[Eeyore]

Arny Krueger wrote:

"Eeyore" wrote in
Arny Krueger wrote:
"Eeyore" wrote
Phil Allison wrote:
"Eeyore"

In fact I've a sort of grudge to bear in fact.

** So THAT is what " Eeyore " really is -

a bear with some sort of grudge ??

Long story. Only a small grudge really. I must learn
to lie in job interviews too.

** Oh - that job Doug got with Soundcraft ?

Uhuh.


He did the power amp stage of their "PowerStation".

Joke isn't it ?

What's wrong with it?

Do tell!

It's fairly 'routine'. That's the joke.

IOW, despite the use of a "big name" designer, the wine came out tasting
pretty ordinaire.

Is it class G?

The one I saw was just A/B.


I notice that Self makes some heavy claims about a proprietary implemention
of class G.

I haven't heard that. I'd be curious to know how it can be made proprietary !

Graham

[Bertie the Bunyip]

Eeyore wrote in
:



Arny Krueger wrote:

"Eeyore" wrote in
Arny Krueger wrote:
"Eeyore" wrote
Phil Allison wrote:
"Eeyore"

In fact I've a sort of grudge to bear in fact.

** So THAT is what " Eeyore " really is -

a bear with some sort of grudge ??

Long story. Only a small grudge really. I must learn
to lie in job interviews too.

** Oh - that job Doug got with Soundcraft ?

Uhuh.


He did the power amp stage of their "PowerStation".

Joke isn't it ?

What's wrong with it?

Do tell!

It's fairly 'routine'. That's the joke.

IOW, despite the use of a "big name" designer, the wine came out
tasting pretty ordinaire.

Is it class G?

The one I saw was just A/B.


I notice that Self makes some heavy claims about a proprietary
implemention of class G.

I haven't heard that. I'd be curious to know how it can be made
proprietary !

Graham




fjukkwit netkkop


Bertie

[Arny Krueger]

"Eeyore" wrote in
message
Arny Krueger wrote:

"Eeyore" wrote
in
Arny Krueger wrote:
"Eeyore" wrote
Phil Allison wrote:
"Eeyore"

In fact I've a sort of grudge to bear in fact.

** So THAT is what " Eeyore " really is -

a bear with some sort of grudge ??

Long story. Only a small grudge really. I must learn
to lie in job interviews too.

** Oh - that job Doug got with Soundcraft ?

Uhuh.


He did the power amp stage of their "PowerStation".

Joke isn't it ?

What's wrong with it?

Do tell!

It's fairly 'routine'. That's the joke.

IOW, despite the use of a "big name" designer, the wine
came out tasting pretty ordinaire.

Is it class G?

The one I saw was just A/B.


I notice that Self makes some heavy claims about a
proprietary implemention of class G.

I haven't heard that. I'd be curious to know how it can
be made proprietary !


http://www.dself.dsl.pipex.com/ampins/classg/g.htm


"Class-G is now out and about. So what has changed? This would be easier to
answer if there had been more published on the technology; as it is I have
to rely pretty much on my own research. I found that Schottky power diodes
have eliminated the commutation-diode glitching. Having peeled this skin
from the distortion onion, linearity was still signficantly poorer than a
Blameless Class-B design. This proved to be due to Early effect in the
output stage devices, stemming from the sudden changes in collector voltage
they experience in Class-G operation. I had my own ideas about how to deal
with this, and you can read all in Electronics World for Dec 2001 and Jan,
Feb 2002. There is a fully worked-out design, and even a PCB available to
ease building it."

The "Early Effect" amounts to being an increase in beta with increased VCE.
The happens in a class-G amp when the power supply voltage is switched to a
higher voltage.

[Eeyore]

Arny Krueger wrote:

"Eeyore" wrote in
Arny Krueger wrote:

I notice that Self makes some heavy claims about a
proprietary implemention of class G.

I haven't heard that. I'd be curious to know how it can
be made proprietary !

http://www.dself.dsl.pipex.com/ampins/classg/g.htm

"Class-G is now out and about. So what has changed? This would be easier to
answer if there had been more published on the technology; as it is I have
to rely pretty much on my own research. I found that Schottky power diodes
have eliminated the commutation-diode glitching. Having peeled this skin
from the distortion onion, linearity was still signficantly poorer than a
Blameless Class-B design. This proved to be due to Early effect in the
output stage devices, stemming from the sudden changes in collector voltage
they experience in Class-G operation. I had my own ideas about how to deal
with this, and you can read all in Electronics World for Dec 2001 and Jan,
Feb 2002. There is a fully worked-out design, and even a PCB available to
ease building it."

The "Early Effect" amounts to being an increase in beta with increased VCE.
The happens in a class-G amp when the power supply voltage is switched to a
higher voltage.

I notice that his ideas on the matter can only apparently be read in the copies
of EW mentioned.

His does pontificate a heck of alot !

Graham

[Arny Krueger]

"Eeyore" wrote in
message
Arny Krueger wrote:

"Eeyore" wrote
in
Arny Krueger wrote:

I notice that Self makes some heavy claims about a
proprietary implemention of class G.

I haven't heard that. I'd be curious to know how it can
be made proprietary !

http://www.dself.dsl.pipex.com/ampins/classg/g.htm

"Class-G is now out and about. So what has changed? This
would be easier to answer if there had been more
published on the technology; as it is I have to rely
pretty much on my own research. I found that Schottky
power diodes have eliminated the commutation-diode
glitching. Having peeled this skin from the distortion
onion, linearity was still signficantly poorer than a
Blameless Class-B design. This proved to be due to Early
effect in the output stage devices, stemming from the
sudden changes in collector voltage they experience in
Class-G operation. I had my own ideas about how to deal
with this, and you can read all in Electronics World for
Dec 2001 and Jan, Feb 2002. There is a fully worked-out
design, and even a PCB available to ease building it."

The "Early Effect" amounts to being an increase in beta
with increased VCE. The happens in a class-G amp when
the power supply voltage is switched to a higher voltage.

I notice that his ideas on the matter can only apparently
be read in the copies of EW mentioned.

His does pontificate a heck of alot !

I believe that Self also added some stuff on his allegedly new Class G
technology in his book.

"Audio Power Amplifier Design Handbook, Fourth Edition" It's about $50 in
paperback from Amazon.