cables & blocks confusion

[professorhat]

You do assume that, then you see posts from the like of vanman, and something niggles at the back of your mind...

 

[Anonymous]

[quote user="bloney"][quote user="trevor79"]Wow, this thread is still going!

I will try to keep the explanations simple and straightforward.......UK mains supply is rated at 240/250v,[/quote]

Erm, ok. You obviously know your stuff, so I won't argue [/quote]

He doesn't know his stuff.

 

[Anton90125]

[quote user="Eddy Current"]I don't know, but who said it was already perfect?[/quote]

Well, in one of you responses to me you said :

[quote user="Eddy Current"] There are no "harmonics which break through the rectification and smoothing stages" to eliminate. Get a 'scope and look at the ripple on the low signal supply lines in your amp if you doubt my word. You can try it with or without your variac, because it won't change a thing.[/quote]

Now my understanding of a power supply ( in a hifi context) is simply to provide a stable voltage regardless of whats happening on the main supply. Your statement (to me at least) suggests that a" perfect power supply" condition as been reached in that there is supposedly no measurable ripple/noise harmonics present.

I am not in a position to actually check physically the power rails (in that I need an oscilloscope and a spectrum analyser ). All I can do is listen (blind tested when possible).On every occasion I have tested a variac,I have heard a difference.It is also significant that so many hifi manufactures (who don't manufacture or sell conditioners or have a vested interest in conditioners) where using variacs.

I don't know your electronics background is but when people like the hifi guru :Tim de Paravicini (who's electronics credentials are impeccable in hifi and more importantly the professional sector) state things like "Regulation is only a device used by conventional circuits because they conventionally are too sensitive to their power supplies." or "I try to design the beast to be relatively immune to the supply.",the implication is that power supplies are less then perfect and can compromise the overall performance of the"conventional circuits".

I am still amazed that you won't even try a conditioner or a variac just out of interest and scientific curiosity.

I am wondering whether you fit "reality to fit theory" instead of "theory to fit reality "??? If it was the latter then (despite your gut feeling or what theory currently says) you would have no qualms in doing some blind tested listening tests.

 

[Anton90125]

[quote user="Eddy Current"]
In some cases, like a clicking noise in a susceptible amplifier when a fridge or heating system goes on and off, a conditioner might just help. But do they make a general improvement in sound quality? No, of course they don't.

Regards Ed
[/quote]

If you can hear clicks and conditioners do help then there has to have been some harmonic break through.The clicks being an extreme form of this. If this noise condition on the mains can cause a harmonic break through then how can you be sure that other types of less extreme noise won't cause a breakthrough?

 

[Anonymous]

[quote user="Anton90125"][quote user="Eddy Current"]

In some cases, like a clicking noise in a susceptible amplifier when a fridge or heating system goes on and off, a conditioner might just help. But do they make a general improvement in sound quality? No, of course they don't.

Regards Ed
[/quote]

If you can hear clicks and conditioners do help then there has to have been some harmonic break through.The clicks being an extreme form of this. If this noise condition on the mains can cause a harmonic break through then how can you be sure that other types of less extreme noise won't cause a breakthrough?

[/quote]

There's an easy way to tell. Can you guess what it is?

 

[John Duncan]

Oooo I love quizzes. Don't tell me! Don't tell me!

 

[timwileman]

[quote user="JohnDuncan"]Oooo I love quizzes. Don't tell me! Don't tell me![/quote] i'm not lovin this one so far.....

 

[Anonymous]

If it involves any cutting I'm gonna ask vanman to try it out.

 

[professorhat]

[quote user="Eddy Current"]There's an easy way to tell. Can you guess what it is?[/quote]

What do we do if we can't guess?

 

[timwileman]

[quote user="professorhat"][quote user="Eddy Current"]There's an easy way to tell. Can you guess what it is?[/quote]

What do we do if we can't guess?
[/quote] talk about hobnobs, its a lot more fun

 

[John Duncan]

if a little brainless..........

 

[timwileman]

[quote user="JohnDuncan"]if a little brainless..........[/quote]yep but thats the direction this thread was heading.....

 

[John Duncan]

good point, well made.

 

[Andrew Everard]

May I can this thread now, please...?

 

[Anonymous]

[quote user="Andrew Everard"]
May I can this thread now, please...?
[/quote]I know what you mean. Rather wouldn't have threads like this in the first place...If you shut it down, however, it will pop up again and again. Furthermore Eddy Current made some big statements that left him in quite an awkward position- i'd like to see how/if he manages to get out of it.

 

[John Duncan]

[quote user="Solomon1"][quote user="Andrew Everard"]

May I can this thread now, please...?
[/quote]

I know what you mean. Rather wouldn't have threads like this in the first place...
If you shut it down, however, it will pop up again and again. Furthermore Eddy Current made some big statements that left him in quite an awkward position- i'd like to see how/if he manages to get out of it.
[/quote]

Holds breath.

Dies.

 

[professorhat]

[quote user="Solomon1"]Furthermore Eddy Current made some big statements that left him in quite an awkward position- i'd like to see how/if he manages to get out of it.[/quote]
He won't. He'll just ignore the thread until someone makes another statement, then refute it with no evidence as per usual...

 

[Andrew Everard]

OK, we'll let it run, then...

 

[Anonymous]

Isn't anyone going to have a go at guessing?

 

[timwileman]

[quote user="Andrew Everard"]
May I can this thread now, please...?
[/quote] yes please....pk of hobnobs in it for you ha ha

 

[Anonymous]

[quote user="Eddy Current"]
Isn't anyone going to have a go at guessing?

[/quote]The (presumably anti-)climax is just killing me...

With every moment of hesitation you're making the professor's words more true.

 

[timwileman]

[quote user="Eddy Current"]
Isn't anyone going to have a go at guessing?

[/quote]no

 

[Anonymous]

Ah, I like my 'mains' like my coffee.........filtered, with hob nobs of course!

Now where did I put those 13amp fuses?

 

[Andrew Everard]

[quote user="Eddy Current"]Isn't anyone going to have a go at guessing?[/quote]

I've even forgotten/stopped caring what it is we're supposed to be guessing about.

 

[Anonymous]

[quote user="Eddy Current"]
Isn't anyone going to have a go at guessing?

[/quote]For god's sake, man, spit it out. You remind me of a joke my grandparants had printed on a tile hanging on the wall. (Translated from Frisian dialect the waverer was about to give it a go....sadly, he died sooner.