What kind of quantities do they consider worth it to bother? 1000? 10,000?

probably around $100K for the dual parts would be my guess, from speaking with them.

I am preparing a 3D modelisation (google sketchup) of the amp. I would like to know the dimentions of boards: off/on heatsink and the PSU.

After, I will propose a groupe build for a custom Hifi 2000 3U chassis (with external heatsink or not) made by Modu.

thanks

power supply is 9 x 7.5 inches, heatsinks along the long side.

amp with on board heatsinks is 8.25 x 6.25 inches

amp for side mounting is 7.2 x 3.9 inches

Is it possible to allow for more room for a larger transformer for those who like a little larger current output for better regulation, full encapsulation etc.?

Of course it's possible! Just put it all in a bigger box.

Or if one wants to keep their outboard heatsink creation "slimline" they could do a two box build with umbilicle.

(then hide that ugly, oversized psu box and voila! you have a purty little kgsshv amp, kinda like a bhse without tubes.)

just my 2cents....

FWIW, my KGSSHV is a "big box build". It has all onboard heatsinks in a ParMetal 16X16X4 inch case.

I just upgraded the wimpy dual 475V @ 100ma 4" diameter donut to a dual 500V @ 400ma 5.5" diameter monster.

BIG overkill here, but more importantly, there aint no more room inside my case.

Just to give you an idea of the spacial limitations for this build in a single case.

Here I go crappin on Lil Knight's thread again. Sorry!

~125 KGSSHV's and counting....

Edited July 6, 201114 yr by livewire

I just upgraded the wimpy dual 475V @ 100ma 4" diameter donut to a dual 500V @ 400ma 5.5" diameter monster.

BIG overkill here, but more importantly, there aint no more room inside my case.

.

Now, you're talkin'.

I added 1 set of Dynafet and more PSUs

Please make a prototype and have someone test it. 100 boards is too big of a risk in my opinion.

+1

-- o --

Rodrigo

I have no idea of the price of boards, overall, a set for a kgsshv will be how much? according to price, my number of boards will vary.

how thick will these boards be?

What kind of quantities do they consider worth it to bother? 1000? 10,000?

just did an estimate and i would have used about 1,750 2SJ109 total, since I started with Gilmore's designs almost a decade ago. Hardly puts a dent in anything.

if they could do a 2SK389 + 2SJ109 totally matched and put it on a SOIC-8 now that would have my attention.

if they could do a 2SK389 + 2SJ109 totally matched and put it on a SOIC-8 now that would have my attention.

Yeah, but wouldn't you need more than eight pinouts? If they were to keep the devices "discreet" it would require 12 leads.

Tying the complimentary N & P gates together internally would still require 10 leads.

If the sources were also connected together along with internal limiting resistors, it could be done with 8 leads.

The last two options would limit the use of the SOIC device for other designer's parameters.

I'm a little drunk. I think I'll shutup now.

Edited July 7, 201114 yr by livewire

how thick will these boards be?

If I were to guess, industry standard for this kind of stuff would be 1/16 of an inch thick.(~.062)

Military spec

Can do a run of teflon or arlon boards.

Then gold plate everything.

You won't like the price.

Can do a run of teflon or arlon boards.

Then gold plate everything.

You won't like the price.

but won't the teflon make the sound more neutral, while the gold adds lushness?

edit: adding a "" to qualify the statement

Edited July 7, 201114 yr by El_Doug

Speaking of silly, omron just released a new relay

compatible with the step attenuator. VSWR of 1.1

at 1GHZ. So we could up the frequency response

of the step attenuator from 400mhz to 1GHZ...

You won't like the price.

...and when has that ever stopped us?

The arlon boards are about $150 each in 6 layers

The relays are $25 each

You can spend silly amounts of money on the resistors.

So say $1000 per balanced channel is not out of the question.

This is certainly going to slow down most people.

I'd rather just have the RK50 though.

But a RK50 is not flat to 1GHZ

i think thats a good thing

Is this the point I start investigating how cheap I can get RK-50s here?

Is this the point I start investigating how cheap I can get RK-50s here?

.

Obnviously the answer is YES..!!

RK50's and the P&G units are the best analog pots available.

RK50 can be put on a circuit board, the P&G have to be hand wired.

The P&G is also only available in 10K with a 20K custom order. Not really an issue except for crazy people like me who use and like a NOS dac and tube CDP's...