Looking at the 15 hour charge time spec, I wouldn't be surprised.

May be your charger has the data pins shorted? This is done to indicate it's a charger only and thus allow the USB to charge at a higher current. May be the PHA-3 doesn't support that?

I am not disputing the factor that noise is less audible once you crank the volume up. But "noise floor" remain constant regardless of what you do with the signal volume. It is the baseline noise that isn't  affect by the signal. The SNR that manufacturers claim is always at the maximum volume...

I don't think the term noise floor is used correctly in this scenario. Noise floor implies that it is the device noise that is constant regardless of signal level.   In the Windows envrioment, let's say the noise has a value of 1 and signal at 10% volume has a value of 1, the SNR is then 1...

If I am not mistaken, all you are doing with the volume adapter is changing the volume. If you don't play any music and nothing but noise is coming from source, of course the noise is going to be louder as you increase the volume. The fact that the noise floor is still there doesn't change. The...

  You can't. Unless the noise is coming from the amp circuitry and LO allows you to bypass that circuit. In that case, you can use an external amp with lower noise floor. Other than that, there's not much you can do.   I think this is a misconception, that somehow the noise floor is lower...

From the description this is a 75ohm cable, and is not the kind of impedance matching you are thinking about. Impedance matching in the RF sense is to have same input/output impedance to maximize power transfer, which is clearly not needed here. Unless you are find a transformer to increase the...

Thanks. I agree that the square wave can demonstrate the distortion of the tone, but the round edges and overshoots only speaks to the high frequency response, namely bandwidth and Q of the drivers. IMHO, I don't see the connection to bass performance from a square wave response.

May be a basic question, but what does square wave response have to do with bass?

If I get the MDR-Z7 on time, I will be there!

Sorry to hear about the experience, but much larger distributors, such as mouser and digi-key all do the same. It's very difficult for them to estimate the cost of shipping of thousands of electronic parts. Image the shipping difference between one resistor, two resistor or 10,000 of them....

Quote: Originally Posted by BrianDonegan We don't currently have plans for an unassembled Buffalo. There are issues with the chip's moisture sensitivity. I also don't feel comfortable mounting just the chip and not being able to test it ($45 each chip). There is no programming...

Russ, Couple questions, here it comes. You mentions previously that the buffalo kit can come unassembled. Do you have a estimate date of availability on it? How about the price. Reading the manual, I am slightly confused about I2S input. Is it true that I have to rewrite the firmware...

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

Very nice chassis Pars, too bad I already had my heatsinks, but that could be for a full blow Aleph-X. Any more thoughts? Would a 5mm thick Al sheet be about to hold up 25lbs of load? Thanks, Peter

Thanks guys for the inputs. I am pretty noob when it comes to metal working. Well I am actually building a Aleph 30 speaker amp. I got the heatsinks as sides of the case. My transformer is about 20 lbs, and with all the other stuff on the base, I would say it has to take a 25 lbs load, with...

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...

Thanks guys. That cleared alot of things up. Here's one more question though: Looking at the bias trimpot on the schematic, it's just a resistor raised from ground. How does that affect the bias voltage at the grid? It should really be something that I would understand, but the tube symbol...

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...

Quote: Originally Posted by zanash My aim was to save a few years of trial and error...... Just because I have only 8 post doesn't make what I say of any less value than someone with 8000 posts. I have 2000 + post on another forum ..... zerogain.com I just spotted the requset...

Just curious, what is the proper treatment of the braided shielding? I have always left it alone, and used the wires for ground. I have also seen practices that use the sheilding as ground. What are the pros and cons? Peter

Court me in too!

Quote: Originally Posted by mb3k Ebay it from a respected seller. It will turn out to be much cheaper seeing you're in Canada. Second that. I got mine from EBay for $250, just as new. Got recent calibration and the plastic on the screen wasn't even off. My seller got ~100...

I think what he was trying to say is to optimize the gain, instead of the exact resistor value. Since your opamp has a GBP of 4.5MHz, the gain of 11 would give you less operating bandwidth than, let's say a gain of 5. For 8610, it isn't so much of a problem, since its GBP is much larger, using a...