We are reporting VERY good results with the LM338 and LT1083.
You can test other regs, it's up to you, if you don't believe the hype...😀
I'd rather spend 4€ on each reg than have inferior parts for free, the PSU takes some work to do, you know?
You can test other regs, it's up to you, if you don't believe the hype...😀
I'd rather spend 4€ on each reg than have inferior parts for free, the PSU takes some work to do, you know?
Yes, I know what you are saying 🙂
Just that I finally got my act together and mail ordered all the parts required for my 4 channel gainclone and active crossover when I read this thread with regulated power supply
Another question, I am running a pair of Brian's premium kits at the moment with 1000uF Black Gates, I don't feel like spending the money required to buy 8 4700uF Black Gates for the regulated supply (or 16 for 4 channel!). Is the circuit critical of the quality of the capacitors between the transformer and the regulator? I would like to buy low price here if it makes little difference and get high quality for the rest.
Thanks,
Chris
Just that I finally got my act together and mail ordered all the parts required for my 4 channel gainclone and active crossover when I read this thread with regulated power supply
Another question, I am running a pair of Brian's premium kits at the moment with 1000uF Black Gates, I don't feel like spending the money required to buy 8 4700uF Black Gates for the regulated supply (or 16 for 4 channel!). Is the circuit critical of the quality of the capacitors between the transformer and the regulator? I would like to buy low price here if it makes little difference and get high quality for the rest.
Thanks,
Chris
Chris, good news: it's not critical the caps before the regulator.
You can use normal caps there (well... except those ultra-cheap light green cheapies😀 ) and bypass with 0.1~0.47uf polyester caps.
It's what I've done.🙂
The influence of the quality of the caps before the reg are not nearly as big as on the unregulated PSU/GC.
You can use normal caps there (well... except those ultra-cheap light green cheapies😀 ) and bypass with 0.1~0.47uf polyester caps.
It's what I've done.🙂
The influence of the quality of the caps before the reg are not nearly as big as on the unregulated PSU/GC.
if you are going to regulate a GC -- take a look at this baby from Power-One
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=32720&item=3821319758&rd=1
PWER is a major supplier of power supplies to Cisco, Lucent, Nortel, etc. Mostly they make switchers.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=32720&item=3821319758&rd=1
PWER is a major supplier of power supplies to Cisco, Lucent, Nortel, etc. Mostly they make switchers.
Re: Re: High-End Regulated Buffered Inverted GC
It's not a joke, it's actually quite a nice compromise. These chip amplifiers do sound good, and the measurements stand up well to criticism.
With respect to regulation -- the LM3875 and LM3886 have PSRR of 120dB -- there is no need to regulate the power supply -- what Carlos should do if he believes so firmly that regulation is necessary is to build the DC measurement test jig shown in illustration 1 of the LM3875 datasheet -- then measure the PSRR with and without regulation.
One of the reasons that Nelson regulated one of his Audio Amateur designs (must have been 1991 or 1993) was the poor PSRR.
Microchip_Usa said:
It's not a joke, it's actually quite a nice compromise. These chip amplifiers do sound good, and the measurements stand up well to criticism.
With respect to regulation -- the LM3875 and LM3886 have PSRR of 120dB -- there is no need to regulate the power supply -- what Carlos should do if he believes so firmly that regulation is necessary is to build the DC measurement test jig shown in illustration 1 of the LM3875 datasheet -- then measure the PSRR with and without regulation.
One of the reasons that Nelson regulated one of his Audio Amateur designs (must have been 1991 or 1993) was the poor PSRR.
Re: Re: Re: Re: High-End Regulated Buffered Inverted GC
I've built at least 5 Zen amps. To me they are more complicated designs that chip amps.
Also, I prefer the sound of chip amp to the sound of Zen. I sold all my Zen amps.
I have also built Aleph X amp and I still prefer to use chip amp as it sounds better to me.
The truth is, I didn't tweaked my Aleph X as much as I tweaked the chip amp and Aleph hasn't got red solder mask😉
I believe that both of those amps, (Aleph and chip amp), when properly set up and tweaked, may deliver very satisfying listening experience. I can't say which one is better, as it depends on many other factors.
I hope that SOZ might be better than chip amp. I will be building one soon😉
Microchip_Usa said:
Microchip_Usa said:
I've built at least 5 Zen amps. To me they are more complicated designs that chip amps.
Also, I prefer the sound of chip amp to the sound of Zen. I sold all my Zen amps.
I have also built Aleph X amp and I still prefer to use chip amp as it sounds better to me.
The truth is, I didn't tweaked my Aleph X as much as I tweaked the chip amp and Aleph hasn't got red solder mask😉
I believe that both of those amps, (Aleph and chip amp), when properly set up and tweaked, may deliver very satisfying listening experience. I can't say which one is better, as it depends on many other factors.
I hope that SOZ might be better than chip amp. I will be building one soon😉
Re: Re: Re: Re: Re: High-End Regulated Buffered Inverted GC
What about trying a highly tweaked X-SOZ?
--
Brian
Peter Daniel said:
What about trying a highly tweaked X-SOZ?
--
Brian
I might try it too, but first i would be tempted with a regular SOZ.
There are many stories of improved circuits, but usually the simplest ones do sound the best😉
There are many stories of improved circuits, but usually the simplest ones do sound the best😉
Re: Re: Re: High-End Regulated Buffered Inverted GC
No measurements, just my ears.
If you read this thread carefully and the other one (link on the first post), you'll understand why.
It's not a question of PSRR at all.
It's a question of stable voltage, and also because these chips sound good with only 1000 to 1500uf capacitance on the (unregulated) PSU.
I think that you understand that this is a huge limitation for a 50 watt amp.
If you increase capacitance you muck up the sound, if you regulate...
I'm the one that always tell people to don't banalize the word high-end.
I only use it when I LISTEN to something special.
This is one of those things.😉
jackinnj said:
No measurements, just my ears.
If you read this thread carefully and the other one (link on the first post), you'll understand why.
It's not a question of PSRR at all.
It's a question of stable voltage, and also because these chips sound good with only 1000 to 1500uf capacitance on the (unregulated) PSU.
I think that you understand that this is a huge limitation for a 50 watt amp.
If you increase capacitance you muck up the sound, if you regulate...
I'm the one that always tell people to don't banalize the word high-end.
I only use it when I LISTEN to something special.
This is one of those things.😉
Re: Re: Re: Re: Re: Re: High-End Regulated Buffered Inverted GC
It seems like it's based on two regular Alephs😉 It's the latest commercial offering from PassLabs.Microchip_Usa said:
In simple terms the alpha-X Is a cross-coupled version of a bridged amp using the alpha as a base.
Chip better than ZEN or ALEPH
Peter,
That very funny, a chip amp is better than a ZEN or ALEPH, your quite the joker.
Peter,
That very funny, a chip amp is better than a ZEN or ALEPH, your quite the joker.
Re: Chip better than ZEN or ALEPH
Unless you tried them all, you'll be a joker too😉
To be precise, I'm not saying they better. I'm merely sayin' I like it better. There is a difference in that.
jewilson said:Peter,
That very funny, a chip amp is better than a ZEN or ALEPH, your quite the joker.
Unless you tried them all, you'll be a joker too😉
To be precise, I'm not saying they better. I'm merely sayin' I like it better. There is a difference in that.
I may become a joker too
When I compare my GC I was using normal 2 channel system and compare it with my 4 JLH2003 bi-amp system. I prefer the JLHs system. But time will tell, for now I have 4 channel GC and I can really compare orange and lemon within the same system. My guess is that I may still prefer the JLHs may be because I am biased; but the GC are very very special indeed even when it was used with a pair of old B&W speakers. There is something about it that when I thought GC may emphasize certain critical range of sound, but with careful listening everything are still there. It is hard to describle especially with classical recordings. Unfortunately I have only myself to judge and compare the two camps of amps for the next couple of weeks. Class A and GC with similar output power in a bi-amp system, try to keep other things constant. Will see I am a joker or not?😉
Regards,
Chris
When I compare my GC I was using normal 2 channel system and compare it with my 4 JLH2003 bi-amp system. I prefer the JLHs system. But time will tell, for now I have 4 channel GC and I can really compare orange and lemon within the same system. My guess is that I may still prefer the JLHs may be because I am biased; but the GC are very very special indeed even when it was used with a pair of old B&W speakers. There is something about it that when I thought GC may emphasize certain critical range of sound, but with careful listening everything are still there. It is hard to describle especially with classical recordings. Unfortunately I have only myself to judge and compare the two camps of amps for the next couple of weeks. Class A and GC with similar output power in a bi-amp system, try to keep other things constant. Will see I am a joker or not?😉
Regards,
Chris
To Peter Daniel : Be brave Peter in this crowd of deaf 😉 - realy is not problem to build amp, which is better than Zen 
, but talking about this is sometimes like calling on desert 😎 .
, but talking about this is sometimes like calling on desert 😎 .
Upupa,
Would you mind if i use these words as my signature? I also happen to be a Peter 🙂 and a sucker for poetry.
Guys, what's wrong in preferring the sound of the GC to a "high-end-class-A" amp?
If the world is full of preconceptions and people like this the Gaincard would never exist.
Thank god there are open-minded people.
LISTEN and judge, compare, don't talk without knowing, don't talk theory.
For that, we have the magazines.
BTW there are no two equal GC, I thought everybody understands this.
Anyway, what I'm up to now I don't even know if I may call it a GC, this is something quite different.
Even my amps is different from the "NIGC" norm, I've gos to the conclusion long ago, after making too many amps, that the best implementation is this one.
The regulated PSU just takes it to another level.😉
If the world is full of preconceptions and people like this the Gaincard would never exist.
Thank god there are open-minded people.
LISTEN and judge, compare, don't talk without knowing, don't talk theory.
For that, we have the magazines.
BTW there are no two equal GC, I thought everybody understands this.
Anyway, what I'm up to now I don't even know if I may call it a GC, this is something quite different.
Even my amps is different from the "NIGC" norm, I've gos to the conclusion long ago, after making too many amps, that the best implementation is this one.
The regulated PSU just takes it to another level.😉
On the other hand Carlos, you can hardly say that the chipamp is better than EVERY discrete class A amp 😉
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