Right now it looks like Twisted Pear Audio is out of stock of the joshua tree attenuator, does anything have any other way to obtain that attenuator? Or, is there another alternative to a digital controlled, relay based attenuator around? Thanks, Peter

Hey guys, I am look to buy some medium size (16inx16in) alumimum sheets, about 1/4in thick, may be a little less. I would perfer it to be anodized, but it will be ok if its not polished. Does anyone know a good and reliable source for that? Also, I am looking for some Lexan or Plexiglas...

Hey Guys, My MH has been finished and working for a little while, with bias set to 13.5V powered by a STEPS at 27V. Last night I was suddenly wanted to add the LED under the tubes and take out the LED on board. Following the image from DIYforum here, I populated the LED under the tube and...

Hey guys, I have built several amplifiers (CMOY, MH, PIMETA, etc) now, and I found out I have some general questions that seems to conflict with what I have learnt from class. So here I am, seeking for some help. 1) Most sources has fairly low output impedance (0.1ohm~10ohm), and when we use...

Hey guys, Does anyone have the PSPICE model for the tubes used for MH, i.e, 12AE6, 12FM6 and 12FK6? I am working on a project, and I would need to simulate the circuit of MH. Thanks, Peter

Hey guys, I finished my STEPS board for a little while now, and I have just case it up. I am using a standard Hammond alumimum case. As per tangent suggests in his article, I grounded the case, with a wire running from the ground of the IEC inlet ground to its bolt. I did sand off the...

Hey guys, I just got myself some FASTON insulated crimp lug from mouser. But I am not exactly sure how to use them though. I can't seem to take the metal parts inside the pastic housing out, so whenever I stick a wire inside the plastic hole, it would just fall back out. Is there a trick to...

Hey All!! I've been using my friend's cordless drill for a while, but now he needs it back. So it is time for a serious consider of a good drill for the frequent DIY jobs. I am not very familiar with drill spec's, so I need some good recommandation. I want a cordless drill, at least 9.6V...

Hey, I am at the stage of making amps and a crossfeed filter from tangent. I got kind of confused with some of the wirings. So I am here to seek for helps. 1) How do I hook up a DPDT toggle switch as a source selector? I got a on-on type and it got 6pins, how should I hook it up? I get...

Hey guys, I have been using my laptop, a portable CDP and Ipod as my sources. Considering the growth of my CDs collection, I decided to add a dedicated CDP into my rig. Budget is under $400, because it will be a start for me to see the improvement I can get through a CDP. Any brands are...

Since most people are getting the PCBs in the comming week, I will just start this off. Does anymore have a complete BOM for USB power option, regardless from Digikey or Mouser? Also, for CL and CR, I assume film caps are the choice there rit? Thanks for Alf, for all this effort...

Hi, I am bulding a STEPS now. The schematic doesn't say where the switch should be. I looked through photo of different STEPS built by others, and I notice that some put it after the AC comes in, and some place it before the output. Where would be a better choice? (I am building it in a separate...

One of my friend is having a trip to Hong Kong, and he will be back in around a month. He might be able to get me an amp from China/HK. For now, most of my equipments are DIY, so I never really looked into an amp before. What are some good chinese amp? Price range is to be ~200-300USD. P.S...

Hi there, my friend's bday is comming up in around 2 months, and we, as good buddies, decided to make him a good MAXED out Millet Hybrid, in order to hurt his future wallet futher. He does own some headphones, including HD600, but was never fond of the idea of amps. The reason MH was chosen is...

I am in the quest in looking for a new DMM. I am still in school, going for a electrical engineer degree, so I guess a good meter will last me for a life. I probably wouldn't just use it for DIY audio, also on anything that will come up in the future jobs/project. Measurements should including...

I just finished my rolls ratshack hookup wires and 63/37 solder. So I am wondering if I can try something better. Might not be able to hear the difference, but still wanna try something new. What's your recommandation for some semi-audio grade hookup wires and solder at reasonable prices? Teflon...

I just finished my rolls ratshack hookup wires and 63/37 solder. So I am wondering if I can try something better. Might not be able to hear the difference, but still wanna try something new. What's your recommandation for some semi-audio grade hookup wires and solder at reasonable prices? Teflon...

My laptop's headphone jack just got a pin snapped off, not that I can't solder a new jack in, but it just a good reason to upgrade from onboard sound chip . At newegg, SB notebook has a deal for $89.99 with $20 rebate, where everywhere else except eBay sells Indigo IO for $150. Is the...

Hey guys, I am ready to shed the blood of my wallet!!! Alright, I have been looking at an upgrade of my current rig. I currently have a pair of e3c, HD497, a ancient Sony PCDP, a CMOY and PIMETA (both DIY). I do notice that not that many people concentrate at Pop in here, but that is the...

Hey guys, Has anyone done rewiring the HD 497 before? I got myself some Starquad for interconnect, so I was wondering if I can make a better wire than the stock thin and easy-to-break one. Also wanna add a 1/4" plug instead for convinence. How does it sound? I have always been wondering too...

I have just built a PIMETA (yet to be in a case), and I started wondering how the quality of Monster Cables are. I saw a Mini to RCA monster cable is selling for 18 bucks, do u guys think its worth it? I know that many would say making my own cable would be more cost efficient, and I will...

Hey Guys, I am still kind of a beginner for audio DIY, so please forgive the following questions that may seem dumb. I have made several CMoy and I feel like this is the time to work on something harder (well, for me more elements means more stuff to worry ), so I choose PIMETA, and here are...

Hey guys, I was reading tangentsoft on CMOY and he layout the board with jumpers. What is jumper? What is the use of it? And is it necessary for amps? Thank youi

I am planning to build a small little cmoy amp. And i came up with 2 different op-amp that i want to use. The OPA2134 and 2227, which one would be a good choice for iPod and e3c and super.fi 5 pro that i use? Also, would having two separate chip (but same model) for each channel be a good...