Kraemer Designs D~400 Hypex NC400 Mono Amp Build

dragoonxp20 · « **Reply #140 on:** 2 May 2013, 03:25 am »

What happens to all the scraps?

AluminatiSound · « **Reply #141 on:** 2 May 2013, 03:46 am »

Quote from: dragoonxp20 on 2 May 2013, 03:25 am

What happens to all the scraps?

I give them to my work. Honestly they aren't worth as much as people think.

We'll cash em in and get food and beer.

Matt

Julf · « **Reply #142 on:** 2 May 2013, 06:15 am »

Quote from: medium jim on 1 May 2013, 07:48 pm

they will act as a huge heat sink

Only until they reach equilibrium, and because of the relatively high idle dissipation of the ncores, equilibrium is relevant (like with class A amps, but unlike class A/B amps).

Julf · « **Reply #143 on:** 2 May 2013, 06:17 am »

Quote from: HighRez on 2 May 2013, 03:04 am

Do you have any plans to shield the umbilical cable that feeds the NC400 from the SMPS power Inlet cable?

They do run pretty nicely at almost-textbook 90 degrees to each other, so it is probably not an issue.

poseidonsvoice · « **Reply #144 on:** 2 May 2013, 12:12 pm »

Matt,

I agree with others - that build is absolutely insane, gorgeous! I think I like the innards better, because of the 'planning' involved with shielding, cooling and routing the wires.

Kudos! I know the chassis cost a bundle though - I'm sure a pair of them is as much as the amps with power supplies themselves.

You would make Bruno very, very proud!

Best,
Anand.

AluminatiSound · « **Reply #145 on:** 2 May 2013, 03:18 pm »

I just spoke with Bruno via email and he said the power wires/bundles being close together shouldn't be a problem.

Matt

AluminatiSound · « **Reply #146 on:** 2 May 2013, 11:42 pm »

Today I finally finished all the cases. The XLR connector hole was a little tight, so i opened it up a bit. The Cardas XLR drops in smooth

I will be assembling my pair tonight. Hope to post more pictures soon.

Matt

AluminatiSound · « **Reply #147 on:** 3 May 2013, 03:16 am »

Heck Yeah!! Got everything wired up and they work. Great sigh of relief

Empty cases.

Installed PSU delrin standoffs.

Installed PSU.

Amp boards installed.

Power wiring done.

Cardas and signal cable done.

Binding posts.

Wired up.

The lady was watching a movie upstairs. It was called "The Last Song" . Not the best movie, more of a chick flick but it has good sound.

I switched out amps with the D~400's and prayed they did not blow up. A few seconds after i powered them on, i heard a click and the sound came after.

First of all, absolutely no noise, like none. I usually hear a little with all amps but can't hear any with these.

I've only heard them for about an hour now but the sound is very different. Can't make a conclusion yet as i need to spin some records and listen to some digital. I'll run it for long period of time to check temps.

I'll post pictures tomorrow of them in my system.

AluminatiSound · « **Reply #148 on:** 3 May 2013, 10:57 pm »

Plans came up tonight, so not much listening but i got to snap a few pictures quick. I will be able to listen for a few hours tomorrow morning before i go out to the shooting range.

I installed the bottom cover today, i forgot it in my toolbox yesterday.

dr.sah · « **Reply #149 on:** 4 May 2013, 11:47 am »

Are those two subs?

AluminatiSound · « **Reply #150 on:** 4 May 2013, 12:51 pm »

Quote from: dr.sah on 4 May 2013, 11:47 am

Are those two subs?

Yes they are

Matt

bunky · « **Reply #151 on:** 4 May 2013, 01:47 pm »

I worked as a Aerospace cutter grinder/ toolmaker for a few years making flight parts for NASA's Goddard Space Flight Center in the machine shop. my brother in law is still there as a lead CNC machinist/shop foreman.it is a treat to see how good you are as a machinist at the young age of 25.what is amazing to me is that you designed and programmed the cases yourself at such a young age

I cant wait to show my brother in law this thread because I know that he is going to love your works of art.

AluminatiSound · « **Reply #152 on:** 4 May 2013, 02:25 pm »

Quote from: bunky on 4 May 2013, 01:47 pm

I worked as a Aerospace cutter grinder/ toolmaker for a few years making flight parts for NASA's Goddard Space Flight Center in the machine shop. my brother in law is still there as a lead CNC machinist/shop foreman.it is a treat to see how good you are as a machinist at the young age of 25.what is amazing to me is that you designed and programmed the cases yourself at such a young age I cant wait to show my brother in law this thread because I know that he is going to love your works of art.

Thanks bunky!!

Matt

AluminatiSound · « **Reply #153 on:** 5 May 2013, 04:38 am »

After running the amps for hours, they are just warm. Not hot at all. My pre amp is hotter then these are.

Matt

Mikeinsacramento · « **Reply #154 on:** 5 May 2013, 09:35 am »

Forget all that. What were you shooting?

rollo · « **Reply #155 on:** 5 May 2013, 02:27 pm »

It may be overkill but man O man they look sweet. Nice work young man, very nice. Enjoy !!

charles

Rclark · « **Reply #156 on:** 5 May 2013, 08:09 pm »

Indeed. Hoping one of these days I can send him my Optocoupler case and have him plant it into something fancy like it well deserves. Anyway CANNOT wait to see the anodized models of these

jtwrace · « **Reply #157 on:** 6 May 2013, 12:57 am »

Quote from: Mikeinsacramento on 5 May 2013, 09:35 am

Forget all that. What were you shooting?

Please review the rules here http://www.audiocircle.com/index.php?action=about;area=posting-guidelines

I don't make them but must enforce them whether I agree or not.

AluminatiSound · « **Reply #158 on:** 7 May 2013, 02:15 pm »

The cases are at anodizing. They will be back Wednesday or Thursday

Matt

Hank · « **Reply #159 on:** 7 May 2013, 05:19 pm »

beautiful work there, Matt!