Replacement transformer
 

Eeyore wrote:

Find your local electrician's supply shop. And explain properly and in detail your problem. You may
actually have 'iffy' wiring because since it's the UK that *should not* happen on account of UK wiring
being probably to the best standard in the world. You probably need a proper electrical test and
certification if switching on a TV set can **** things up. Wouldn't surprise me in the USA though.

The wiring in this place is pretty old. There's still some old sockets
with round connectors dotted around the place, but I don't think they're
wired up.

Replacement transformer
 

In article , Anton Gÿsen
wrote:
Jim Lesurf wrote:

Since you have a 'wall wart' you could fit a shunt RF capacitor and
some ferrite beads to the lead from wall wart to the DAC. This would
be cheaper than buying an enclosed filter block, but requires you to
be able to solder, etc. You'd also need to know enough to choose
suitable components.

It does have a ferrite loop on it.

I was thinking of individual beads on each of the wires, followed (i.e. on
the DAC side) by an RF cap between the wires. Having just a series ferrite
increases the RF impedance and losses along the wiring, but that doesn't
always ensure good suppression. Indeed, might act as an antenna in some
situations. :-)

If the ferrite is something like a clip-on 'box' or a loop you can unthread
without damaging the wires it might be worth experimenting and seeing if
taking it off makes any difference. But if you aren't bothered by the
intereference I'd recomment not bothering if it would mean haveing to
rewire at all. If the interference is mains conveyed a filtered
distribution block will probably help, and will give you a mains switch if
you choose the right design. See something like the CPC catalogue for
examples.

Slainte,

Jim

--
Change 'noise' to 'jcgl' if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Replacement transformer
 

In article , Eeyore
wrote:


Eiron wrote:

Eeyore wrote:
Jim Lesurf wrote:
Eeyore wrote:
Serge Auckland wrote:
If you want to add an on-off switch, then why not make a small
mains extension, and put a torpedo switch near the socket
I think 'torpedo' switches are now illegal...
That seems unlikely. I bought one a few weeks ago, and IIRC the CRC
leaflet I just got advertises them.

Crikey !

Care to give a link ? I wouldn't touch one with a bargepole !

http://www.maplin.co.uk/Module.aspx?ModuleNo=13156

I don't see any safety approval mark.

If you are concerned that Maplin are selling illegal equipment then I'd
recommend you ask them and check before you decide to report them to
Trading Standards.

Slainte,

Jim

--
Change 'noise' to 'jcgl' if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Replacement transformer
 

Anton Gÿsen wrote:
Adrian C wrote:

I want to be able to switch things on and off independently, i.e. I
don't want my DAC on when my FM tuner is on.

Well, that's my solution... Yes, it has that flaw. Tiny IMO.

OK, How about using remote control? eBay item 140272513313


BTW You do know the audiophool religion is to run things like DAC's 24
hours a day? If you turn them off, you have to run a excruciating
high-volume white noise burn-in cycle again before you can start
enjoying music again?

;-)

--
Adrian C

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Eeyore wrote:
Jolly good for you. You could use a clockwork one too.

MORON !


Oh dear, is this Phil Addison having taken over Graham's body?

:-)

--
MORON

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Eeyore wrote:

Do you know what Y Caps are and where they're used ?

Not to mention HF noise on PC PSU outputs that'll whistle through a
standard regulator.


I wasn't serious. I know a PC power supply is a bit of a silly
suggestion. I was baiting the OP. He recognised that and responded
appropiately. ;-)

You and Phil both fell, hook, line and sinker? Don't be so quick off the
keyboard or you will either have another "zippers and rabits" thread or
end up like me, spelling Phil's surname wrong....

(Gonna get flamed for that from the man in the long johns and socks)

:-)

--
Adrian C

Replacement transformer
 

"Eeyore" wrote in message
...


Serge Auckland wrote:

"Eeyore" wrote
Serge Auckland wrote:
"Anton Gÿsen" wrote
Serge Auckland wrote:

A mains filter will cost a few pounds/euros. You're not thinking of
an
audiophile one are you? That's a £â,¬5 part in a £â,¬ 50 box with
a
壉, 1000
price tag.

I can only find the audiophile ones. Would you kindly show me where
I
can get one a lot cheaper than that?

http://cpc.farnell.com/FT00727/compo...ts-fe-sc-ca-sw

£ 3.63 including VAT.

You just need to wire that to the plug on your DAC or to the item
which
causes the glitch, or just to a plug and plug it in to the mains strip
the
DAC is on or the offending item . I had the same problem with a fridge
many
years ago, and one of these fixed the problem perfectly.

Illegal to fit that except INSIDE equipment by a professional. Would
invalidate any house insurance.

See the 'Low Voltage Directive'.
http://ec.europa.eu/enterprise/elect...t/lv/index.htm
http://eur-lex.europa.eu/LexUriServ/...10:0019:EN:PDF
http://www.bsi-global.com/en/Product...age-Directive/

Thanks for that. I did it when the EU was still called the Common Market,
and EU directives were a distant gleam in a bureaucrat's eyes. Worked
fine
though.

You'll have to remove it now though if it's external !

Graham


That was many years ago, two fridges have been and gone since then. However,
it doesn't need a foo box costing hundreds to do the job.

S.
--
http://audiopages.googlepages.com

Replacement transformer
 

Anton Gÿsen wrote:

But I don't care about the drop-out in sound when I switch my TV on.

So why are you whining about it ?


I do pull the plug but it's a drag... I'd rather a physical power switch
in an accessible place.

About 45 mins ago I was using a '4 way extension' with individual power switches.
Too much trouble for you to find one ?


It does have a ferrite loop on it.

That has NOTHING to do with it.

Graham

Replacement transformer
 

Anton Gÿsen wrote:

I want to be able to switch things on and off independently, i.e. I
don't want my DAC on when my FM tuner is on.

Then buy a switchable 4 way extension like the one I was talking about !

Can you use Google and/or Ebay ?

Graham

Replacement transformer
 

Anton Gÿsen wrote:

Eeyore wrote:
Anton Gÿsen wrote:
Eeyore wrote:

So does your body consume energy. Considered fitting an on/off switch on yourself
?
What kind of question is that?

More meaninful than yours. Do you know how much energy the body uses on 'standy' ?
Around 100W.

Seeing as the body is always perorming essential functions, your
argument is daft, especially as you are comparing a complex biological
entity to an electronic circuit.

Saving ~ 2W is daft in my book.

Graham