Another NXV-500 r2! - diyAudio
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Old 12th April 2014, 02:15 PM   #1
palmito is offline palmito  United States
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Default Another NXV-500 r2!

I've been gathering the parts for over six months (buying things as budget allows). I finally had everything I wanted but the case. I wanted to put the heatsinks inside the case, so I had Parmetal make me a custom sized case. It turned out looking a lot bigger in real life than in paper...

I debated whether to build the amp or rent the case as a small apartment to a graduate student.

But I finally got the case late this week. Work has gotten very busy so this will be a slow build. But here's the photos of the case and the parts.
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File Type: jpg all_parts_but_case.jpg (583.9 KB, 411 views)
File Type: jpg case.jpg (642.0 KB, 383 views)
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Old 14th April 2014, 01:06 AM   #2
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Hey Frankie

Great to see you have made a start on your nxV500 R2 stereo amplifier.
Please continue to post your progress with lots of photos.

I will look forward to seeing how it turns out.

Cheers

Anthony
HPA
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Old 14th April 2014, 02:21 AM   #3
palmito is offline palmito  United States
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Hi Anthony! Better late than never...

Having the Volt One and the extra transformer did make layout a bit harder. I probably should have gone for two Volt Ones as you suggested just for ease of laying things out.

I will keep posting photos of the build.

Thanks for a the great support!
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Old 23rd April 2014, 03:04 AM   #4
palmito is offline palmito  United States
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Default I have a layout question!

I'm planning on placing the power supply boards (and volt one) over the toroids, using a diyaudio store amplifier chassis bottom (the thick metal ones). The metal sheet is magnetic (steel, not aluminum). See the photo below.

Is the metal base enough shield to protect the ps boards from being so close to the top of the toroid (where the stray fields would be strongest I think)?

I could place the metal sheet perpendicular to the position in the photo so I can slide the ps boards away from the toroids and only the rectifier portion of the ps boards would be above the toroids. Would this be a better arrangement?

Or the boards are shielded by the metal sheet?

Or is using the steel sheet a bad idea (use aluminum instead)?

Thanks in advance for any suggestions.
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File Type: jpg stack.jpg (432.2 KB, 355 views)
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Old 10th May 2014, 01:04 AM   #5
palmito is offline palmito  United States
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Default Some more progress...

The cnc shop drilled the xlr connectors crooked... I tried fixing the holes but didn't get them completely square, but it lools better. I know it doesn't affect the sound, but I just wanted them to look a bit better.

Put the feet and trafos. Ended adding one more foot to the chassis in the between the three trafos, it's a lot of weight.

Put in the AC controlling boards.

Added the "second floor" for ps boards.
Attached Images
File Type: jpg feet.jpg (313.3 KB, 246 views)
File Type: jpg back_panel.jpg (231.3 KB, 223 views)
File Type: jpg trafos_and_back_plate.jpg (416.3 KB, 82 views)
File Type: jpg trafos_boards.jpg (412.1 KB, 136 views)
File Type: jpg more_boards.jpg (338.3 KB, 164 views)
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Old 25th May 2014, 01:38 AM   #6
palmito is offline palmito  United States
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Default More progress...

I fixed the AC control parts. Had a problem with the HPA-Power-One, so for testing I'm leaving it out of the wiring.

Drilled the "second floor" metal plate and ran trafo wires through the holes.

Fixed the metal base and heatsinks with amp boards, started wiring the power supplies to the amp boards.

Forgot to mention I tested the power supplies and all tested ok (no load output) and I set the Volt-One output to 80v, no load. Will readjust, per Anthony's instructions, after the amp boards are connected.
Attached Images
File Type: jpg wired_ac_parts.jpg (631.7 KB, 103 views)
File Type: jpg second_floor_wired.jpg (500.0 KB, 93 views)
File Type: jpg attached_second_floor.jpg (452.5 KB, 125 views)

Last edited by palmito; 25th May 2014 at 01:42 AM.
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Old 26th May 2014, 01:22 PM   #7
emyeuoi is offline emyeuoi  Italy
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Good progress Palmito

This "second floor" remember me my F5T v2
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Old 9th December 2014, 09:27 PM   #8
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Any progress on this?
__________________
Anything worth trying is worth failing at once or twice.
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Old 12th December 2014, 03:54 PM   #9
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I guess not
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Old 12th December 2014, 04:25 PM   #10
palmito is offline palmito  United States
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Default Sorry

Sorry guys. It is finished and has been burning in for about a month. I will post the final photos and a review in the next couple of days.
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