Don't know why, but this post prompts me to say I 'moved' a flower bed

I was just about to say that a glass fell behind the 'fridge when the washing
machine crancked up into hyperdrive. Fortunately it was one of those new John
Lewis plastic ones that look just like glass but don't break when the fall
behind the 'fridge when the washing machine crancks up into hyperdrive. You
just reminded me. Andy

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

I wuz just hinting that a bit of 'live and let live' would be a refreshing
change in this group!

I have fantasies about meeting the Pinkerton in a Safeways carpark. Not sure if
he would shake hands or land some karate chop on me, gurgling "there -
acoustically transparent"...........

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

He may be more viscious before breakfast - presumably he sleeps a bit after
meals.

Talking of boobs - I've got this morning's crop of 'Pink Pronunciamenti'
timed as follows:

7:17 am
7:20 am
7:21 am
7:32 am
7:33 am
7:36 am
7:37 am
7:38 am
7:40 am
7:44 am
7:47 am


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

'Ours'....??

(The 'royal we' or do you speak for a shattering majority in this group?)

He was referring to his annus horibilis, where his theories of ss amps burned
down. I think the tapestries caught fire.

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

"Andy Evans" wrote in message
...
I wuz just hinting that a bit of 'live and let live' would be a refreshing
change in this group!

I have fantasies about meeting the Pinkerton in a Safeways carpark.


Not as daft as it sounds - from what he said in a fairly recent exchange, I
suspect he does a bit of 'double bubble' as a 'trolley dolley' on Saturdays
to pay the lecky bills on that Krell of his! (Which is why he spends all
Friday evenings filling his Drafts Folder for a 7 o' clock 'Saturday morning
broadside!! :-)

(Takes on his 'alter ego' and calls himself 'Ingrid', IIRC... :-)

"Andy Evans" wrote in message
...
'Ours'....??

(The 'royal we' or do you speak for a shattering majority in this group?)

He was referring to his annus horibilis, where his theories of ss amps
burned
down. I think the tapestries caught fire.


Allow me to point out a little spelling mistake Andy - it's 'anus
horribilis' in his case.... ;-)

"Andy Evans" wrote in message
...
He may be more viscious before breakfast - presumably he sleeps a bit
after
meals.


Sorry Andy - another one! I think you mean 'viscous'... ;-)

(And I think you'll find he's got the point where he frequently sleeps a bit
*during* meals.... :-)

In article ,
Andy Evans wrote:
The best played piece in the world can still *sound* poor if they
don't do their job well. And do you think all the best of those are
also 'musicians' ?

Yep, that's exactly what I mean. They may be practicing or
non-practicing musicians, but they have musical sensibilities. I could
give you a few names, particularly Jan-Erik Kongshaug who did Keith
Jarrett's award winning recordings and is flown all over the place to do
ECM recordings. He's a very fine guitarist. I had the pleasure of
listening to his master recordings of Jarrett in his Oslo studio,
together with the drummer (Jon Christenson) playing the kit live, and
then listening to the master. What was obvious was the 'musical' way he
had EQd the drums. No funny cables, esoteric rack stuff - just a pair of
extremely musical ears.

Well, you've managed to name one out of many many thousands. Do you think
this proves the rule? And just how can you be certain it has any relevance
anyway?

FWIW, anyone who listens to music of any kind through choice could be said
to have musical sensibilities.

--
*Why is it called tourist season if we can't shoot at them?

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

In article ,
Andy Evans wrote:
Being a professional musician and having a good 'ear' for sound are not
- by a long chalk - interdependent

Extraordinary statement. So would you say that being an engineer and
being able to understand circuits "are not - by a long chalk -
interdependent" as well?

Plenty of excellent recording engineers have little understanding of
circuits at the component level. It just isn't necessary.

An maintenance engineer is a different matter.

Design engineers rarely have any involvement in the operation of audio
equipment on a pro basis.

--
*To be intoxicated is to feel sophisticated, but not be able to say it.

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

"Don Pearce" wrote in message
...
On Sat, 23 Oct 2004 11:56:06 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On 23 Oct 2004 09:46:13 GMT, ohawker (Andy
Evans) wrote:

Hello Don -
Are you suggesting backing off a bit on the operating point?

Well you could, but then the distortion at higher levels would climb
hugely. For low distortion this is simply not a good topology.(DP)

This is all very useful - thank you for your attention. What would you
suggest?
I have about 1000 valves to chose from so I should have something I can
use.
Andy

Well, for a start I would suggest you move away from triodes - they
have soggy characteristics and a tendency to shut off because of space
charge. A tetrode cures that problem, but pentodes are better yet.



Why is 'space charge' a particular problem? I know it (with the lack of
grids) is one of the reasons triodes are/have to be relatively low power,
but I thought it has some usefulness:

"On the other hand, space charge came in quite handy in some tube
applications because it generates a negative EMF within the tube's
envelope,
which could be utilized to create a negative bias on the tube's grid. This
could improve the engineer's control and fidelity of amplification."

Over my head really and I'm not sure I *need* to know, but I'm only
learning
here and it's interesting - beats the usual 'all valve amps are crap - go
on, admit it. just admit it' crap we see from a certain quarter.... ;-)

(*Fetch it, boy !!!*...... :-)



No what it does is build up between the grid and the anode, and
effectively stop the electrons moving - a real nuisance. The addition
of a fourth electrode coincidentally made the transfer characteristic
of the tetrode pretty similar to that of a JFET.


Yes and pentodes similar to MOSFETS I gather...??