"Oddjob" wrote in message
...
On 07/03/2010 20:28, Arny Krueger wrote:

Have you read his heresy opinions:

http://www.lampizator.eu/HERESY/heresy.html

I thought no.7 was interesting. Is he comparing performance sound pressure
waves with amplifier outputs?

I don't see any helpful wisdom there.

"Trevor Wilson" wrote in message
...

"Arny Krueger" wrote in message
...

"Oddjob" wrote in message
...

Hello everyone, I after the above chip from 1990-95

Does anybody know of a UK distributor likely to have old stock?

Many thanks

Why bother?

DAC chip technology has moved on since then.

**Typical American attitude. If it's broken, chuck it out, regardless of
the inherent quality of the device.

Misses the point that the inherent quality of the TDA1541 is relatively poor
by modern standards. People don't make audio DACs that way any more, and
there are very many good reasons for it. I can understand a person who
simply wants to get a quality legacy piece back into operation with minmal
hassle. My comments were intended for retro-technology freaks who scour the
world for this chip to the exclusion of all others for new equipment
construction, in their obsessive pursuit of better sound. Because of their
self-defeating behavior, legitimate needs for maintenance become frustrated.

This all reminds me of an stereo receiver I once had that features an
elaborate stereo decoder, with many discrete transistors, diodes, coils and
capcitors that needed extensive adjustement after assembly and featured a
tricky manual nulling technique to optimize its adjustment for every
station. One day I pretty well cleared its part of the circuit card and
replaced it with a $3 chip that sounded oh, so much better and required no
manual adjustements at all once a single potentiometer was set. The essence
of the potentiometer setting was to adjust it until there was sound.

On Mon, 8 Mar 2010 07:16:58 -0500, "Arny Krueger"
wrote:


**Typical American attitude. If it's broken, chuck it out, regardless of
the inherent quality of the device.

Misses the point that the inherent quality of the TDA1541 is relatively poor
by modern standards. People don't make audio DACs that way any more, and
there are very many good reasons for it. I can understand a person who
simply wants to get a quality legacy piece back into operation with minmal
hassle. My comments were intended for retro-technology freaks who scour the
world for this chip to the exclusion of all others for new equipment
construction, in their obsessive pursuit of better sound.

What gave you the impression that was why he was asking?

IS there a better, easily available, slot-in replacement for this
chip?

"Laurence Payne" wrote in message
...
On Mon, 8 Mar 2010 07:16:58 -0500, "Arny Krueger"
wrote:


**Typical American attitude. If it's broken, chuck it out, regardless of
the inherent quality of the device.

Misses the point that the inherent quality of the TDA1541 is relatively
poor
by modern standards. People don't make audio DACs that way any more, and
there are very many good reasons for it. I can understand a person who
simply wants to get a quality legacy piece back into operation with minmal
hassle. My comments were intended for retro-technology freaks who scour
the
world for this chip to the exclusion of all others for new equipment
construction, in their obsessive pursuit of better sound.

What gave you the impression that was why he was asking?

That's the usual context of questions like these.

There has been an amazing amount of worship of the TDA 1541 because it is
such a different technology than current (superior) practice.

IS there a better, easily available, slot-in replacement for this
chip?

Good question. If availibility remains a problem, someone who has the need
might want to do their homework.

Using a lower grade of the same chip would probably not cause any real world
problems and should be investigated first.

However, it would be acceptable to put the new works on a little piece of
circuit card and fly it on stilts over the existing converter chips. Both
the converter and reconstruction filters would need to be bypassed.

"Oddjob" wrote in message
...
On 07/03/2010 20:28, Arny Krueger wrote:
"David wrote in message
...
wrote in message
...
On 07/03/2010 15:11, Jim Lesurf wrote:
In , Don Pearce
wrote:
On Sun, 07 Mar 2010 09:34:52 +0000,

wrote:

On 07/03/2010 08:41, Jim Lesurf wrote:
In , Oddjob
wrote:
It is in my Meridian D600 speakers. It was distorting and making a
crackly noise :-(

Ask Meridian?

How do you know it is the DAC chip that is causing the problems?

Slainte,

Jim

If the chip is cooled it is okay - apply heat with soldering iron
and
it starts....

I'd remake all the solder joints before changing the chip.

I'd agree. Might easily be a poor solder connection. So if you are
keen
to
keep using the original spec DAC then remaking the connections with
care
is
worth trying.

Slainte,

Jim

I can get a TDA1541A easily enough. The silver crown will be a lot
harder
and more expensive....

This bloke has some interesting information about the Philips DAC:

http://www.lampizator.eu/lampizator/...r/TDA1541.html


That's not "information", that's opinion, (and in my opinion he's nuts).


A lot of what he says is a truism (true of any good DAC), and the rest is
wild speculation.

I can see the desire to use a pin-compatible replacement if this is for
fixing up something that is broken.


Have you read his heresy opinions:

http://www.lampizator.eu/HERESY/heresy.html

I thought no.7 was interesting. Is he comparing performance sound pressure
waves with amplifier outputs?

I think he should get out more.

Mike

Arny Krueger wrote:
"Trevor Wilson" wrote in message
...

"Arny Krueger" wrote in message
...

"Oddjob" wrote in message
...

Hello everyone, I after the above chip from 1990-95

Does anybody know of a UK distributor likely to have old stock?

Many thanks

Why bother?

DAC chip technology has moved on since then.

**Typical American attitude. If it's broken, chuck it out,
regardless of the inherent quality of the device.

Misses the point that the inherent quality of the TDA1541 is
relatively poor by modern standards.

**Irrelevant. Your claim, here and elsewhere, is that the TDA1541 is
'audibly perfect'. Therefore, given the inherent quality of the device being
repaired, it makes perfect sense to spend a reasonable amount to service it.
The American attitude, as typified by your comments, is to chuck it out,
rather than service it. That, in part, is what is wrong with our society
today.



--
Trevor Wilson
www.rageaudio.com.au

"Trevor Wilson" wrote in message
...
Arny Krueger wrote:
"Trevor Wilson" wrote in message
...

"Arny Krueger" wrote in message
...

"Oddjob" wrote in message
...

Hello everyone, I after the above chip from 1990-95

Does anybody know of a UK distributor likely to have old stock?

Many thanks

Why bother?

DAC chip technology has moved on since then.

**Typical American attitude. If it's broken, chuck it out,
regardless of the inherent quality of the device.

Misses the point that the inherent quality of the TDA1541 is
relatively poor by modern standards.

**Irrelevant. Your claim, here and elsewhere, is that the TDA1541 is
'audibly perfect'. Therefore, given the inherent quality of the device
being repaired, it makes perfect sense to spend a reasonable amount to
service it.

Well Trevor you're having so much fun picking a fight with yourself that I
hesitate to put an end to your fun and try to bring you back to reality.

No place did I suggest, even for a second, that the Meridian 600 speakers be
scrapped.


The American attitude, as typified by your comments, is to chuck it out,
rather than service it.

Interesting how an Aussie would be such an expert on American culture given
the distance and other differences.

That, in part, is what is wrong with our society today.

You would be wise to speak only for your own society, Trevor.

Trevor Wilson wrote:

**Typical American attitude. If it's broken, chuck it
out,
regardless of the inherent quality of the device.

Misses the point that the inherent quality of the TDA1541
is
relatively poor by modern standards.

**Irrelevant. Your claim, here and elsewhere, is that the
TDA1541 is 'audibly perfect'. Therefore, given the
inherent quality of the device being repaired, it makes
perfect sense to spend a reasonable amount to service it.
The American attitude, as typified by your comments, is to
chuck it out, rather than service it. That, in part, is
what is wrong with our society today.

Not for much longer, you'll be happy to know. It's an
attitude arising from low relative prices for consumer
goods.

Soon, Americans won't be the only people to find themselves
darning their socks. God knows what'll happen when all these
mobile phones start breaking down and no-one can afford new
ones.

Anyway, on your substantial point, how old is the currently
prevalent view that CD audio is as close to perfect as makes
no difference? Seems to me "improved" chips continue to
appear periodically, and some of these improvements are
presumably related to accuracy. So at what point in this
history did these improvements become indiscernable?

AFAIK, infatuation with the TDA1541 is because it's used in
equipment that sounds particularly good in the opinion of
some people. Chunky chip, too, which is handy for DIYers. I
guess those people would be prepared to accept that they may
not measure too well, but they don't care.

I wonder if Arny was here, at the time, to tell everone that
it really didn't matter, because in XYB tests no-one could
tell the difference.

Ian

Ian Iveson wrote:

Anyway, on your substantial point, how old is the currently
prevalent view that CD audio is as close to perfect as makes
no difference? Seems to me "improved" chips continue to
appear periodically, and some of these improvements are
presumably related to accuracy. So at what point in this
history did these improvements become indiscernable?

Sometime in the late eighties.

--
Eiron.

Trevor Wilson wrote:

**Irrelevant. Your claim, here and elsewhere, is that the TDA1541 is
'audibly perfect'. Therefore, given the inherent quality of the device being
repaired, it makes perfect sense to spend a reasonable amount to service it.
The American attitude, as typified by your comments, is to chuck it out,
rather than service it. That, in part, is what is wrong with our society
today.

It's always puzzled me why you write 'service' when you mean 'repair'.
Is that an Australian thing? Or a psychological trick to persuade the
punters
to spend more on a repair than it would cost to buy something newer and
better?
Over here servicing is topping up the oil on a Garrard 401
or adjusting the bias current and offset voltage on a Linsley Hood.

--
Eiron.