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Old 10th November 2012, 12:14 PM   #51
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Dear Holger,
would you mind to implement some Fuses ?
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Old 10th November 2012, 12:17 PM   #52
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Cool. And pretty universal. Maybe you could add a few Holes in different spacings for Caps & Diodes. But i see that this would lead to loosing Eurocard size maybe which is strongly undesired.

Another point: would it make sense to add a board for the High-Volt side with softstart, dc-removal, fusing comparable to what Dragan did in his Supplys for the ono?

Mike
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Old 10th November 2012, 12:23 PM   #53
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If you move the Input Connectors to the corners, you could probably gain enough space to move the Coils more to the left to gain a little space where the caps & Diodes are ?

Mike
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Old 10th November 2012, 02:05 PM   #54
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Quote:
... implement some Fuses ?
Maybe not a bad idea :rolleyes.
Quote:
... add a few Holes in different spacings for Caps & Diodes
Absolutely. Mounting TO220 diodes should be possible.
Quote:
f you move the Input Connectors to the corners...
You are right, but that would consume the space needed for the mounting holes.
Quote:
to add a board for the High-Volt side with softstart, dc-removal...
Soft start? Hardly needed here. DC removal? Negotiable .
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Old 10th November 2012, 02:13 PM   #55
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DC removal belongs before the transformer but that is only a problem with some toroids.
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Old 10th November 2012, 02:41 PM   #56
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Thank you guys,

I appreciate your work on this project very much!

Just a newbie question to the chokes (B82724a),
they also have a vertical B82724j model with a smaller
footprint.
Will it work? If so, some room could be saved for
the fuse?

Christoph
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Old 10th November 2012, 03:17 PM   #57
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There are other common mode chokes ( also from Panasonic ) that will work. Some prefer vertical. I always use the same Talema chokes but i do not see a reason why another choke would not work as well.
Holger may not be able to make a PCB that contains all options though. On the other hand the Talema is cheep and works.
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Old 10th November 2012, 03:26 PM   #58
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cheepness
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Old 10th November 2012, 03:58 PM   #59
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Reichelt only stocks the flat type, so I stuck to that one. But it won't be a problem to add pads for the vertical type as well.
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Old 14th November 2012, 01:08 AM   #60
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Here are some R-Core transformers :
Audio Catalog
I would say the most economical solution is to use Block split bobbin transformers with 2 x 15V . 4 of this transformers can be combined for 2 x 2 x 30V AC.
I think 30V is optimum and 28V is minimum if we want to use the 40 Ohm Hammond coils.
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