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Old 14th January 2005, 02:24 AM   #521
Coulomb is offline Coulomb  England
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Quote:
Originally posted by rabstg
Coulomb

If your trying to make me paranoid it's working.



Actually I am winding you up! Your last several messages make no mention of the Wiki link that you said you would put in every message if nothing else but to drive us nuts.

Regards

Anthony
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Old 14th January 2005, 03:42 AM   #522
troystg is online now troystg  United States
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You've been wiki'ed

http://www.diyaudio.com/wiki/index.php?page=KSA-50Wiki
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Old 14th January 2005, 05:43 AM   #523
Jozua is offline Jozua  South Africa
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Hi

It is incredible that there are people in this group who were prepared to do all this work and provide their expertise for free for an unseen group of people they have not seen or met. To me that says a lot for the calibre of people who are members of this audio- community.

I can only convey my deepest felt appreciation for these people who have made this project possible. I would never have even considered tackling a project like this without knowing that somewhere across the world is a group of serious audiophiles who are quietly and without much fanfare building KSA50 clones.

Many thanks to all.



Jozua
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Old 14th January 2005, 06:31 AM   #524
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Troy:

Of some unknown reason, I'm not able to email you

The file Krell-Clone KSA-50 ll Comb Copper (Resist) file IS the solder mask.
The file named Krell-Clone KSA-50 ll Comb Copper is the copper.

Just email me if you have any further questions
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Old 14th January 2005, 11:55 AM   #525
NUTTTR is offline NUTTTR  Australia
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Default Some parts?

I've got wiring by the truckload here (well, a couple of 10m spools will be enough, and some high quality OFC rca cabling)
But i've had a few more transistors arrive today Let's just say there's a "pretty penny" worth of transistors here It's to go into 5 channels.... There's another 60 transistors (30 pairs) still on their way, it's to give us some choice for outputs, i'm going for TO-3 21193/94's i think Cut a 94 and 04 (15004?) open and the 94 looks nicer... Maybe a SMALL (i mean microscopic) build difference, the plate the chip is soldered to is smoother with less imperfections
I'm looking for some copper bar stock (about 10ga thickness) for wiring it up, etc... Trying to organise heatsink looks right expensive (1m long piece by 250mm wide with 63mm deep fins) about AUS$150 !! But i'd need 2m for my amp (333Hx500W (that's 2 pieces side by side on 3 panels of the amp))... Should be good for ~250+w (at a low guesstimate, possibly more) per side... So here's my picture so far..... will get a wiring one up tomorrow
Aaron
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Old 14th January 2005, 12:04 PM   #526
NUTTTR is offline NUTTTR  Australia
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Default Just a heatsinking question

As a matter of ease (and the fact it's just not made in the size i need), i'm going to use 2x250mmx333mm(h) pieces of heatsink per side of my amp, can i simply use stacks of thermal grease (probably some expensive silver one) to put between the heatsinks and a - say - 4mm-6mm aluminium plate? and screw/bolt them down with a with LOTS of bolts/screws to make sure it holds tight and then have the - say - to-3's bolted to the aluminium plates (off the appropriate alloy brackets, which i can get made easily)... will this work? I'm worried about more metal making conductivity worse or something like that?
It'll just make contstruction 1000% easier
Aaron
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Old 14th January 2005, 01:15 PM   #527
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A friend sent me this last night and I thought I'd share it. Yes I have build a number of Pass amps and love them!

__________________________________________________ __

Nelson swiped the sweat of his brow with his forearm.
It was tough cutting through the yellow submarine bulkheads with his
Aleph
torch, but he was seconds away from opening the bulkhead. Finally it
crashed to the floor, revealing a severely damaged mutinous
crewmember, Mark.
Nelson spoke first, "Why, Mark, why would you give up the nirvana of
Pass!!!! Have I not shown you the way to perfect sound bliss?"
Mark grabbed his large X-acto wrench, charging, with the battle yell,
"No
one knows sound nirvana without also experiencing the bass of Krell!"
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Old 14th January 2005, 02:06 PM   #528
troystg is online now troystg  United States
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Hi Everyone-

I will be placing the order in about 6 hrs...

Get them in quick....

http://www.diyaudio.com/wiki/index.php?page=KSA-50Wiki
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Old 14th January 2005, 02:41 PM   #529
troystg is online now troystg  United States
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All who paid with PayPal-

All paypal receipts came with an address associated with it.

If anyone wants their boards shipped to a DIFFERENT place than their paypal-associated address please email me with the preferred address.

I am printing up shipping labels now and getting the packages ready so when the PCB's arrive I can add x amount in each package and ship out.

Thank you in advance,

Troy
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Old 14th January 2005, 02:43 PM   #530
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Default heatsink idea

Farnell.com: 4106003

This has a rating of 0.05 degC/W when force-cooled with a brisk (and probably too noisy) fan - might be worth seeing how it derates with a smaller fan (Papst do one that's rated at 12dB).

Would be a compact and cheap way of getting rid of a lot of heat - also good to arrange for the heat to get blown out of the box rather than using it to bake the capacitors.

I'll try it. I expect sympathy if it goes horribly wrong.
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