Laurence Payne wrote:
On Mon, 11 Jan 2010 16:20:29 +0000, bcoombes bcoombes@orangedotnet
wrote:

Yeah but the point is it only happened after he installed a new psu so the
problem is probably an el cheapo psu...we've discussed the limitations of very
cheap psu's ad nauseum in uk.comp.homebuilt and I suspect this is another of
them.

Still worth checking everything else though. When the computer box
was pulled out for psu transplant SOMETHING may have been re-connected
differently - maybe a cable that was realised to be redundant? That
may have been the very one that stabilised the grounding system!

You are absolutely right in that respect but I'd still replace the psu with
something decent first.

--
Bill Coombes

Hi, you are indeed right, its one of those times when the fact that it does
what it says on the tin, is not enough. If I put a portable radio on medium
wave on a clear channel, when I switch the machine on, the same or similar
whining gurgling is heard. Other machines here have little radiation at all.


Oh well, I have another one here somewhere!

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"bcoombes" bcoombes@orangedotnet wrote in message
o.uk...
Laurence Payne wrote:
On Mon, 11 Jan 2010 16:20:29 +0000, bcoombes bcoombes@orangedotnet
wrote:

Yeah but the point is it only happened after he installed a new psu so
the problem is probably an el cheapo psu...we've discussed the
limitations of very cheap psu's ad nauseum in uk.comp.homebuilt and I
suspect this is another of them.

Still worth checking everything else though. When the computer box
was pulled out for psu transplant SOMETHING may have been re-connected
differently - maybe a cable that was realised to be redundant? That
may have been the very one that stabilised the grounding system!

You are absolutely right in that respect but I'd still replace the psu
with something decent first.

--
Bill Coombes

Brian Gaff wrote:
Hi, you are indeed right, its one of those times when the fact that it does
what it says on the tin, is not enough. If I put a portable radio on medium
wave on a clear channel, when I switch the machine on, the same or similar
whining gurgling is heard. Other machines here have little radiation at all.


Oh well, I have another one here somewhere!

Brian


Yeah I've heard that the Iranians jam BBC radio simply by powering up a 1000 low
end Chinese PSU's.

--
Bill Coombes

Nice to know where to send it then....grin.

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"bcoombes" bcoombes@orangedotnet wrote in message
...
Brian Gaff wrote:
Hi, you are indeed right, its one of those times when the fact that it
does what it says on the tin, is not enough. If I put a portable radio on
medium wave on a clear channel, when I switch the machine on, the same or
similar whining gurgling is heard. Other machines here have little
radiation at all.


Oh well, I have another one here somewhere!

Brian


Yeah I've heard that the Iranians jam BBC radio simply by powering up a
1000 low end Chinese PSU's.

--
Bill Coombes

As an adjunct to this thread. I noticed a strange thing today. The machine
with this noisy supply makes less noise, at least on the soundcard if you
take out the two ramsticks attached to its usb ports. This is particularly
noticable on the one plugged into the front port, presumably the wiring for
this is a lot longer.

So it sounds like the decoupling and conditioning of the supplies is even
more crap than at first thought by me!

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"bcoombes" bcoombes@orangedotnet wrote in message
...
Brian Gaff wrote:
Hi, you are indeed right, its one of those times when the fact that it
does what it says on the tin, is not enough. If I put a portable radio on
medium wave on a clear channel, when I switch the machine on, the same or
similar whining gurgling is heard. Other machines here have little
radiation at all.


Oh well, I have another one here somewhere!

Brian


Yeah I've heard that the Iranians jam BBC radio simply by powering up a
1000 low end Chinese PSU's.

--
Bill Coombes

Brian Gaff wrote:
As an adjunct to this thread. I noticed a strange thing today. The machine
with this noisy supply makes less noise, at least on the soundcard if you
take out the two ramsticks attached to its usb ports.


Can't be, ram only goes in dedicated mobo slots. (or occasionally for ramdrives
on a pci card) AFAIK there's absolutely no way to attach ram via USB.. for
starters usb access is waaay too slow for that.. did you mean something else?

--
Bill Coombes

bcoombes wrote:
Brian Gaff wrote:
As an adjunct to this thread. I noticed a strange thing today. The
machine with this noisy supply makes less noise, at least on the
soundcard if you take out the two ramsticks attached to its usb ports.


Can't be, ram only goes in dedicated mobo slots. (or occasionally for
ramdrives on a pci card) AFAIK there's absolutely no way to attach ram
via USB.. for starters usb access is waaay too slow for that.. did you
mean something else?


Sorry, I've read your post properly again [with brain engaged]. You removed two
chips *on the sound card* and that quietened it from a 'radio-active' point of
view? Hmm, interesting I've got a couple of cheap soundblaster cards lying
around, I'll have a look. I doubt if the chips you removed were 'ram' as such,
more likely to be the rom chips that are used to permanently hold a whole bunch
of stuff. [I'm not splitting hairs here, just replying to my own post really.]
It *is* very interesting that they quietened the card.

--
Bill Coombes

On Wed, 13 Jan 2010 16:23:25 +0000, bcoombes bcoombes@orangedotnet
wrote:

As an adjunct to this thread. I noticed a strange thing today. The
machine with this noisy supply makes less noise, at least on the
soundcard if you take out the two ramsticks attached to its usb ports.


Can't be, ram only goes in dedicated mobo slots. (or occasionally for
ramdrives on a pci card) AFAIK there's absolutely no way to attach ram
via USB.. for starters usb access is waaay too slow for that.. did you
mean something else?


Sorry, I've read your post properly again [with brain engaged]. You removed two
chips *on the sound card* and that quietened it from a 'radio-active' point of
view? Hmm, interesting I've got a couple of cheap soundblaster cards lying
around, I'll have a look. I doubt if the chips you removed were 'ram' as such,
more likely to be the rom chips that are used to permanently hold a whole bunch
of stuff. [I'm not splitting hairs here, just replying to my own po

You're being too clever AGAIN.

On Wed, 13 Jan 2010 15:41:39 +0000, bcoombes bcoombes@orangedotnet
wrote:

As an adjunct to this thread. I noticed a strange thing today. The machine
with this noisy supply makes less noise, at least on the soundcard if you
take out the two ramsticks attached to its usb ports.


Can't be, ram only goes in dedicated mobo slots. (or occasionally for ramdrives
on a pci card) AFAIK there's absolutely no way to attach ram via USB.. for
starters usb access is waaay too slow for that.. did you mean something else?

You may be too clever for your own good! Plug a memory stick into a
modern Windows system, you get asked whether you want to use it as
system memory. Not quite RAM, but close.

Laurence Payne wrote:
On Wed, 13 Jan 2010 15:41:39 +0000, bcoombes bcoombes@orangedotnet
wrote:

As an adjunct to this thread. I noticed a strange thing today. The machine
with this noisy supply makes less noise, at least on the soundcard if you
take out the two ramsticks attached to its usb ports.

Can't be, ram only goes in dedicated mobo slots. (or occasionally for ramdrives
on a pci card) AFAIK there's absolutely no way to attach ram via USB.. for
starters usb access is waaay too slow for that.. did you mean something else?

You may be too clever for your own good! Plug a memory stick into a
modern Windows system, you get asked whether you want to use it as
system memory. Not quite RAM, but close.

Ah yeah, M$'s wonderful 'ReadyBoost'. can make matters worse see
http://www.mpieters.com/2007/01/read...benchmark.html
It ain't equal to 'real' RAM but if you are trying to run Vista on very low RAM
(512k) it's just about better than nothing sometimes.
It is not however anything like the equivalent of adding mainboard RAM.


--
Bill Coombes