dsavitsk

It isn't easy to get to via public transportation. But, it is worth the trip.

Getting in is kind of hit or miss. I was actually really underwhelmed when I went. But, the friend I went with who was also unimpressed, went back and said it was tremendous. So, we seem to have been there on an off night. It really is. There is nothing fancy about it, but I'd go every night if I could. The potato croquet appetizer is really good. They also often have a grilled eggplant special that is amazing -- and I don't generally like eggplant very much. Actually, my wife and I tend to order just about all of the appetizers. Between the two of us, it is hard to spend more than ~$30. Oh, and to celebrate their 25th anniversary, Charlie Trotter's is closing, so if you have any inclination to go, now is the time.

Where in Chicago will you be? I'd add Avec to your list. And Frontera Grill or Topolobampo, particularly if you are downtown. Personal favorites, all in Lincoln Square/Ravenswood/Andersonville Spacca Napoli, Los Nopales (both were some sort of James Beard honorable mentions, or something like that, and both are easy to get to on the Brown line), Sunshine Cafe (a hole in the wall, good, cheap, and very friendly, but not trendy -- bit of a neighborhood hangout -- walkable from the Red line.)

Does anyone have a part # or source for the caulk like goo used to stabilize parts on a PCB?

Tomb has the PCB and the transformer in hand. It is just a matter of finding some time to actually assemble the thing.

Happy Birthday!

ftfy

Seems to work here -- I clicked the media player icon.

Value of a life is generally higher than the sum of the parts in this chart, though it is surprisingly close:

His rhetoric is ridiculous, his claims are unfounded and without citations, and his designs are boring. But, really, he has to release his project as a kit for DIYers? I don't see where he owes kit builders of the world anything. Who cares if he makes a commercial design. If you don't like it, don't buy it. But why does this guy have so much power over the audio world?

I don't know as I've never measured them -- you'd have to ask the designers. But, I am not saying that they are necessarily or always overdamped -- I am saying that with certain headphones they might be. And that when people describe certain headphones as being bright, or shrill, this may be the reason. It is really a personal preference. But, there has been an emphasis on amps with a near 0 Zout for a while, and my experience says that it is not always the right choice. By the way, take a look at the Zout spec'd for the Apex Pinnacle http://viewer.zmags.com/publication/b0edde2a#/b0edde2a/2 ~12R for low Z and ~45R for high Z cans is where my experience says the sweet spot seems to be as well.

It isn't necessarily the case that the source is bright, or even that the amp is bright. Instead, it is often the case that the system of amp + headphones is overdamped leading to a bright sound. People describe this as being clinical, or neutral, and often think it is more accurate. Some people even like it. But, it is not necessarily "truer."

Ran across this while cleaning out a closet. Good stuff.

They are almost surely standard M6 lams with the E's on one side and the I's on the other -- it is a SE amp and the transformers need to be gapped.

To grossly oversimplify, there are a number of ways to do it. One, as Ryan suggests, is to just have tons of inductance (this is the Lundahl way). Downside is more windings, and possible loss of linearity. Or, you can put a resistor in parallel with the output. For instance, on the "16 ohm" winding, with a 20R resistor, Grados would appear as 12R, LCD's as 14, Senns as ~18. All of these are likely close enough (like everything, the lams in transformers have a big +/- to their specs and you would generally design for worst case.) The upside is that if the load has impedance peaks, this reduces that effect to an extent (though this is hardly the case with most headphones). The downsides are that, unlike with multiple taps, there is a different power rating into different phones, and like a OTL amp, in order to have the voltage swing for high Z phones, you'll have too much gain for low Z phones. It also often requires a bigger core*, which lowers the quality, and increases the cost of the OPT. * for a given core size, each wire loop can handle a certain voltage before saturation (audio transformers are rated in voltage swing, not wattage as is commonly used). So, as the voltage needs of the primary increases, the number of windings must increase. For example, to put 1W into 300R phones with a 5K:300 transformer requires a primary voltage swing of 70Vrms. However, to do the same with a 5K:16 transformer, assuming a parallel resistor, the primary voltage swing is ~300Vrms. Thus, not only a bigger transformer with more copper, but also much more stress on the tubes, and forcing them to operate in a less linear range. Or, you can have multiple taps. The down side to that is it costs more, and makes the winding more complicated, and if there are too many taps, you can start to lose linearity. Where that happens depends on the particulars. Every designer makes the tradeoffs they think are appropriate, so there is no "right" way to do this.

That does not sound very charming to me. Try Innerfidelity

That would be much appreciated!

Well, the replacement (which was a Droid X, I think -- something older with a keyboard) is now taking a solo train ride. Any suggestions about what can be picked up now for cheap?

^ this, because this

Except, of course, the original version for which the name was coined ...

I am still fighting this battle -- my issue is that I can't find a case that is not horrible. And, the new mac mini has no cd slot. If you can do an Atom, which is probably enough, actually, the Lenovo Q180 does not look too bad. Building it yourself, I would go with a Intel i3 2120-T (http://www.newegg.com/Product/Product.aspx?Item=N82E16819115094) By all accounts has enough power that it will do what you want. The built in video is sufficient as well. With a sufficienty sized heatsink, you can set the fan to turn on at 45 degrees or so, and it will probably never actually do so (my 65W AMD's fan almost never does.) Put it in a mini-ITX (http://www.newegg.com/Product/Product.aspx?Item=N82E16813138327), use a laptop style (fanless) PS, and spend the money you would have spent on a videocard toward a small SSD.

Well, I think you guys are right. I have been defeated. It does not seem that the MS hypervisor, like vSphere, will output to the local monitor. Seems really bizarre to me, as it makes it so that the MS product does not differentiate itself in any way from VMWare, but is just an inferior product, so what's the point? The one I didn't try is Linux KVM, but I can't quite make heads or tails of the fm, so I am leaving it be. The upside is that once the bulk ripping is done, the needs will change and VMWare Player will be OK. Until then, I guess I am just running a Vortexbox.

Ryan pointed out to me that the DSHA is, arguably, a sort of cyclotron. Not done on purpose, but seems to fit the "floating bridge output stage" part of the definition. Sumo was good stuff.

That's the same as vsphere -- they just renamed it in marketing suff, though when you install it still says esxi. It isn't a money issue, or a hardware issue, it is a space and noise issue (and in the summer, heat -- if I manageto get this all working, i was going to pick up a 35W i3). Our apartment is tiny, so I am trying to pare down to one quiet computer -- essentially the promise of virtualization. In the end you may be right, but there are a few more things to try (downloading MS Hyper V 8 beta right now ...) I did just successfully go from 3 laptops down to one using VMWare player for a bunch of stuff

I am trying to simlify my life, and it is proving to be really complicated. Here's the story -- I would like to run a bunch of different software all on one computer. Most of it is not cross platform, or for one reason or another, I want to use various OSes for various tasks. Also, most of it is not goig to be in use all the time, but it would be nice if it was running when I needed it without a lot of configuration, and it would be nice to run much of it at the same time. Ideally, making this feel like a bunch of computers conected to a KVM would be perfect. So, for instance, I would like an automated cd ripper, a squeezebox server, and a music player. VortexBox will do all of that reasonably well. I would also like to connect to a TV for Netflix, other videos, and whatnot. VB is not appropriate. I tried installing X to it to make it Fedora, but certain things don't seem to work (Silverlight), so it looks like I'll need Windows. Additionally, I need to run FreeBSD for some software development. I also would like to run SQL Server as well as some custom servers that need Windows. So, a hypervisor seems like the right solution. First thought was Fedora/VortexBox as a host with everything else as clients. But, VB is built on 32 bit Fedora, so canot address enough memory for the other OSes to also run (computer has 8G). Additionally, I only have XP32, so Windows won't make a good host for the same reason. FreeBSD can't operate as a VMWare host, so that's out, too (VirtualBox has never seemed to work well for me -- but maybe worth another shot?). I have tried Ubuntu (or Fedora) 64 as a host, but this adds the complexity of clients within the host, and not being able to switch easilly between them, as with a KVM. This may end up being the only solution, but I don't really like it -- i was hoping for a keyboard shortcut to switch window views so that each OS could runit its own pane, but that does not seem to work, either. I also tried VSphere5, but the issue there is that it does not show local desktops -- as far as I can tell, you have to have a client computer to see the guest desktops, which defeats the whole purpose here. So, is there another way to do this -- a hypervisor that runs on the metal that can output the client desktops to the local monitor? Any other solutions?