post the specs of the cable. There are some real master here, and I imaging there have been some amazing creations, so post away. I will...

My father had this pcdp laying around on a shelf for several months/years, and when I found it, I had to try it. It is much better than the other pcdps I have, Rio Volt SP-90 running latest SP-100 firmware, and a Sony D-151, but I would like to hear what other people have to say about it.