Salas hotrodded blue DCB1 build - Page 62 - diyAudio
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Old 11th November 2010, 06:22 PM   #611
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Salas,

This is my first build so please bear with me. I'm a little confused with what I'm seeing printed on the board relative to the BOM. I see mur820 on the board but no mention of these rectifiers in the BOM. Is this the location on the board where I use the recommended mur840's for the 'stage 1' build?
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Old 11th November 2010, 06:46 PM   #612
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Yes, there (at the edge of the board) is where the bigger TO-220 style diodes go. The BOM lists MUR840 or MUR860, which are higher voltage versions of the MUR820.
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Old 11th November 2010, 06:56 PM   #613
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Quote:
Originally Posted by Rodeodave View Post
Yes, there (at the edge of the board) is where the bigger TO-220 style diodes go. The BOM lists MUR840 or MUR860, which are higher voltage versions of the MUR820.
and importantly, higher current.
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Old 11th November 2010, 07:18 PM   #614
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Thanks guys.
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Old 11th November 2010, 07:25 PM   #615
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I think the 8 in MUR820 is for 8A and the 20 is for 200V. 40 is 400V and 60 is 600V.

The datasheet suggests that they benefit from a heatsink, but I doubt that it's an issue at currents needed for the DCB1...

http://www.datasheetcatalog.org/data...8ed5gzfe3y.pdf
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Old 12th November 2010, 03:31 PM   #616
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Sorry for the rudimentary questions. Is the higher voltage of the MUR860's going to be an issue if I'm hotrodding to 200mA? These were the only values I could find that weren't back ordered.
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Old 12th November 2010, 03:36 PM   #617
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Quote:
Originally Posted by knassiri View Post
Sorry for the rudimentary questions. Is the higher voltage of the MUR860's going to be an issue if I'm hotrodding to 200mA? These were the only values I could find that weren't back ordered.
It will be fine. They are just nice diodes. Lot of stuff uses them with low current.
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Old 12th November 2010, 08:25 PM   #618
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Great, thank you Tea-Bag. I went ahead and splurged for the naked Vishay's you referred to earlier in the thread. I ordered directly from Texas Components and was quoted a two week lead time. Curious to hear how the tx2575's compare to the Takman's that are in the board.

Last edited by knassiri; 12th November 2010 at 08:31 PM.
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Old 15th November 2010, 06:08 AM   #619
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Originally Posted by Tea-Bag View Post
It will be fine. They are just nice diodes. Lot of stuff uses them with low current.
I'm looking to hot-rodded the mesmerize board to 600mA with MUR820. I'm looking to mount MUR820 off-board a thick aluminum plate beneath the board. Would there be any noise or performance issue running wires between the diodes and board?
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Old 16th November 2010, 06:53 PM   #620
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Hey,

I got my caps mkp-1837, so I mount these in these in the 100uf position on the top and bottom.

Just double checking...

Thanks,
JG
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