"Dave Plowman (News)" wrote in message
...
Ian holds up both Decca and RCA as paragons of disc cutting techniques
from analogue tape.

No I am not doing that at all. These are the two major companies
with whom I have first-hand long-term experience. That's all.

Interpret my posts as you will, but.......
Please, please, spell my name correctly.
I would not call you Dae :-))

Cordially,

Iain

In article , Mike Gilmour
wrote:

"Iain M Churches" wrote in message
...


Iain, it's good to have your professional knowledge and expertise here,
a great asset to the group.

I'd agree. That is why I'm looking forwards to the answers to some of the
questions I have been asking Iain. I wish to know more, and to clarify
some of the statements that have been made. Particularly interested as
LP cutting is not a topic where I have any personal experience.

Above said, the questions about 'odd' and 'even' harmonics being
differently treated by feedback (as distinct from the symmetry
of some valve-transformer arrangements) does not seem to me to
be restricted to LP cutting.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

In article , Ian Molton
wrote:
Stewart Pinkerton wrote:

sure they have gear at as little as 395USD but thats a puny 20ks/s POS
(my soundcard does better!)

I want something with (say) a MHz or two of bandwidth...

Why?

Radio Astronomy, among other things.

Surely it cant be too hard - 16 bit @1MHz is only 2MB/sec, easily within
USB2 specs. Obviously this requires a decent ADC but even so...


Unfortunately once you move beyond 'audio' specs the market for kit tends
to fall, and hence prices rise. Hence your best bet is probably the
second-hand dealers who flog off old lab kit. As mentioned in an earlier
posting, see the electronics/radio enthusiast mags for these.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

"Iain M Churches" wrote in message


"Stewart Pinkerton" wrote in message
...


Given a flat open-loop response, NFB affects
all harmonics equally. What cancels even
harmonics is push-pull operation, not NFB,

If you had taken the trouble to read carefully what I wrote,
instead of frothing with expletives, you would have realised
that I was referring to the feedback loop from the secondary
of a push pull output stage.

So what?

The NFB greatly reduces the even harmonics, but not the
odd.

Not unless the transformer is wildly nonlinear.

The odor of male bovine feces comes to mind for some odd reason.

Come on over and have a look at the spectrum analyser.
I have a HP3581A. Even you cannot argue with that:-)

Actually, one can if it is compared to modern equipment.

The HP 3851A cost about $8K US in its heyday, but can be easily be found in
the used equipment market for less than a tenth of that. This is nature's
way of saying it is obsolete. It's no doubt as suitable for the purpose at
hand as it was on the first day of its life, but any bragging rights
associate with its ownership have long since dissipated.

According to the HP 3851A tech manual before me, this analyzer has only
about 80 dB dynamic range. A $100 PC audio interface with appropriate
analytical software (some of which is freeware) can exceed its performance
handily.

BTW, here are my calling-cards: www.pcavtech.com and www.pcabx.com .

It's going to take a (possibly protracted) campaign of someone being 'nice' to
him to bring him round and I'm sorry to say I don't feel up to it
myself....???

I know exactly what you mean. He seems to enjoy some of the posts when his
stylus isn't stuck in the groove. But just when I see a chink of sunlight the
whole ton of bricks comes crashing doen again.

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

"Andy Evans" wrote in message
...
It's going to take a (possibly protracted) campaign of someone being
'nice' to
him to bring him round and I'm sorry to say I don't feel up to it
myself....???

I know exactly what you mean. He seems to enjoy some of the posts when his
stylus isn't stuck in the groove. But just when I see a chink of sunlight
the
whole ton of bricks comes crashing doen again.


Well, I've re-discovered The Wondrous Joy Of Binning and Pinky ain't in it
yet, but my money's on him joining the other ****s before the day's out.

Who TF *needs* their boring, never-ending, samey-samo crap. Wot TF do they
*really* add to anyone's enjoyment of music and audio gear???

Basically as the grapes breakdown new chemical bonds are formed and many of
these are identical to the bonds within say, vanilla or lemon (even
diesel!!!) and so they stimulate the smell/taste senses in the same way.

The 'language' of wine has - and should have - a relatively small
vocabulary.

Winemaking is the original chemistry

"Andy Evans" wrote in message
...
Not a good comparison as the terms used by experienced wine tasters
actually
mean something. I mean this in as much as the flavours and scents that are
described are there due to the chemical reactions that occur in the
fermentation process.

I don't quite follow you -
a) Elderflower, blackberries and green apples are not, as far as I know,
present in grapes?
b) I believe that audiophiles who use specific words do try to create
'reserved' expressions for what they describe in order to gain some
universality of meaning. While this fails a lot of the time, words like
'treble' and 'resolution' are quite reasonable.

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

Winemaking is the original chemistry

Interesting stuff! Do you think the tasters can actually identify the chemicals
involved?

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

"Andy Evans" wrote in message
...
Winemaking is the original chemistry

Interesting stuff! Do you think the tasters can actually identify the
chemicals
involved?

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

You mean like the old joke of the French putting anti-freeze in to make the
wine taste older?

I guess wine tasters train their taste buds and sniffers just as an audio
type would train their lug-holes.

I have won a couple of bets in restaurants correctly identifying wines. Only
as far as the grape type. But there are stories of those who can identify
not just the grape but also the region and from that the soil it was grown
in. The soil thing is just memory really though as you'll know the grape and
which soil is best suited, or the most likely soil for a region blah blah
blah.

I could never listen to a hifi system and get the brands. Although if you
could identify a brand you could from memory go on to identify components
LOL.

In article ,
Iain M Churches wrote:
Ian holds up both Decca and RCA as paragons of disc cutting techniques
from analogue tape.

No I am not doing that at all. These are the two major companies
with whom I have first-hand long-term experience. That's all.

So they're not paragons of disc cutting technique?

You certainly give the impression you consider Decca among the foremost in
the industry judging by your comments on other matters as well - or is
this just where they agree with your own views? ;-)

Interpret my posts as you will, but.......
Please, please, spell my name correctly.
I would not call you Dae :-))

Sorry.

But call me what you want. Others seem to. ;-)

--
*No husband has ever been shot while doing the dishes *

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