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Everything posted by kevin gilmore
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that is what sound cards and software are for...
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well its line level in and out, so a tweeked version should work for planar magnetics
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Its going to be tuneable. And all analog. Eventually it might end up as pure dsp, that is going to take a while.
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I now have 9 sets of heatsinks done, 15 sets of fronts/backs done 8 sets of tops/bottoms done (in addition to the 3 sets of everything already shipped) going to do 6 knobs tomorrow and a bunch of stax jacks (5 and 6 pin) next week. 2 chassis with knobs should go out for finishing on friday or monday. Spritzer gets a different color knob. Only thing left to do is measure for and make the mounting brackets for the DACT. Unless i decide to do something stupid like making aluminum feet. Or titanium feet, or some other very silly thing. Gold/platinum with or without diamonds available special order
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Those caps need to handle 600 volts DC. So anything that fits that can do that works.
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Not balanced he doesn't...
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Yet another stax project soon. A lot of people are going to want this i think. Birgir knows what it is, and had better not drop any hints hint: diffuse field.
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You definitely NEED 20 gauge for the filament wires ! And a 16 gauge wire for the master ground.
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I found an even better place for wire, i have the link at home. I think this is it. http://www.bulkwire.com/wire-cable/ptfe-high-temperature-stranded-wire.html One other thing, if you contact the ebay seller and ask him for a special 10 color package, he will do it for you. You really do want teflon insulated wire rated at 600 volts. So the measured distance between the transformers is exactly 3.75 inch which is a tad over 97mm If you use the hole .5 inches in front for the center transformer, its 3.95 inches. But that might be too close to the board, will look later.
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I'm going to add a second opinion that the 3D21 is a good tube for this purpose.
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84 va out, 97 va in i'll measure the mounting holes on the transformers, 97mm might fit, but all the wires will have to go over the transformers. Take a look at the power supply pictures.
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The heating element is wrapped and insulated with asbestos. You really don't want to mess with it. If you are desperate to have it fixed, take it to a shop that will fix it, and let them worry about the hazards.
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craig asked that i publish the info on the transformers, should you decide to have them made elsewhere... high voltage transformer 2 are needed diameter 3.5 inches height 1.7 inches you can actually go up to 2.5 inches high, and slightly wider full load voltage---- regulation--- Iac--- off load 475 --- 15.04 --- .13 --- 546.4 285 --- 10.53 --- .06 --- 315 75 --- 10.6 --- .06 --- 82.9 filament transformer diameter 3.5 height 1.6 30 --- 13 --- .5 --- 33.9 Center tapped 6.3 --- 14.29 --- 1.5 --- 7.2 6.3 --- 14.29 --- 1.5 --- 7.2 6.3 --- 14.29 --- 4.0 --- 7.2 6.3 --- 14.29 --- 4.0 --- 7.2
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Comes with stax connectors. the attenuator piece of metal will be included for those who need it once i make it. Which is after a bunch more of the stax connectors with the 6th pin added, and the knobs.
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Bring about 50 lbs of ultra prime grass feed filets with you... You guys get better beef for the most part... We get all the stuff with hormones in it.
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Be careful frank, people will pick on you for your chicken scratchings... They picked on me for years till i started doing pdf's of everything... At least your chicken scratchings are far neater than mine were. The bias resistor really does need to be at least 5 meg, and 600 volts direct is a bit high.
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Yep, 19 board sets and 19 chassis sets. Actually its 20 of each, but one heatsink got damaged. There is a chassis set for every board set. If the people that bought boards decide not to buy the chassis, then i'm going to have spare chassis sets. I should have 3 more chassis sets ready to ship in the next month. I'm doing it a bit slow because i'm already invested to the tune of $13k and don't really want it to go any higher because i have the kgsshv board set comming up soon. Even with the replacement heatsinks someone is going to have to do mounting bars, and front and back, and possibly modified top and bottom panels. Still its a bunch of work. Also have to come up with an easy to do chassis for the kgsshv.
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Tyll will be putting up all the graphs soon. No idea where yet. Could even be my server as its not for profit.
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Copyrighted info... will get the permission to share... They are pdf's... As soon as i get permission i will post the links.
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I got newer graphs from tyll/audeze and at least they don't show the rise to infinity at 5khz. I commented over there too. If you think i'm dumping on these headphones then you clearly do not understand. I will be getting a pair. I will customize the open loop version of the dynafet if necessary to maintain as flat a frequency response as possible. They are definitely better than the he5/6. I want to nail down where these inconsistencies are coming from, it could be the software tyll is using. But we will surely get to the bottom of this. I'll be doing my own testing once i get them. On my own equipment which is different from tyll's. Closest thing to a stax diaphram yet. My krell preamp has a phase button, and absolutely i can tell. Classical music on speakers, it is instantly noticeable, one is clearly right and the other is not. The switches on the hp1's are exactly phase switches.
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Sure seems like people over there are mis-interpreting my comments. Lots of people can detect differences in absolute phase. Tyll's graphs clearly show that the absolute phase was 180 degrees out. That is both channels were wired opposite of every other headphone he tested. Not one channel out of phase with the other channel.
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I like the Lou Malnates better, there is one of each within about 2 miles of my house. Life is a bitch. Next year maybe one of the all you can eat sushi places. And oodles of sake.
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I showed tyll's photo above to one of the women i work with. All she said was poor choice of shoes.
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We got to get people to use decent stax jacks. Otherwise it looks kickass.