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Old 10th January 2004, 07:38 PM   #1
elizard is offline elizard  Canada
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Default Rectifiers for the GC

Well, I'm planning to build the valve buffered inverted GC, so I'm making up my component list now. I got to the bridge rectifiers and got to thinking.

Right now i have an inverted gc, and i'm using two bridges, each made of 4 mur1520. Now, I know that peter likes the mur860s quite a bit, and there's a whole following behind it.

So before I build the bridges with the mur860 diodes, what is the general consensus on bridge rectifiers that are pre-made (i.e. instead of using 4 diodes, use the ready made bridge)? The only reference I could find (withouth spending hours looking) is on nuuk's website, but its not very explanatory. Any thoughts on whether i should just stick to 860s, or give the bridge a try.

(I know, experimentation is the key, however i'm low on money, so experimentation for now is out of reach .. even if it may be the purchase of extra several diodes which would be under $20, i'd still prefer to keep the extraneous costs down at this time).
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Old 10th January 2004, 07:47 PM   #2
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If you check the "Patek ripoff" thread, you'll notice that the guy likes regular bridges over MUR860.

You can also order MUR860 as samples from OnSemi, many people did.

I never tried regular bridges in GC, so can't comment.
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Old 10th January 2004, 10:20 PM   #3
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Use normal bridge such as KBU 8 J - fast diodes are unnecessary - you are not doing switching supply .
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Old 10th January 2004, 10:46 PM   #4
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Anybody got a specific recommendation for a bridge that has leads that are the 1/4" plate types? (not pins)

I know this usually only comes on the heaviest duty bridges, but I have an idea that I am working on.

Would there be any switching speed disadvantage to using a heavier-than-needed-duty bridge?

TIA

GnD
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Old 10th January 2004, 10:53 PM   #5
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Why you guys prefer to talk about speed and not about the sound? Who in the right mind cares for speed?
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Old 10th January 2004, 10:58 PM   #6
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Quote:
Originally posted by Peter Daniel
Why you guys prefer to talk about speed and not about the sound? Who in the right mind cares for speed?
So, how come you use ultrafast diodes like MUR860 and
haven't even tried ordinary bridges?
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Old 10th January 2004, 11:44 PM   #7
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Quote:
Originally posted by Christer


So, how come you use ultrafast diodes like MUR860 and
haven't even tried ordinary bridges?
I thought listening to ordinary bridges would be a waste of time.

I also tried MSR860, which supposedly are soft recovery type, and in a long run I didn't like them, too bright.
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Old 11th January 2004, 12:23 AM   #8
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If you search through several threads on this subject, IMO, it comes down to the sound you like. ie: you need to try various types and decide yourself which sounds the best to you.
This is an area where there is no clear cut answer, one reason may be various users are using different xfmrs/Mains input circuits, which would effect the final output dynamics of the amp in question.
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Old 11th January 2004, 12:35 AM   #9
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Hi,

Quote:
If you search through several threads on this subject, IMO, it comes down to the sound you like. ie: you need to try various types and decide yourself which sounds the best to you.
And no one ever thought about using tube rectifers for this?

Pretty amazing if you'd ask me...

Cheers,
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Old 11th January 2004, 04:39 AM   #10
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Hey~! tube rectifiers are kinda cool..but they carry so little current...and the big voltage drop...so it's not easy to implement....
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