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).
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).
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.
You can also order MUR860 as samples from OnSemi, many people did.
I never tried regular bridges in GC, so can't comment.
Use normal bridge such as KBU 8 J - fast diodes are unnecessary - you are not doing switching supply 😎 .
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
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
Why you guys prefer to talk about speed and not about the sound? Who in the right mind cares for speed?
Peter Daniel said:
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.Christer said:
I also tried MSR860, which supposedly are soft recovery type, and in a long run I didn't like them, too bright.
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.
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.
Hi,
And no one ever thought about using tube rectifers for this?
Pretty amazing if you'd ask me...
Cheers,😉
And no one ever thought about using tube rectifers for this?
Pretty amazing if you'd ask me...
Cheers,😉
Hey~! tube rectifiers are kinda cool..but they carry so little current...and the big voltage drop...so it's not easy to implement....
Peter Daniel said:
i can't seem to find the patek ripoff thread, care to point me the right way?
FinalLabs offeres very "sofisticated" tube rectifier psus as the only alternative to their dry cell battery approach. The claim that no other psu is that quiet.
Klaus
Klaus
elizard said:
I would 2nd the view that it is a waste to use those ultra-fast types: most of them are engineered to be used as freewheeling diodes in smps. and I just cannot think of a reason those fast diodes can help. I suspect that some people use them because they sound fancy and are expensive.
I use normal gbu8 in my gainclones. They cost like <50 cents each and can take some serious abuses (like 100 or 200amp peak current ratings).
To be fair, I also tried some shottky types (mur860 and 2010 and a few fairchild types). I cannot say that I heard a difference.
If you are tight on money, you can go with the bridge for now and see if you can upgrade in the future.
Peter Daniel said:
Peter,
Do you use an ac filter in your new gainclones?
I think I saw one on some of your latest pictures
Peter Daniel said:
that's indeed true. After all, it is only human to err. and I am not pretending to play God as some of us are.
Peter Daniel said:
yeah. I am sure all those marketing literatures should be published in Nature, and cherished and held true as Einstein's relativity theory.
and I am sure all of our golden ear friends can hear a mr860 from a 1n4007, 🙂
Bricolo said:
I tried that type of filter in a GC, but didn't like the results. The sound became grey and lost dynamics. From my experience I wouldn't recommend those type of devices in power amps.
AC filter works great in digital circuits, especially DACs and I still don't know what difference it makes in a preamp.
Golden ears? Even the half deaf would hear it. Have you been exaggerating your hearing abilities? 🙂
More seriously i recently used an old power supply and was surprised it sounded better than the MUR860 feeding a preamp circuit. It turned out to use BYW95C - far from ultrafast at 250nS. In the preamp it sounded much more dynamic than the MUR without being harsh. Still haven't tried it in the GC.
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