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Old 7th January 2014, 04:59 PM   #21
BigE is offline BigE  Canada
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I won't be using it in the full 2.4 kVA capacity, actually just below 1.5.... so that gives me some confidence. Thanks!
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Old 8th January 2014, 08:42 PM   #22
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Default Soft Start, v3 Bill of Materials

Hi Jason

Some feedback on the latest BOM from your post in Dec 13.

D1 – D4 Rectifier diodes should be qty 4?

1 LED – Mouse part ref does not work for me in the UK. Could you suggest some alternatives? Or provide some more info like it has to be a 3v, lead space 2.54 etc. I found this one, would this work?
C503B-GAN-CB0F0791 Cree, Inc. | Mouser
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Old 8th January 2014, 09:20 PM   #23
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steve
i think there's a transposed letter in the part number for the led. It should read 78-TLHR6400.
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Old 8th January 2014, 09:21 PM   #24
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and yes, qty of D1,D2,D3 & D4 should be 4.
I'll make the changes and send to Jason.
Andy
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Old 10th January 2014, 09:41 PM   #25
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Here's a couple of pictures of a completed board.
I used the Keystone 30A screw terminals instead of the Fast-On connectors.


Click the image to open in full size.

Click the image to open in full size.
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Old 14th January 2014, 05:34 PM   #26
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Andy
Tidy work!
These pictures will be a really useful reference when I come to build.
Steve
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Old 21st January 2014, 10:01 PM   #27
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Default My Soft start board is built!

Hi Jason and ToeCutter

Just some comments about my build. Mouser in Europe (Germany) had run out of a couple of the resistors so I picked an alternative brand for R3-6 (Green Vishay) I tested all the resistors before soldering in.

I also picked a green LED, slightly different forward voltage, thanks for confirming it would be OK.
Really useful to refer to the photo of your built board ToeCutter esp for polarity of C3

Based on the post below I will remove the one thermistor (TH) and I guess just solder the leads from the primary together. Note UK 240v
F5 Turbo Builders Thread
"If using the Soft-Start, you may omit the thermistors in the transformer primary"


Cost about £50. for parts, pcb and shipping.

Are there any basic checks I should make before connecting to my amp and turning on?

I will install and update you all by the weekend
Attached Images
File Type: jpg Soft Start Board by SH Jan2014.jpg (650.0 KB, 509 views)
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Old 23rd January 2014, 01:52 AM   #28
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Can anyone provide the dimensions of the mounting holes of this board (v3)? I first assumed they were 40x80 but the store says the board outline is 55x110 and looking at the pictures posted here this doesn't look right to me. I'm also looking for the hole dimensions of the speaker protection board as well if you have them.
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Old 23rd January 2014, 03:10 AM   #29
Bones13 is offline Bones13  United States
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I can measure tomorrow, but the measurements on the website look correct. I can tell you positively that the V3 board fits on the 10x10 grid. The 40 looks right on, I agree that a 110mm long board, with 80mm long spacing does not look to match the board pictured above.
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Old 23rd January 2014, 12:02 PM   #30
BMW850 is offline BMW850  Netherlands
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I would like to purchase 2 boards.
But I have 2 pieces 2000Va 2 x 42 volt toroidal transformers. (220/240Vac)
2 x Mundorf MLytic 80V 47000uF High Current = 94000uF for 1 power supply
Is there a problem with this soft start or can I use this with no problems.

Regards,
Rudy
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Last edited by BMW850; 23rd January 2014 at 12:09 PM.
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