Everything posted by mypasswordis
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Optimizing build order in Starcraft II using GAs
It's in your blood, you can't avoid it
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Optimizing build order in Starcraft II using GAs
It's in his blood, he can't avoid it
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slow forum
NFSW -> http://imgur.com/xm2aH.gif
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Holy Crap! The New Stax Omega Looks fierce! (Stax SR-009)
But don't have $5k to spare. Thanks for the impressions, I'll definitely want to try it out at some point.
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Rally To Restore Sanity and/or Fear
I think I'm up for dinner tomorrow and maybe the rally but not if the metro is crammed full of people and it takes like 3 hours each way when it should only take 30.
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Post the last thing you bought!
x2 I want moar heifetz vinyl
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slow forum
http://www.youtube.com/watch?v=jjWDg1r_N6Y
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B&W 802 Series 80 repair
It's definitely worth doing and must be done. Electrolytics need to be replaced every 20-30 years because the electrolyte dries up/evaporates.
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B&W 802 Series 80 repair
Yup, there are other deviations from the ideal capacitor than ESR like ESL, dielectric absorption, temperature fluctuation coefficient, non-flat capacitance with respect to input frequency, etc. Also the amount of loss is nonlinear with respect to frequency so you can't even model it by adding a simple resistor. I just realized, electrolytics have improved over the years so the ones you replace the old ones with may very well have lower ESR and better characteristics in general anyway.
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B&W 802 Series 80 repair
Basically they admit to using cheap electrolytic caps and say that they tune the values with the losses in mind. So if you want to replace the caps with better caps, you have to compensate somehow. But yeah, if you're just going to replace them with same value same type capacitors, make sure the electrolytics are nonpolar or they're going to blow.
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Rally To Restore Sanity and/or Fear
pls gimme names and numbers kthxbai
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Suggestions for upgrading/entry
Team ortho: find some ortho drivers to mod into the A700s while fixing them and mod them to taste
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B&W 802 Series 80 repair
Hm, I'm actually learning this now, so please correct me if I'm wrong. When I have time I'm going to derive the transfer functions for the various order Butterworths and draw Bode diagrams but I'm busy right now. 4th order Butterworth, high pass on the tweeter, band pass on the mid, and low pass on the woofers, the diodes just before the drivers in conjunction with the cap to ground form a half wave rectifier with a zener diode shunt regulator to power the protection circuit which has got some Sziklai pair thingy going on?
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Deals
1 Sale A Day, Daily Deal 2 pack breathalyzer ... just sayin
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Rally To Restore Sanity and/or Fear
I might actually be going to this after all. Will hopefully update with confirmation either way soon.
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Suggestions for upgrading/entry
I think every single one of these newbie threads has included the closed Denon headphones. WTF? Maybe they need to get a welcome PM for the welcome PM.
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What did you do today?
- B&W 802 Series 80 repair
Deoxit is awesome. I used it on my vintage receiver, brass rings on my Concept CE-H, lighting fixtures in the kitchen, etc. and it's very effective. Digital xovers ftw but that's a little involved.- B&W 802 Series 80 repair
Yeah, if the binding posts still make good connections I'd just leave them. But if the crossovers have electrolytic caps, it'd be a good idea to replace them. Edit: Nvm, do replace the binding posts. And caps if they're 'lytic. Should be pretty straightforward, depending on how easy it is to open up the cabinets.- What are you listening to Part Two
Wouldn't say most, but a lot of it is corny so I mostly agree- Ipod Touch / Iphone
Surprising they sold any of them. Something is not letting me download and install VLC on my touch, as of last night. Will try again tonight. I think it's going to be an epic fail as the 8GB is ye olde 2G technologie.- slow forum
- What are you EATING right now?
3 eggs sunny side up (salted), 2 slices whole wheat bread, big bowl of pasta salad (farfalle, broccoli, cauliflower, spring salad w/ dressing), bowl of oatmeal w/ a bit of sugar and honey. washed down with 3 cups of milk- Holy Crap! The New Stax Omega Looks fierce! (Stax SR-009)
Yes? 1.35 to 2 micron is approximately 50% increase in thickness. Then multiply that by the area and density. Just ask yourself, why would Stax start off with a diaphragm that was maybe 5 microns thick in the 60s and 70s and then evolve to its current 1.35 micron thickness today with better manufacturing techniques? To make their headphones sound worse?- Holy Crap! The New Stax Omega Looks fierce! (Stax SR-009)
And hysteresis increases with increase in mass as well. You don't want a flexible wobbly diaphragm, a stiff one is much better at reproducing the signal without introducing distortion. Both lowering mass and having stiff material raises the resonant frequency of the system. - B&W 802 Series 80 repair
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