In article .com,
Andy
Evans wrote:
My advice is to be skeptical of mains conditioners and special mains
leads. Almost all installations will not need any mains conditioning.


I'm in a London flat and you can well imagine the layers of crud flying
about everywhere. I use a big industrial double toroid mains conditioner
- serious kit, not Russ Andrews - and it does improve the sound.

In which case I think it likely that the audio equipment you are using is
poorly designed and/or poorly made. The best advice in most such cases is
probably to choose decent equipment.

FWIW I lived in a London flat for many years with no such problems. Since I
worked in the audio biz at the time I also spent some time going around to
various places in London and both using equipment there *and* checking the
mains on some occasions. In general, the only 'problem' that was at all
usual was some transformers would 'buzz', but the electrical performance of
the equipment was unaffected.

The worst mains crud I encountered was actually in a well-known shop east
of London. They had quite dire amounts of spikes on the mains. Yet none of
the people who worked there, nor their customers, apparently had ever
noticed till I detected this and pointed it out.

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

"Jim Lesurf" wrote in message
...
In article , John Phillips
wrote:
On 2006-07-10, Keith G wrote:

"John Phillips" wrote in message
...
...

You *are* Jim Lesurf and I claim my 5 pounds.....

;-)

I take that as a compliment.

Well, I take it as a compliment that you say so. :-)

I don't know if Jim will see it the same way, though ...

I agreed with what you wrote about power conditioning, etc. Didn't
contribute as it seemed like the relevant points had been covered.

We may now have to wonder who gets 5 pounds, though... :-)


I do, because you are *also* Jim Lesurf and I claim my 5 pounds!

(I make that a tenner I've got coming now....!! :-)

In article , Keith G
wrote:

"Jim Lesurf" wrote in message
...
In article , John Phillips


We may now have to wonder who gets 5 pounds, though... :-)


I do, because you are *also* Jim Lesurf and I claim my 5 pounds!

(I make that a tenner I've got coming now....!! :-)

Less my ten percent as your agent... ;-

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

"Jim Lesurf" wrote in message
...
In article , Keith G
wrote:

"Jim Lesurf" wrote in message
...
In article , John Phillips


We may now have to wonder who gets 5 pounds, though... :-)


I do, because you are *also* Jim Lesurf and I claim my 5 pounds!

(I make that a tenner I've got coming now....!! :-)

Less my ten percent as your agent... ;-



Nice try, but as I am the claimer that makes you the claimee and the 10%
would effectively be 'retention money' and it doesn't work like that...

;-)

Andy Evans wrote:

I'm in a London flat and you can well imagine the layers of crud
flying about everywhere.

Don't they have hoovers in London, then?


--
Wally
www.wally.myby.co.uk

On 2006-07-11, Jim Lesurf wrote:
In article .com,
Andy
Evans wrote:
My advice is to be skeptical of mains conditioners and special mains
leads. Almost all installations will not need any mains conditioning.


I'm in a London flat and you can well imagine the layers of crud flying
about everywhere. I use a big industrial double toroid mains conditioner
- serious kit, not Russ Andrews - and it does improve the sound.

In which case I think it likely that the audio equipment you are using is
poorly designed and/or poorly made. The best advice in most such cases is
probably to choose decent equipment.

Well, it may be cheaper to add a conditioner than to change equipment
where the kit actually is mains sensitive. However there are clearly
several different flavours of mains conditioner around so it isn't a case
of just buying one at about the right price and assuming it will work.

I have not found any effect I can hear from a few different types of RF
and spike filtering applied to my kit. I may try an isolating transformer
some time if one turns up that I can use. It should take out any residual
DC effects. I can't quite understand why you may need two (as in Andy's
"double toroid mains conditioner") but maybe some research will explain.

--
John Phillips

I think it likely that the audio equipment you are using is poorly
designed and/or poorly made opined Jim.

Yes, of course it is, of course it is.

On 2006-07-13, Andy Evans wrote:
I can't quite understand why you may need two (as in Andy's "double
toroid mains conditioner") but maybe some research will explain

I haven't looked in mine but the general idea of back to back toroids
is that you have low voltage between them so you can use low voltage
smoothing componants.

Do you mean (if you know) it goes:

- mains AC - low-V AC - low-V DC - inverter - mains AC

That would be a potentially very good architecture for removing a lot
of mains irregularities (although I am still of the view it is trivial
to design audio kit to reject normal mains aberrations).

--
John Phillips

In article ,
John Phillips wrote:
I have not found any effect I can hear from a few different types of RF
and spike filtering applied to my kit. I may try an isolating
transformer some time if one turns up that I can use.

Surely most audio equipment already has an isolating transformer as part
of the power supply?

--
*Some days you're the dog, some days the hydrant.

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