An overkill power supply?

[raveon]

Hi there.

I'm new at this forum - but I've been reading a lot lately about The Bugle Phono-amp. I have a few opamp riaa's lying around, but I never took the time to build a decent power supply.
But now it's gonna be. I have a 500 watt (2x20 volt) toroid that I have decided to use.

So the question is:

Does anyone out there now of a low noise/low impedance power supply - preferably with shunt regulation. It has to supply the riaa-amp and a line amp.

regards

[pkpickard]

...which has professional qualilty PCBs built and is even on "special"

http://home.swipnet.se/~w-50719/hifi/qsxps/index.html

I have no affiliation, just a happy customer.

[peranders]

Let me correct you a little. The regulator is SERIES regulator with a shunt regulator as the voltage reference. The whole design is know in some circles as "Sulzer regulator" altough I had no knowledge about this guy until recently and my design is totally my own which I made 19 years ago. A case of parallel thinking I suppose.

You have more regulators to choose from.

Have you checked the "**** Super Regulator"? 2 and a half designs are available at the moment. Two hole mounted designs from ALW and aos and a coming from me, a SMD version.

http://www.alw.audio.dsl.pipex.com/jung_schematic.htm
http://members.shaw.ca/aoselco/aos/jungsrpcb.html
Sjöström Super Regulator group buy

http://www.diyaudio.com/forums/attac...&postid=246231
http://brian.prohosting.com/reg/jung-pcb-top.gif No pcb's available but nice looking.

I hope this will be some food for the thought.

[raveon]

Thank You pkpickard.

It seems that this was just what was lookin' for.

kindest regards

per

By the way, has anyone experienced this phenonemon:

I transferred an old LP to cd (CoolEdit & EAC), a couple of years later I bought the CD - Digitally Remastered, and all that kind of stuff - and almost by accident I came to close-listen the two versions. And you know what: the new and remastered version is absolutely **** - there is no atmosphere, room, warmth etc.

Isn't that funny?

[peranders]

Originally posted by raveon
Isn't that funny?

Not at the least

Too often you don't have a good master tape and on top of it you have a sound engineer which have some hearing problems.

Steeleyes Span "Commoners Crown" sound absolutely horrible! This CD hasn't lost it's atmosphere, they have made something I don't know, changed mixing or something. On vinyl it sound quite alright.

[Christer]

Originally posted by raveon

I transferred an old LP to cd (CoolEdit & EAC), a couple of years later I bought the CD - Digitally Remastered, and all that kind of stuff - and almost by accident I came to close-listen the two versions. And you know what: the new and remastered version is absolutely **** - there is no atmosphere, room, warmth etc.

Isn't that funny?

No, it is the sad truth that remasterings differ a lot and are
often crap. Some labels seem to get it worse for every
new remastering they do, other seem to learn. I could tell
you long stories about such differences between different
remasterings, either on different labels or even on the same one.
I recently bought a new version of an old favourite, claimed to
be in much improved sound. It was so terrible I couldn't bear
listening to it.

BTW, are you seriously considering a 500 VA transformer for
a phono amp??? Hm, well at least you won't run out of current
I guess.

[raveon]

No, it is the sad truth that remasterings differ a lot and are

Okay! So it's not me that can't hear anymore. The LP I referred to was an old Buddy Holly (mono). I love r&r from the 50's and 60's - and a lot of other things too. The Remastered version is in STEREO!!!
The LP is from 1958 - when stereo was a brand new thing.
So much for high fidelity!

Yeah. I know the 500 watt is as bit too far, but is has been lying around for several years now. Its to small - in voltage - to run a decent power amp, so I thought I would just give it a try with a riaa+linestage.

regards

Per Flintholm

[raveon]

Hi again

I just found this on the following site:

http://www.tnt-audio.com/clinica/indiscreet.html

It would need a bit of recalculation to get +-15 volt out, and it is for sure more simple than per-anders' super-supply.

But is it any good?

regards

[gwolf]

Yeah. I know the 500 watt is as bit too far, but is has been lying around for several years now. Its to small - in voltage - to run a decent power amp, so I thought I would just give it a try with a riaa+linestage.

What about a single power supply with some 50V and a bridged design? With this you can have decent 300W @ 4 Ohms. I think you can find such designs in the Pass Labs forum.

Cheers,

Gerhard

[Christer]

Originally posted by raveon
Okay! So it's not me that can't hear anymore. The LP I referred to was an old Buddy Holly (mono). I love r&r from the 50's and 60's - and a lot of other things too. The Remastered version is in STEREO!!!
The LP is from 1958 - when stereo was a brand new thing.
So much for high fidelity!

Actually, many companys started to do recordings in stereo
much earlier, but they were usually never released as stereo,
mainly for the lack of an LP stereo standard until 1958 (?).
The earliest stereo recording I know of is a german war-time
recording with Gieseking from 1945, but that must be considered
an exception. However, if there hadn't been a war intereferring,
I suppose many more stereo recordings would have followed.
The first big stereo efforts seem to be those by RCA and
Decca which both started to do stereo recordings in 1954/55
as advance experiments. Others like EMI soon followed, although
I think EMI (and maybe the other too) recorded in both stereo
and mono on different tape recorders, since the stereo recordings
were only experiments. Many of these recordings never appeared
in stereo at all until the CD era. Apart from recordings, stereo
transfers were done earlier. There was a US experiment in the
early 1930's, doing a live three-channel transfer over phone
lines from a live concert in one city to a concert hall with speakers
in another city. Even earlier, already in the 19'th century there
were some kind of stereo telephone receivers in booths in Paris
where you could insert a coind and listen to the Paris Opera
performances.

If you are interested in the remastering issues. Try to get hold
of different remasterings of the same recording and you will
likely get surprised. I listen a lot to historical classical recordings,
and there are quite big differences in some cases. Many recordings
were surprisingly good already around 1930, but in many cases
the sound has been too corrupted by bad remasterings.

Yeah. I know the 500 watt is as bit too far, but is has been lying around for several years now. Its to small - in voltage - to run a decent power amp, so I thought I would just give it a try with a riaa+linestage.

OK, I was about to suggest you buy a smaller trafo for this project
and save the big one for a power amp, but realize now why you
don't do that. I should have thought of that anyway.