i'm on a roll... the kgsshv

[spritzer]

It took me 3 days to get LSK's from Trendsetter and they had plenty in stock.

I'm glad I got the bright idea not to start drinking coffee even though I go to work in the middle of the night. Now my Pepsi Max habit is probably worse though...

[struts]

It took me 3 days to get LSK's from Trendsetter and they had plenty in stock.

Thanks spritzer. Is A, B or C best for this application?

[luvdunhill]

Thanks spritzer. Is A, B or C best for this application?

A

[digger945]

funny you mention the lsk. Got the idea some time back for a vertically mounted opamp servo for jfet amp from the lsk389 soic & pcb gb on diya. Not yours the other GB.

[luvdunhill]

funny you mention the lsk. Got the idea some time back for a vertically mounted opamp servo for jfet amp from the lsk389 soic & pcb gb on diya. Not yours the other GB.

[kevin gilmore]

http://gilmore.chem.northwestern.edu/kgsshvbomas.xlsx

will get to the rest of it today. My server will go up and down a couple times

today for updates...

[jgazal]

A

Which is best? Linear LSK389-C TO71 (metal can) or Toshiba 2SK389-GR?

[luvdunhill]

Which is best? Linear LSK389-C TO71 (metal can) or Toshiba 2SK389-GR?

They will all work well for the front end, it's not picky in terms of Idss. I'm guessing Kevin won't support the Toshiba parts on his PCB, so that leaves the Linear Systems parts. I believe the A parts show less noise. There was an article in AudioExpress than confirms this, if my memory holds.

[kevin gilmore]

as far as i know the 2sk389 is a discontinued part, and while there are places that

still have them, i see no reason to layout the board for that part anymore.

Its setup for the lsk389 can and the individual fets.

[forbigger]

so with all the recent completion or almost completed BOM, how far away are we from the group buy in the horizon? another 2 or 3 or 6 months or still unforeseeable future ? gotta start saving if not so long into the future. thanks

[guzziguy]

Start saving Budi.

[forbigger]

hi Ken, was in town briefly couple weeks ago.....thinking of dropping by to you for a visit but gotta attend my kid birthday so decided to rush back. promise my self to eventually visit you or you to visit me again.

[spritzer]

There is no fixed date for any of this and we are still working on making this project as idiot proof as is possible for something this nuts.

[Nebby]

There is no fixed date for any of this and we are still working on making this project as idiot proof as is possible for something this nuts.

Do you mean reasonably idiot proof or head-fi proof? [/couldn't resist]

I'm thinking I'll build it when it's ready even though I don't currently own an O2.

[kevin gilmore]

I really want to use 2SA1968LS for the current sources. Then the entire amp would be isolated parts. Way easier.

AND 100% head-fi proof. Even trevornetwork could build one and get it to work first time. (complete with plexiglass chassis)

With ONsemi recently purchasing sanyo semiconductor, who knows what is going to happen. Not going to

make boards that go instantly obsolete. I could use ixys parts instead. I may have to. Plus there are other

things throwing monkey wrenches into stuff. If anyone in japan can help...

My good friend Jeff who is the supplier of the vehicle necessary to take 400 lbs of aluminum to the polisher...

His mother of 90 years passed away last night at 7:40. So i'm going to be another week late on that.

Maybe longer. At least 8 of the T2 chassis are fully finished, and the last 4 will be as soon as more

top/bottom material shows up. Speaking of which,

I ordered a bunch of .25 inch material for the kgsshv chassis. .5 inch material showed up, and the wrong kind

of aluminum in addition, so that has to go back and try again.

I understand why justin is late on a lot of stuff. And he is doing at least 25 times the stuff per week that i am.

I'm off to pick up a very special package from japan courtesy of someone with a heart as big as all of iceland.

Edited August 24, 2010 by kevin gilmore

[forbigger]

in that case i take that the answer will be unforeseeable future.......now my wallet can rest a bit

[kevin gilmore]

This is not going to be a one time thing like the T2. There will be a call for board sets, and i will (or someone else will)

do a board run of that many plus a few spares. Board set should be about $100.

[forbigger]

thanks kevin. I take it as there will be multiple call for group buy ranging from say board, psu, casing and other components? CMIIW

[deepak]

thanks kevin. I take it as there will be multiple call for group buy ranging from say board, psu, casing and other components? CMIIW

I believe they are going the board mounted heatsink route so there should be no need for a chassis group buy.

Though I could probably never build one, I'm still interested in seeing the solid state version of the T2 come to fruition

Edited August 24, 2010 by deepak

[forbigger]

i'm a total idiot when it comes to diy as i'm asking help my local diy-er to do it for me when everything is ready. reading your post above, we still need a casing even with the board mounted heatsink right ? but only a more generic - hammond casing will do?

[kevin gilmore]

You should be able to cram it into anything with a 14 x 14 x 3 inside dimension, but it will be tight. Bigger would be better.

Lots and lots of holes top and bottom.

I now know why the srm727 sounds like shit... Whoaboy...

[Les_Garten]

There is no fixed date for any of this and we are still working on making this project as idiot proof as is possible for something this nuts.

Well... Just keep in mind, some of us Idiots are VERY resourceful...

[spritzer]

We will cover most of the common pitfalls but if you can manage to cram the right parts in the right spots then the amp will function. The same holds true for the normal KGSS.

As for a chassis, basically anything which will fit the boards/transformer/attenuator works. The Hi-fi2000 cases are cheap and look ok.

[Nebby]

The Hi-fi2000 cases are cheap and look ok.

And rudistor approved! I wouldn't mind a stateside group buy of Hifi2000 cases for the KGSSHV, that would be quite convenient.

I do wish that ATI cases were still around, I rather liked their designs.

[manaox2]

And rudistor approved! I wouldn't mind a stateside group buy of Hifi2000 cases for the KGSSHV, that would be quite convenient.

I do wish that ATI cases were still around, I rather liked their designs.

I would be in for that.