Keith G wrote:

(Quote from some anonymous Shakespearean scholar)


"I believe it is from HAMLET..& GOES SOMETHING LIKE: I am but mad
north-northwest..when the wind is southerly I can tell a hawk from a
Hearnshaw. Hand saw is a corruption of this & it means heron."

"Shakespeare imparts Hamlet's mental complexion in Act 2, Scene 2. Speaking
to Guildenstern - who he ingeniously has dispatched along with Rosencrantz -
Hamlet claims that "my uncle-father and aunt-mother are deceived," followed
by this exchange:

GUILDENSTERN: In what, my lord?

HAMLET: I am but mad north-north-west. When the wind is southerly I know a
hawk from a handsaw."


Hamlet was a city boy. A bird was a bird to him.
A handsaw is a tool for cutting stuff.
A hawk is a flat thing for plastering walls.
Hearnshaw is 'Eathcliffe's girlfriend.

HTH,

Roger.

"Jim Lesurf" wrote in message
...
In article , Trevor Wilson
wrote:


**Just a small pedantic point:

A Koala is not a bear. In fact, the Koala is more closely related to the
Kangaroo, than it is to _any_ mammal.

OK, its a fair cop. I didn't know that! :-) Next time I'll stick to
using
ravens and writing desks as my example and people can then argue about
what
that meant. :-)

**No worries, Jim. Now, back to the topic at hand.

'Slam', in the context I used it in, relates to the ability of an amplifier
to correctly (or at least more closely approximate) the dynamic contrasts of
a live musical event. MOSFETs seem to compress music. Not in an obvious,
easily measurable way. Just subtly and insidiously.


--
Trevor Wilson
www.rageaudio.com.au

"Jim Lesurf" wrote in message
...
In article , Trevor Wilson
wrote:


**Just a small pedantic point:

A Koala is not a bear. In fact, the Koala is more closely related to the
Kangaroo, than it is to _any_ mammal.

OK, its a fair cop. I didn't know that! :-) Next time I'll stick to
using
ravens and writing desks as my example and people can then argue about
what
that meant. :-)

**No worries, Jim. Now, back to the topic at hand.

'Slam', in the context I used it in, relates to the ability of an amplifier
to correctly (or at least more closely approximate) the dynamic contrasts of
a live musical event. MOSFETs seem to compress music. Not in an obvious,
easily measurable way. Just subtly and insidiously.


--
Trevor Wilson
www.rageaudio.com.au

"Old Fart at Play" wrote in message
...
Jim Lesurf wrote:


Also, 2,200 uF is perhaps a tad on the small side if you want to support
sustained mean currents of the order of over 30 Amps per channel (i.e.
over
60 Amps total for stereo), particularly using a non-SMPS! The resulting
voltage ripple may be too high.


Where is all this current going?
Does this hypothetical amplifier provide 25kW per channel into 8ohms?

**Here is an impedance curve of a '4 Ohm' rated loudspeaker:

www.rageaudio.com.au/kappa9.jpg


Do the math.


--
Trevor Wilson
www.rageaudio.com.au

"Old Fart at Play" wrote in message
...
Jim Lesurf wrote:


Also, 2,200 uF is perhaps a tad on the small side if you want to support
sustained mean currents of the order of over 30 Amps per channel (i.e.
over
60 Amps total for stereo), particularly using a non-SMPS! The resulting
voltage ripple may be too high.


Where is all this current going?
Does this hypothetical amplifier provide 25kW per channel into 8ohms?

**Here is an impedance curve of a '4 Ohm' rated loudspeaker:

www.rageaudio.com.au/kappa9.jpg


Do the math.


--
Trevor Wilson
www.rageaudio.com.au

Hamlet was a city boy. A bird was a bird to him.

Hamlet is a small cigar manufactured in the UK from the tough stuff you
can't use for making cigarettes. A bird is a small winged creature... In
the 60s it wore a short frock and made you have it !

A handsaw is a tool for cutting stuff.

A handsore is what you get from using a handsaw for long periods

A hawk is a flat thing for plastering walls.

A hawk is a vicious bird. You cannot plaster anything with one of these.
Even using a dead one, you have no hope of getting anything flat and level.
You plaster with a float... The unskilled may call it a plasterers trowel.
A hawk is a stick with a flat square of wood on the top. You load the
plaster on the hawk, hold it in your left hand, flick the plaster onto the
float in your right hand and smack it on the wall

Hearnshaw is 'Eathcliffe's girlfriend.

Hearnshaw is a state of uncertainty... You are either, sure, or you are,
hearnshaw

regards
jim

Hamlet was a city boy. A bird was a bird to him.

Hamlet is a small cigar manufactured in the UK from the tough stuff you
can't use for making cigarettes. A bird is a small winged creature... In
the 60s it wore a short frock and made you have it !

A handsaw is a tool for cutting stuff.

A handsore is what you get from using a handsaw for long periods

A hawk is a flat thing for plastering walls.

A hawk is a vicious bird. You cannot plaster anything with one of these.
Even using a dead one, you have no hope of getting anything flat and level.
You plaster with a float... The unskilled may call it a plasterers trowel.
A hawk is a stick with a flat square of wood on the top. You load the
plaster on the hawk, hold it in your left hand, flick the plaster onto the
float in your right hand and smack it on the wall

Hearnshaw is 'Eathcliffe's girlfriend.

Hearnshaw is a state of uncertainty... You are either, sure, or you are,
hearnshaw

regards
jim

Trevor Wilson wrote:


**Here is an impedance curve of a '4 Ohm' rated loudspeaker:

www.rageaudio.com.au/kappa9.jpg


Do the math.


From the impedance curve that's not a 'difficult load'
but rather a serious design fault.

Got any more details? I could do with a good laugh!

Roger.

Trevor Wilson wrote:


**Here is an impedance curve of a '4 Ohm' rated loudspeaker:

www.rageaudio.com.au/kappa9.jpg


Do the math.


From the impedance curve that's not a 'difficult load'
but rather a serious design fault.

Got any more details? I could do with a good laugh!

Roger.

"Old Fart at Play" wrote in message
...
Trevor Wilson wrote:


**Here is an impedance curve of a '4 Ohm' rated loudspeaker:

www.rageaudio.com.au/kappa9.jpg


Do the math.


From the impedance curve that's not a 'difficult load'
but rather a serious design fault.

**Perhaps. It was not only a very popular model, here and in the US, but is
far from an isolated example. It is the Infinity Kappa 9.


Got any more details? I could do with a good laugh!

**You wanted a reason why amplifiers should need to have a seriously capable
power supply. The above example is one of those reasons.


--
Trevor Wilson
www.rageaudio.com.au