dsavitsk

Happy Birthday!

Happy Birthday!

More or less. But the paper works well. I like to see the whole thing at once.

I tried some of the software offerings and found that they did not really fit my needs. So I decided to go old school. I bought a big roll of grid paper where I can put dates across the top, projects down the side, and keep track of lots of aspects. So far it works pretty well.

Happy Birthday!

Thanks. I feel older on this birthday than on any previous one.

That seems like a lot of effort for 18 parts. Have you looked into small ovens? Or hotplates? http://dangerousprototypes.com/2013/03/14/workshop-video-59-946a-solder-reflow-hot-plate-workshop-video/

I don't either, but I can cut 12 of them, put them in a circle, and divide the error by 12.

I spent the day trying to cut a chunk of wood with a 30 degree angle. After a few tries, I am as close as 29.996. That's probably going to have to work.

http://www.chicagomusicexchange.com/ It's a drive. It is worth the drive.

And that's really the point. This is your opinion. It happens to be one I agree with -- I am, and have been, a proponent of CCSes in audio circuits for years. I think they are almost always the right decision -- but that does not mean that other solutions do not have merit, and that there aren't good reasons for someone to solve a problem in a way I might not. The world is not black and white. The above discussion seemed to suggest it might be.

Even with all your justifications, which I'll stipulate are true (a CCS will reduce resonances, divert more output to the load, and lower distortion), there are good reasons to use a choke load. Chokes store energy and can swing above the power supply. As a consequence, a CCS loaded tube needs a power supply more than double the voltage of one with a choke load. Besides the huge reduction in efficiency and the need to dissipate the heat, this also requires the use of a very different class of high voltage components and very different construction techniques. Building a 400V supply is trivial. Building an 800V one is not. Additionally, while the choke load will have more distortion, almost all of it is at low frequencies where distortion is considerably less audible. Your 200H choke may only provide a 50K load at 40Hz, but at 1000Hz it is well above 1M2 Ohm which is on par with a CCS. For reasons of safety, personal comfort in working with high voltages, or possibly even cost, the trade off of slightly increased low frequency distortion chokes may be justified in some cases. You don't have to use them, but it does not mean that they are a blanket bad idea. And Lundahl makes a 270H choke, so 70K at 40Hz.

“You on point, Phife? Malik Taylor, Phife Dawg of A Tribe Called Quest, Dies at 45

I wouldn't actually wish this life on anyone, but I guess some people like it.

I suddenly find myself inundated in projects, all with different final deadlines, and all with multiple progress points. For instance, I have a project I want to complete by May 1, but in order to do that I'll need to complete part A of it by March 30th, and part B by April 14th, and send out part C by March 21st, etc. There is obviously lots of project software out there, but most seems geared toward groups, or has too many features. I am looking for simple - no need for discussion boards, bug tracking, user management, etc. Does anyone know or use something that works well?

Happy Birthday!

It is a Ravenswood (DSHA4) power amp for headphones. We did it this way as Adam already has a preamp, so there is not much sense in doubling up on them. Here's another one in a powder coat case.

Happy Birthday!

More similar than not. The primary changes are in the power supplies with a few in the digital circuit.

Working on it ...