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Posts by wakibaki

Hey, Goobley...   It doesn't say on your profile where you live. You should stick it in, because it makes it easier to make recommendations about components if the responder has some idea of where you can source things e.g Europe or USA.   Have you seen these:- http://www.tube-town.net/ttstore/product_info.php/info/p3772_Supertex-LR8N3-Linear-Regulator-450-V.html   ...450V regulator/current source, only 10mA, but dissipates 0.75W, just like LM317 to...
What's the servo authority, i.e. what's the range of offsets for which it can correct? I don't think it's a good idea to tie the output to the negative rail in a DC application, but I'm prepared to be convinced. What's your thinking here?.   w 
A few more sims:   All these are fed from a low impedance source, the amplifier worst-case input impedance is ~25k. It drives 16 ohms with gain, not much gain, but it's a reasonable impedance transformation, and it's sensitivity is in the correct range for typical sources, 1- 2V for full output, depending on load impedance, and it'll drive 600 ohms to 9V peak. It's a bit better than a buffer, about what you might expect for a headphone amp to meet a present-day...
  This is the view held by Peter Aczel, editor of 'The Audio Critic'.   http://www.theaudiocritic.com/   If you haven't seen The Audio Critic, you might enjoy reading a few of the back issues.   My own view is that while there might be tiny perceptible differences between DACs, they are truly tiny, and any time spent trying to hear them is just time that could be better spent listening to music, and moreover that anyone who focuses on this as a serious issue cannot be...
I thought you might like to know...   One day I was testing a radio (transmitter/receiver) at work. It was a 12 Watt shortwave military radio with a built in antenna tuner.   The radio was obviously turned on and the antenna tuner was cranked right up to the extreme end of its adjustment, but there was no antenna connected.   Somehow, as I picked up the radio, I managed to operate the transmit key while the finger of one hand brushed the antenna...
It's not DIY, but a Sansa Clip+ has good sound, goes pretty loud, drives most phones, is a nice thing to have, and is nearly inside your budget. You need access to a computer to get tracks onto it, but you must have that if you can post here. It's probably the single best value-for-money hi-fi buy.   A Behringer UCA202 USB DAC/ADC is another cheap, good-value hi-fi item, drives most phones, maybe a bit quiet with some, works for recording too.   You can get a DAC...
  Oh, no, I understand that aspect all too well. I simply don't approve.     It's not so much the guy selling the piece of gear, it's the guy who's buying it, who, in your words 'thinks he has to own the best of everything' when there are people in the Congo with a yearly income of Int$373. Maybe you think that the guy buying the gear is so much better than the guy in the Congo that he deserves to be in that position, but I think that for the large part it's sheer...
  I'm not entirely sure that that's true. Certainly in the UK the gap between rich and poor is increasing, and if it continues to increase, not only will it have a negative effect on social cohesion, but the UK, as a country attempting to compete commercially in a World of countries, will be at a disadvantage, because poor also means poor health, poorly fed, poorly motivated, poorly educated. And rich guys don't fix the toilet.   Look at Russia. A century...
  Now that is a good point, which hadn't occurred to me.   w
We tried engine turning on a CNC mill at work, the effect was very good, but very expensive, because the brush would wear and the effect changed from one side of a panel to another, so you had to change the brush frequently. One botched roundel and the panel was irretrievable in some cases.   w
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