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Old 8th May 2003, 06:57 PM   #1
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Default custom made soft bridges

I was thinking of making my own bridges out of the fast recovery diodes (which ones, I don't know... any suggestions?). Has anyone tried to make their own bridge packs by potting them so they can be easily heatsink mounted? Anyone have a good idea how to heat sink these diodes?
Steve
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Old 8th May 2003, 07:09 PM   #2
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http://www.diyaudio.com/forums/showt...1375#post61375
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Old 8th May 2003, 07:11 PM   #3
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I gave this some thought a while ago. For axial leaded diodes you might consider drilling four holes through a rectangular piece of copper bar stock. Just large enough to guarantee that the diodes will be potted without any voids. Be sure to also drill and tap (at least) two holes for mounting it. As for the adhesive, JB Weld can handle the temperature, but I'm sure there are more thermally conductive options available. FWIW, there are diodes in TO-220 packages too.
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Old 8th May 2003, 07:17 PM   #4
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Default UG10DCT

The UG10DCT from General Semiconductor, available from Mouser Electronics, works well. There are 2 diodes in each to220 package and a bridge can be made with 3 parts.

George
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Old 8th May 2003, 07:18 PM   #5
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Lightbulb Re: custom made soft bridges

Quote:
Originally posted by nobody special
I was thinking of making my own bridges out of the fast recovery diodes (which ones, I don't know... any suggestions?). Has anyone tried to make their own bridge packs by potting them so they can be easily heatsink mounted? Anyone have a good idea how to heat sink these diodes?
Steve
Hi Steve,
I was thinking about something like this with for MSR1560 for my Ampzilla:
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Old 8th May 2003, 07:36 PM   #6
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All good ideas! Thanks!
I really like the idea with the copper bar stock. Anyone have any ideas about which diodes to use, and what package they come in?
Thanks for the link, Peter. Sorry for the redundant posting.
Steve
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Old 8th May 2003, 08:42 PM   #7
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Question Heatsinking diodes

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Originally posted by nobody special
All good ideas! Thanks!
I really like the idea with the copper bar stock. Anyone have any ideas about which diodes to use, and what package they come in?
Thanks for the link, Peter. Sorry for the redundant posting.
Steve
Hi Peter,
Why do you think the diodes get so hot they need so much heatsinking?
Links to other diodes in the high speed diode thread. F.a. MSR 860. MSR 860 & MSR1560 are both TO-220 case.
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Old 8th May 2003, 08:45 PM   #8
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Why do you think the diodes get so hot they need so much heatsinking?
They will be going into an Aleph with a bias current of 5A... I have heard that they can fail if you don't give them some heatsinking. You don't think it's necessary?
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Old 8th May 2003, 08:49 PM   #9
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Smile Heatsinking diodes

Quote:
Originally posted by nobody special


They will be going into an Aleph with a bias current of 5A... I have heard that they can fail if you don't give them some heatsinking. You don't think it's necessary?

No you are right, I am always thinking class AB as I am using this type of amplifier(s) more then 25 years.
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Old 9th May 2003, 12:35 PM   #10
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No you are right, I am always thinking class AB as I am using this type of amplifier(s) more then 25 years.
Ahhh... one of the sane ones who dosen't combine their central heating and audio
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