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Critique my capacitor board for Adcom GFA-535/545
Critique my capacitor board for Adcom GFA-535/545
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Old 21st January 2017, 04:30 PM   #11
rayma is offline rayma  United States
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Quote:
Originally Posted by Phloodpants View Post
OK, I think this is better...
This shows the rectifiers as a vertical package. Which one is correct.
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Old 21st January 2017, 11:21 PM   #12
Phloodpants is offline Phloodpants
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The grey shadow is meant to show where the bridge rectifier mounts flat to the bottom of the chassis. The leads will be bent 90 degrees up in to the board.
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Old 22nd January 2017, 04:15 AM   #13
ammel68 is offline ammel68  United States
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Critique my capacitor board for Adcom GFA-535/545
Quote:
Originally Posted by Phloodpants View Post
OK, I think this is better...
Really? That looks like one bad Eagle layout. We all have to start somewhere though.

I've got several 535II's and they all have vertical 4 lead rectifiers on top of the capacitor boards. There are no bent leads that you're referring to.

Why don't you copy the factory board as close as possible?

What are you trying to improve upon with your own board?
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Old 22nd January 2017, 04:46 AM   #14
ammel68 is offline ammel68  United States
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Critique my capacitor board for Adcom GFA-535/545
Just visited your site phloodpants.

You describe the board pictured below as having "plated through-holes".
It looks to me like the pads are ONLY on the bottom layer, instead of being on the top and bottom layers like shown in this image:
https://cdn.sparkfun.com/assets/b/2/...8655000000.jpg

In the end and when all the dust settles, it's all about keeping those good ole' Adcom amps. alive.
Keep up the great work!
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Old 22nd January 2017, 11:53 PM   #15
Phloodpants is offline Phloodpants
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Thanks, yes actually my GFA-565 boards do have plated through-holes; they just don't have pads on top. There is a metal tube in each hole. This is a more solid and physically strong connection than the original boards that were just ordinary single-side boards.

Quote:
Originally Posted by ammel68 View Post
Just visited your site phloodpants.

You describe the board pictured below as having "plated through-holes".
It looks to me like the pads are ONLY on the bottom layer, instead of being on the top and bottom layers like shown in this image:
https://cdn.sparkfun.com/assets/b/2/...8655000000.jpg

In the end and when all the dust settles, it's all about keeping those good ole' Adcom amps. alive.
Keep up the great work!
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Old 23rd January 2017, 12:01 AM   #16
Phloodpants is offline Phloodpants
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Quote:
Originally Posted by ammel68 View Post
Really? That looks like one bad Eagle layout. We all have to start somewhere though.

I've got several 535II's and they all have vertical 4 lead rectifiers on top of the capacitor boards. There are no bent leads that you're referring to.

Why don't you copy the factory board as close as possible?

What are you trying to improve upon with your own board?
What makes it a bad layout? Be specific.

There are several reasons for me doing this, as outlined in the original post.
1. To fit larger drain resistors and bypass capacitors.
2. To add a snubber cap across the AC terminals of the bridge
3. I want to mount the bridge rectifier to the chassis for better cooling. That is why I am bending the leads.
4. They don't make 22mm lead-spacing capacitors anymore.
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Old 23rd January 2017, 03:58 AM   #17
ammel68 is offline ammel68  United States
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Critique my capacitor board for Adcom GFA-535/545
Quote:
Originally Posted by Phloodpants View Post
Thanks, yes actually my GFA-565 boards do have plated through-holes; they just don't have pads on top. There is a metal tube in each hole. This is a more solid and physically strong connection than the original boards that were just ordinary single-side boards.
If your boards don't have the pads on top as well as the bottom for axial leaded components, then it's not the same.
Perhaps in your eyes, if those "metal tubes" makes a big difference, that's all that matters.
All boards I lay out have pads on both sides for a truly "more solid and physically strong connection" for all axial leaded parts.
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Old 23rd January 2017, 04:17 AM   #18
ammel68 is offline ammel68  United States
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Critique my capacitor board for Adcom GFA-535/545
Quote:
Originally Posted by Phloodpants View Post
What makes it a bad layout? Be specific.
"Looks" is the key word in my post. Hey, if you think your layout looks great and will work great, that's all that matters.

3. If you've determined that the factory rectifiers are crap, run hot and just not up to the job, why not just get some KBPC5010 50A 1KV jobs and "bolt them to the chassis"? No lead bending required. Be sure and run some 10awg OFC wire to them.
That ought to "Get-R-Done"!
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