OT - Everything is perfect
 

"Mike Gilmour" wrote in message
...
Nice of you to join us so late in the proceedings
I'm look forward to SP proving his 'relevant audio knowledge' to Iain M
Churches an expert in his field. As that is not happening I can quite
easily dismiss your next statement.

Mike

I did not say I was an expert.
An expert is a person who knows more and more about less and
less until he knows everything about nothing:-))

I said I was a professional. I have worked in the recording business
all my life, and get paid for the pleasure of doing so:-)))

Iain

OT - Everything is perfect
 

Church seems to shape up as a should-be-retired BS artist backed up with
obsolete audio knowlege and ancient test equipment. He's hardly a threat
to SP, let alone me.


Insult me, if you must.
But please spell my name right:-)

Iain

OT - Everything is perfect
 

"Iain M Churches" wrote in message

Church seems to shape up as a should-be-retired BS artist backed up
with obsolete audio knowlege and ancient test equipment. He's hardly
a threat to SP, let alone me.


Insult me, if you must.
But please spell my name right:-)

Instead of posturing about nothing Iain, why not explain your exceptional
claims about feedback reducing some orders of distortion, but not others. I
believe you said that even versus odd is the dividing line.

OT - Everything is perfect
 

However I realise that I am unfashionably old and old-fashioned

No, Jim you're fine. The only thing that can be stressful is being asked for
data to support everything. It's not that data doesn't exist, it's just that it
can be a real time consuming task finding it. I'm awash with data in my work,
and, for instance, someone asked for a radio programme on Sunday "where's the
reference for over 80% of Japanese orchestral musicians experiencing
performance anxiety". I happen to know that the figure is over 80% but I'd have
to find the reference to give the exact number. In strictly academic circles
this would matter, but on newsgroups - which I take as recreational - is it
really fair to ask people to pull out all kinds of references? You may be able
to put your hand on things very fast - you refer to your indexing systems. I
live in a flat in Kensington and a lot of my stuff is - unavoidably - in boxes
under the bed. Space costs a lot of money in Kensington!

=== Andy Evans ===
Visit our Website:- http://www.artsandmedia.com
Audio, music and health pages and interesting links.

OT - Everything is perfect
 

"Arny Krueger" wrote in message
...

Instead of posturing about nothing Iain, why not explain your exceptional
claims about feedback reducing some orders of distortion, but not others.
I believe you said that even versus odd is the dividing line.

I was referring to feeback from the output transformers of push pull
UL valve amplifiers.

This is something I have been taught, and took to be true.
I will try to find some written reference.
If this proves not to be the case, then I will happily admit
the fact.


Iain

OT - Everything is perfect
 

"Arny Krueger" wrote in message
...
Church seems to shape up as a should-be-retired BS artist backed up
with obsolete audio knowlege and ancient test equipment. He's hardly
a threat to SP, let alone me.

Now what makes you think I have any intention of being a threat to
anyone. Your paragraph smacks of insecurity methinks.

So you set yourself even above SP?
Care to tell us of your pedigree Arny?

Cordially,

Iain

OT - Everything is perfect
 

"Iain M Churches" wrote in message

"Arny Krueger" wrote in message
...

Instead of posturing about nothing Iain, why not explain your
exceptional claims about feedback reducing some orders of
distortion, but not others. I believe you said that even versus odd
is the dividing line.

I was referring to feedback from the output transformers of push pull
UL valve amplifiers.

Of course, a fact that doesn't help your claims very much.

This is something I have been taught, and took to be true.

Since you claim you have a spectrum analyzer Iain, why haven't you
investigated this claim for yourself?

I will try to find some written reference.

Rotsa ruck finding a *credible* reference.

I wouldn't be surprised that some dreamer someplace has the same
misapprehension, though.

If this proves not to be the case, then I will happily admit
the fact.

Good.

OT - Everything is perfect
 

"Arny Krueger" wrote in message
...
Since you claim you have a spectrum analyzer Iain, why haven't you
investigated this claim for yourself?

I have both the HP3580A andf 3581A.
I took a look at the Radford STA100 with THD
at 0.09% at full power, I could see traces of 3H, 5H, and 7H etc
but no even harmonics.

Iain

OT - Everything is perfect
 

In article ,
Arny Krueger wrote:
The welcome arrival of someone with genuine experience of recording
has already gone a long way to stem the flow of bull**** from a
couple of the worst offenders in this group.

Thanks for indicting yourself, Keith. Who else is riding in that
sinking, stinking ship with you?

Yes. KG only welcomes 'genuine experience' where it agrees with his
laughable beliefs. Other genuine experience which doesn't is, of course,
not worth a candle.

However, if genuine experience in the recording industry is what he values
above all else, just what percentage of those working in it would he says
prefer LP to CD?

Would he think the majority? If so, I've got news for him...

--
*If I throw a stick, will you leave?

Dave Plowman London SW
To e-mail, change noise into sound.

OT - Everything is perfect
 

"Iain M Churches" wrote in message


"Arny Krueger" wrote in message
...

Since you claim you have a spectrum analyzer Iain, why haven't you
investigated this claim for yourself?

I have both the HP3580A andf 3581A.
I took a look at the Radford STA100 with THD
at 0.09% at full power, I could see traces of 3H, 5H, and 7H etc
but no even harmonics.


http://www.drtube.com/icon-gif.gif pretty well tells the story - the
Radford STA 100 is a pretty conventional push-pull tube power amp. If
reasonably well-balanced, the even harmonics should be at least 20 dB below
the odd ones. That would put them at least 20 dB below 0.009% or at -100
dB or less.

Since the dynamic range of your measurement equipment is about 80 dB, -100
dB or lower harmonics can resaonably be expected to be lost in the noise
floor.

My test bench has a measurement residual of about -110 dB, so I would expect
to see both even and odd harmonics in the proper amounts.