After a bit of research, and realizing that this was probably in the wrong category (sorry for this), I think I ll try the squeezebox touch

Ok, so, I'm not even sure that whole thing is possible, but I  was thinking.   Right now, whenever I want to listen to music on my speaker setup, I have to switch the computer on. Switch the external hard drive on. Plugin my sound card. Wait for windows to load. Etc, etc... And there are...

Since there s already an opened thread, I thought I'd post in here, since I'm also considering the idea of building a loudspeakers amp (I'm asking the question here,@ headfi because, I've found that the community was great, I've already built an alienDAC and a PPaV2 with the advices of the...

Thanks to all of you for your answers. Gonna buy eye/ears protection soon and will try taping the shaft

Hey guys, I ve got 2 little questions regarding casework. First : the one that boggles me more I have an rk27 and this volume knob : 45KN031 I ve tried attaching the knob to the pot using the small screw that is inside the knob, but the result doesnt feel too good. The knob simply...

Hopefully last update : I've biased the amp in class A, swapped opamps around a bit. Impressions : Full opa627 : good ad 825 : unimpressed opa627 on G, 637 on L/R : WOW!!! After trying the 627/637 combo, I was sold. Sound is detailed and has enough "punch" to satisfy me. I still...

I was using neutrik nys rca jacks for input, and hadnt taken the time to properly screw the ring that connected ground. It didn't made contact most of the time with the jack, so my input ground wasnt ok ^^ yup, I feel a bit ashamed ^^ I'm definitely going to try opamps other than the 627...

It's alive! I tried it with my Senn hd650, after double checking a few things and it delivers!!! now, to bias it into class A ; try different opamps ^^ and case it thanks a lot for your help guys, Tangent for all his advices, info and espressogeek for keeping me motivated ^^

I've worked a bit on my PPA today, to try fixing it, here's what I've done : 1/ I've realized I had forgotten to jumper S2R! doh! fixed it! 2/ I realized that last week, I had changed the output resistors (from 2.2R to 4.7R) but hadnt touched the output buffer trim pots. So voltage was a...

I ve measured the ouput, unloaded voltage of my AC adapter and get 26VAC. According to the ps parameter estimator, that means the reg will get pretty hot. I've raised the output voltage of the TREAD to 27V for future tests. If it still gets too hot, I'll consider changing the heatsink for a...

Quote: Originally Posted by tangent The only heat sink in the TREAD part list is Aavid part number 577202B00000G, which has a thermal resistance of 24.4. The estimator's default heat sink resistance is 4, which is the default for the STEPS. Your numbers appear to be using this latter...

Well, I had already used the power supply parameter estimator anyway, I'm using a TREAD kit, so the cap is 680uF the power supply is rated for 24VAC, with 35% reg, which brings us to 32.4V unloaded. Rated current is 0.5 I live in France, line frequency = 50Hz. I'm using a standard...

Mmmm I officially don't understand what's going on. First, I've added the heatsink to the TREAD, and I've changed the output resistors to 4.7r (from 2.2) then I've tried measuring the current flowing to the PPA. However my meter is ****ty : caliber is either 10A, or 200mA and lower...

The kit is 88.92 but it includes an adapter pack which you cant use since you live in France, so it will probably cost less, you can add 40 for the custom panels but it's not mandatory, and some more for the shipping Le kit est a 88.92 dollars mais comprend un adaptateur secteur que tu ne...

I can confirm that Jeff ships to France. I ordered an Alien DAC kit before from him and received it without any issue

Ok, I've tried to do some debugging tonight. It's limited since I can't use my soldering iron, but heres what I've found DC Offsets 3.5mv dc offset between OG and OL 18mv dc offset between OR and OG 1mV offset between OG and IG then I've set my meter to VAC and checked between OL and...

I m using a TREAD for PS. For the noise, I ve put the ground strap, but it doesn't change anything. And I dont need to touch the pot. In fact, wether I touch it or not, it doesn't change anything. There s just a lot of noise, that can be heard even though no source is connected. And the...

I'm too tired so I'll stop working on the PPA for today. Anyway, progress report since last weekend : ppa doesnt kill opamps anymore I have 40mV or so at each output resistor (so technically, I think each channel is working) on the todo list : fix the output : no source connected...

just a quick question: how exactly do you get the ground strap to stick to the alps pot? I ve tried solder, solder with flux, but nothing gets solder to stick to the damn vise of the pot...

I've replaced the output transistors of the left channel, found there was a bit of solder (causing a short) between two legs of one of them, could be what had caused me trouble anyway, I replaced those. Put my "official tester" (AD834) in the socket, switched the amp on and checked voltages...

Mmm, I'm getting confused. I've removed all the unnecessary input and output wiring, and have done some tests. Voltage at the power supply pins of the opamps is ok. I get 11.5 between V+and ground and the same between V- and ground when no opamp is in the socket. With an opamp, I get lower...

My stupidity : when I had soldered the input wires, the unbraided wires that I hadn't cut got pressed against each other Yeah, I know, epic fail ^^

oh and btw, there s something I hadnt mentioned earlier. When I plugged in the amp and Q24 got hot, I had a short between IG and IR. I suppose it could have done some damage?

Well, I m thinking it could also be the buffer transistors. Not sure of anything though. But the good thing is I have spares edit : I've also realized that apparently my meter sucks a bit too I use the default 2.2ohms resistors for output and I got something like 60mV and 7.5mA across...

Ok, I ve bought a hakko 937 clone, some 0.5mm solder, flux pen and soldering the ad8610 got a lot easier! I have 3 mounted on browndogs. I ve tried switching the PPA on. And well, Q24R gets real hot. And there s a bad smell floating in the air. I think something s burnt ^^ now, I m...