Well, was interesting. I have not even tried to use any caps after 338’s other than 3875’s local caps. Unfortunately, I don’t have these regs working at the moment so can not check it.
Does it get better than that? Heh, yes I’d say.
While I can concur with that the simpler non-f/b supply from my page showing regulated GC supplies sounds rather different than better than LM338 (though I am honestly leaning toward it), that second non-f/b supply is better.
Pedja
Does it get better than that? Heh, yes I’d say.
While I can concur with that the simpler non-f/b supply from my page showing regulated GC supplies sounds rather different than better than LM338 (though I am honestly leaning toward it), that second non-f/b supply is better.Pedja
Listening to good music 'till 2 AM...
A good test for transient speed, harmonics, treble detail, dynamics is two vinyl LPs I have from Keith Jarrett (they are called "Volume 1" and "Volume 2").
Very good ECM pressings, as always.
This amp is impressive to say the least.
Even with a much weaker trafo (compared to the big toroid I have on the URGC) salvaged from an old amp.
I can take the conclusion that with these chips and an unregulated PSU you always have a compromise: between 1,000uf and 1,500uf capacitance is the ideal on a sonic point of view (I made tests), but of course it's always a compromize.
With a regulated PSU you can have much more capacitance BEFORE the regs, and it pays off.
If only I could send you all the sound of this thing...
A good test for transient speed, harmonics, treble detail, dynamics is two vinyl LPs I have from Keith Jarrett (they are called "Volume 1" and "Volume 2").
Very good ECM pressings, as always.
This amp is impressive to say the least.
Even with a much weaker trafo (compared to the big toroid I have on the URGC) salvaged from an old amp.
I can take the conclusion that with these chips and an unregulated PSU you always have a compromise: between 1,000uf and 1,500uf capacitance is the ideal on a sonic point of view (I made tests), but of course it's always a compromize.
With a regulated PSU you can have much more capacitance BEFORE the regs, and it pays off.
If only I could send you all the sound of this thing...
Nuuk said:
Not quite Carlos, several people to my knowledge have tried regulated supplies!
And they don't say anything?
Or it may be a case of not doing it the best way, as this thing is picky with capacitance after the regs.
Nuuk said:
I'm still working on my case.
Much listening to do before that.
The case is the last thing I do.
I try the amps without the case, with test wires, connectors, heatsinks.
It's all prepared for R&D.
I can dismantle the whole thing in seconds, change a component and test again.
Forget the case for now or you may find out too late that you made some unnecessary holes
.i did mention this along time ago......
as a side note - a few weeks ago i bought a krell fpb300, this amp also have a regulated supply for the output powersection, its a rather big and powerfull amp.
i haven't listened to it yet because its a 115 volt/60hz and the voltage conversion takes a bit longer time than i expected, 8 - 10 days and i hope its ready........almost can't wait to be blown away....
Carlos, I am currently listening to the OPA627 buffered IGC that I built some time last year and it is still on a plank of wood!
The new amp is partly the result of my R&D with that GC and now I want to get it in a case rather than having another plank of wood in my rack for the next nine months?
I am using the modular design that I used for the VBIGC and (hopefully) any mods will be easy to do by removing the appropriate module.
I decided sometime ago to make this a pleasurable hobby again rather than be a slave to time schedules. This is easier to do of course when you already have a good system to listen to although that is not to say that I am not keen to hear the regulated PSU and new buffers!
'The ox is slow but the earth is patient'
The new amp is partly the result of my R&D with that GC and now I want to get it in a case rather than having another plank of wood in my rack for the next nine months?
I am using the modular design that I used for the VBIGC and (hopefully) any mods will be easy to do by removing the appropriate module.
I decided sometime ago to make this a pleasurable hobby again rather than be a slave to time schedules. This is easier to do of course when you already have a good system to listen to although that is not to say that I am not keen to hear the regulated PSU and new buffers!
'The ox is slow but the earth is patient'
tbla said:only the two top of the line models (33, 33h) have regulated powersupply for the output stages.......
So we're getting to/surpassing THAT level.
tbla said:but one area will not be surpassed - loudness, my speakers need much more power than delivered by a gainclone......
Regulated bridge/parallel LM3886?
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