In article ,
Bob Latham wrote:
Whereas I am in the situation of accepting that you might be correct in
your report, but on the basis of doubting it was microphony. :-)

I'd be interested to hear a better explanation.

I've payed around a great deal with all sorts, and never come across what
I'd describe as true microphony on anything solid state. You might well
get some form of output when you thump it, but that's not quite the same
thing.

--
*Marathon runners with bad footwear suffer the agony of defeat.*

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

Bob Latham wrote:

Sorry can't think of any. The only sensible explanation I can see is that
the shelf was vibrating more than the floor and the vibration had an
audible effect on the amplifier's performance.

Which, for an SS amp, indicates a fault.

Bob Latham wrote:

It could that the amplifiers had something unique that caused this effect
but I think that unlikely. I think it more likely that this happens in
most amplifiers but to a much less obvious and variable degree. That is
just my opinion not my knowledge.

Perhaps - however its far more likely to be something like a loose
component. for all we know its a broken volume control that resonates at
certain frequencies - but without testing its all guesswork.

Kurt Hamster wrote:

Doesn't make a whole lot of 'significance' either way, unless of course
you were prepared to put the full amount into escrow.

Which I'm not.

"Stewart Pinkerton" wrote in message
...
On Tue, 12 Oct 2004 12:13:25 +0100, "Keith G"
wrote:

"Ian Molton" wrote in message
...
Bob Latham wrote:

I am asking you to believe what I said in the story is in no way
intentionally fabricated.

No-one doubted that.

What people are annoyed about is your insistence that the effect can be
generalised to all SS amps,

Interesting hypocracy - it's OK to generalise about valve amps but not
about
SS.....???

Who has ever done that?



The 'all valve amps are crap' brigade - a remark which is only a little less
facile than the 'all *bad* XXX amps are crap'....

In your case, delete whichever doesn't apply.....


(Figures.....)

Unfortunately, you didn't figure before posting.........


Good, coming from you, from what I've seen this evening!

Ian Molton wrote:

mnementh is my firewall/webserver/database/home theatre PC and lives
under the TV. like all the other PCs here it boots from a networked
storage server here which lives under the floor. mnementh has no
moving parts (axcept its DVD-rom) and is actually 100% silent.

No moving parts? How does the processor work then? ;-)


the storage box has a gig of RAM and lives under the floor. it has
ethernet and 2 harddiscs, which are tied together using md, so I can
just add new discs into the filesystem and grow it onto them - no
stupid drive letters, no '**** I have 300G on 9 partitions so I cant
save my 50G file...' it just *works*.

Not unlike my 2TB Windows music server array then :-)))))

Stimpy wrote:
Ian Molton wrote:

mnementh is my firewall/webserver/database/home theatre PC and lives
under the TV. like all the other PCs here it boots from a networked
storage server here which lives under the floor. mnementh has no
moving parts (axcept its DVD-rom) and is actually 100% silent.


No moving parts? How does the processor work then? ;-)

Its a Via Samuel II (via Epia 6000M motherboard). It has no fan.

the storage box has a gig of RAM and lives under the floor. it has
ethernet and 2 harddiscs, which are tied together using md, so I can
just add new discs into the filesystem and grow it onto them - no
stupid drive letters, no '**** I have 300G on 9 partitions so I cant
save my 50G file...' it just *works*.

Not unlike my 2TB Windows music server array then :-)))))

Only in terms of it being a large filestore. if differs in that

1) its run under a reliable OS
2) all the other machines *boot and run* off it. Its also under the floor.

OOI, what are you using NTFS on raid or what? (Im using Ext3 on LVM2)

I run gigE to the server and my desktop. Everyone else is on 100Mbit

thats 100MB/sec in *both* read and write, simultaneously (in theory).
Certainly its no slower than when the discs were actually in my PC - I
can still fling DVD images around with abandon.

Kurt Hamster wrote:



Heheheh, wish I was

Pontificating, pious prats who insist on 'do as I say, not as I do' ****
me right off.

Not to mention the "MUST measure it before I use it brigade"...

WTF ever happened to 'buy with your ears'?


'buy with your ears' didn't go away ... it just has been improved to
produce a level playing field and remove bias when auditioning equipment
for purchase ...

(of course, putting aside things like cost, looks and features)

Ian Molton wrote:

Tat Chan wrote:

(now rebuilding X-Windows ... I remember the days when I was happy to
recompile the whole Linux kernel in less than 5 minutes. Ah, the good
old days).


You still can... the kernel seems to have grown at about the same rate
as CPUs have. well slightly less actually. I can doa full build (core
and modules) in about 3 minutes).

well, the last time I recompiled the kernel, USB support was still in
its infancy.

mnementh is my firewall/webserver/database/home theatre PC and lives
under the TV. like all the other PCs here it boots from a networked
storage server here which lives under the floor. mnementh has no moving
parts (axcept its DVD-rom) and is actually 100% silent.

so the other PCs are like enhanced "dumb terminals"?


the storage box has a gig of RAM and lives under the floor. it has
ethernet and 2 harddiscs, which are tied together using md, so I can
just add new discs into the filesystem and grow it onto them - no stupid
drive letters, no '**** I have 300G on 9 partitions so I cant save my
50G file...' it just *works*.

excuse my ignorance, but what is the md system? something more flexible
than a RAID system?




mnementh has its own isolated rootfs on the storage box (it is the
firewall!) but all the other PCS share a common root filesystem. when
they boot the storage serevr assigns them an IP via DHCP and they use
the ip to determine what other non-common parts of the filesystem they
should pick up - eg. my machine and SWMBOs machine share the rootfs but
have different /tmp, /mnt, /var etc. all machines except mnementh also
share /home and some common storage.

so SWMBO is *nix literate then?




We only have one PC to back up now too, which is nice. only 108Gig free
right now though... need to rent some more DVDs...


Back in my days, you were lucky to get a 40MB hard drive!

On Tue, 12 Oct 2004 20:34:34 +0100, "Keith G"
wrote:

"Stewart Pinkerton" wrote in message
.. .
On Tue, 12 Oct 2004 12:13:25 +0100, "Keith G"
wrote:

"Ian Molton" wrote in message
...

What people are annoyed about is your insistence that the effect can be
generalised to all SS amps,

Interesting hypocracy - it's OK to generalise about valve amps but not
about
SS.....???

Who has ever done that?

The 'all valve amps are crap' brigade -

Never seen *anyone* say that.

a remark which is only a little less
facile than the 'all *bad* XXX amps are crap'....

Not quite as facile as 'all valve amps are wonderful', though.......

--

Stewart Pinkerton | Music is Art - Audio is Engineering