luvdunhill

huh? no, definitely wire edm.

I haven't found a place that will do custom extrusions for less than a 1 ton order. I have a feeling that EDM is more accurate than laser cut, as it goes down to ~5um tolerances. Perhaps not needed here, but certainly doesn't hurt. I don't see any reason Kevin you should have to pay for them if this deal gets off the ground, the only issue is the fact that I have limited quantities Of course, a modified Dynafet board would be super cool, but it seems like it would be too hard to do... Specs attached just in case though!

Yes, via edm. Wire cut aluminum then anodized with appropriate tolerances to leave 0.1mm gap for silver epoxy. One side is missing fins so two can be coupled together for a complementary quad / differential input pair (my use would be BT clone). Handy huh? 0.1mm wasn't chosen at random. Thinner than that adhesion is lost, thicker and there is higher thermal resistance. Another interesting point is you can run V grade devices at full dissipation without any drift. Yeah Kevin, I had a problem with this and that circuit I showed you.

So, gathering interest for collaboration on KG's Dynafet. The way this would work is quite simple. There would be a group buy on parts as well as the boards. The parts would be supplied by myself and we'd work a deal out for people contributing in the matching efforts and various aspects of specing and acquiring parts. The boards would be the Hitachi version with external heat sinks, using KG's latest board files. Front end would be constructed from devices matched from a pool of 500 2SJ74BL and 500 2SK170BL matched to 20uA accuracy. All devices were pulled from original Toshiba packaging. Actually matched to 10uA with +/- 20uA measurement uncertainty added on top. The will be bonded together using couplers made on a CNC wire-cut machine. See attachment. I think the performance will exceed the single substrate versions due to the better matching characteristics. I also have 50 pairs of 2SJ79/2SK216 that will be need to be matched as well. These sell for around $10 a pair these days. Mine are all from the same batch code purchased in original Renesas packaging. I'm thinking there would be an upfront deposit of $75 per stereo set ($150 balanced) for the devices and matching efforts and a similar arrangement (probably $40 stereo and $80 balanced) for boards. Group buy participation is requisite on some member here "vouching" for you as well as an agreement that this isn't going to happen overnight and there is a lot of work that needs to be done to do this right. Everyone will have some sort of job to do, as this is really a group effort. So, anyone interested?

DigiPete: Hope you never loose an output device in that amp.. Thos Sanken devices can be impossible to find and the market is ridden with fakes.

probably shouldn't have posted that pic... probably just donated 250 hours of R&D to the new Singlepower power conditioner ... all he needs is a bling chassis..

Just curious, does anyone happen to have a variac I could borrow for a bit? If not, I suppose I could go ghetto...

... and avoid square rooms. I'd take a smaller rectangular room over a larger square room. Well, in fact I did make this trade off in fact with my mg12s.

http://www.borbelyaudio.com/pics/HB_DAC1704_V1_01b.pdf DI 8M DAC

I'll bow to whatever Pars finds when he works them. Just use a big enough tip, 50W, and lead solder, and you'll have a good looking joint after heating it up for 10 seconds or so.

they require the liberal use of flux

ok, well, I'd be willing to get some more Dynafet boards made, regardless of what happens here. Perhaps I'd do something similar to what I did with the Pass Pearl build thread here in the DIY section. Stay tuned.

maybe, maybe not Anyways, the amp is definitely doable and I agree with Spritzer, this is one of the reasons it would be the perfect choice.

Personally, I'd try and sell the amp. Then, we can work to make something nice for you. Since you paid for a top-tier amp, I'm assuming you'd still be interested in going that direction. I'd suggest starting with some of the new Bent Audio modules for attenuation and input / output selection. That leaves the main amplifier. If you are still looking for a solid state amp, then consider the Dynafet or the beta22.

IMHO, if you're looking for a preamp, starting from the list of available headphone amps and deciding which would make a good preamp is sorta putting the cart before the horse. Assuming you're looking for dual duty, I'd still start with a list of preamp designs. In my case, I was looking for a preamp with gobs of voltage swing, and even in this case, the beta22 would be a poor choice. So, everything in this thread really depends on your specific application.

diyAudio Forums - FS: Cardas female RCA (GRFA S Thick) - Page 1

you'll be fine then. Is this all you need? I might have a pair laying around somewhere, perhaps I can save you a few bones on shipping and what not. Otherwise, you might shoot naamanf a PM, he might be able to help you...

I bought a soldering iron just for these jacks. The blue Hakko dash works fine with the stock, giant tip. I think it's like $30.

you need a distillation column to get anything out of TPA these days...

yeah, B-Jade doesn't have much of a ring to it...

uh, what's the opposite of "scope creep"?

I just heat it up and then drill through the back of it with a suitably sized drill bit. Comes right out.

how long does it take to drill 150 holes?

bah, this is perfect application for my massive FPE skills