On Sat, 30 Dec 2017 12:34:32 +0000, T i m wrote:

On Sat, 30 Dec 2017 12:24:56 +0000, Andy Burns
wrote:

T i m wrote:

I don't go straight to CPC (even though I get more catalogues though
the post than I can read)

They do seem to overdo it with the catalogues; never a week without one,
and often two ...

And if you mix them with Machine Mart, Coopers, Screwfix, Toolstation
and my subscription mags (Kitcar / Motorcycle), there is generally
plenty to browse whilst having a quiet sit down and paper to work on
when cleaning stuff etc. ;-)

You forgot Ironmongery Direct and Nisbets (here, anyway).

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Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

T i m wrote:
On Fri, 29 Dec 2017 22:18:31 +0000, Bob Minchin
wrote:

snip

Back to a 'proper' SMPSU of some sort. ;-)

Cheers, T i m

Tim Try this type

http://tinyurl.com/yad37u9v

https://www.ebay.co.uk/itm/DC-12V-LE...zaBQZFSKMFnD2g

Thanks for that Bob.

I actually have that type of PSU (12V 20A or so) in my 3D printer but
it came as part of a kit (so I didn't spec it as such).

There are lots of vendors on ebay and they possibly all come out of the
same factory.

Quite possibly. A mate had some specialised garage kit that had a
similar PSU in it that was knocked out during a lightening strike. I
found him an exact replacement online that was about 45 quid including
next day delivery ... the suppliers of the garage equipment wanted 200
for the same thing. ;-(

I've used a number for various electronic applications.

Good to know. Oh, I did help wire a couple more up used as CCTV power
supplies. ;-)

The regulation is good and the output voltage is trimmable by a few %
either way and there is no minimum load.

OOI, what sort of overhead (if any) would you set on the capacity of
such a solution?

Say I measure 3A peak on boot and 2A when running but idle, would a 5A
model be overkill?

Cheers, T i m

That sounds a sensible working margin to me Tim

Good Luck

Bob

On Sat, 30 Dec 2017 13:10:59 +0000, Bob Minchin
wrote:

snip

Say I measure 3A peak on boot and 2A when running but idle, would a 5A
model be overkill?


That sounds a sensible working margin to me Tim

Good Luck

Thanks and cheers Bob.

I think that was also basically the logic I was using with the 7A PSU.
It was offered to me and ignoring any slight inefficiency from any
potentially large overhead (not that I thought it was *actually* a
good 7A PSU), it was better that than it being underrated?

As I said, when I get a slot I'll chop the output cable off the now
dead PSU and run the server from my bench PSU that has simultaneous
displays of volts and current (and is current limitable) so I can see
if it will start up when say limited to 5A etc.

Cheers, T i m

On 30/12/2017 12:28, Andy Burns wrote:
T i m wrote:

this being the 'silly season' and Companies and postage being all
over the place etc
Element for my oven ordered Friday am, delivered Saturday am, three
other items ordered since boxing day all delivered, can't grumble.


The last time I ordered an element for an oven the MD of the company
dropped it off on the way home three hours after I ordered it and they
didn't charge the postage.

Bob Eager wrote:

T i m wrote:

Andy Burns wrote:

T i m wrote:

I don't go straight to CPC (even though I get more catalogues though
the post than I can read)

They do seem to overdo it with the catalogues; never a week without one,
and often two ...

Machine Mart, Coopers, Screwfix, Toolstation

Ironmongery Direct and Nisbets
Big Doug, ITS, Axminster

On 30/12/2017 12:09, T i m wrote:
On Sat, 30 Dec 2017 11:26:37 +0000, "dennis@home"
wrote:

snip

OOI, what sort of overhead (if any) would you set on the capacity of
such a solution?

Say I measure 3A peak on boot and 2A when running but idle, would a 5A
model be overkill?

Cheers, T i m


http://www.easyflip.co.uk/CPC_Digita...gue/?page=1732

I don't go straight to CPC (even though I get more catalogues though
the post than I can read) so thanks for that. The only thing is I
don't know what sort of quality the gear is they sell (if / how they
vet stuff) ... if it's just the same stuff found on eBay etc?

Cheers, T i m

CPC is part of Farnell. I would trust them as much as any other
reputable supplier.

For their online searchable catalogue:
http://cpc.farnell.com/

In article , Andy Burns
wrote:
Bob Eager wrote:

T i m wrote:

Andy Burns wrote:

T i m wrote:

I don't go straight to CPC (even though I get more catalogues though
the post than I can read)

They do seem to overdo it with the catalogues; never a week without
one, and often two ...

Machine Mart, Coopers, Screwfix, Toolstation

Ironmongery Direct and Nisbets
Big Doug, ITS, Axminster

Doug? Big Dug surely. and various holiday firms

--
from KT24 in Surrey, England

On Sat, 30 Dec 2017 13:43:25 +0000, Fredxx wrote:

On 30/12/2017 12:09, T i m wrote:
On Sat, 30 Dec 2017 11:26:37 +0000, "dennis@home"
wrote:

snip

OOI, what sort of overhead (if any) would you set on the capacity of
such a solution?

Say I measure 3A peak on boot and 2A when running but idle, would a 5A
model be overkill?

Cheers, T i m


http://www.easyflip.co.uk/CPC_Digita...gue/?page=1732

I don't go straight to CPC (even though I get more catalogues though
the post than I can read) so thanks for that. The only thing is I
don't know what sort of quality the gear is they sell (if / how they
vet stuff) ... if it's just the same stuff found on eBay etc?

Cheers, T i m

CPC is part of Farnell. I would trust them as much as any other
reputable supplier.

Ok. ;-)


For their online searchable catalogue:
http://cpc.farnell.com/

Cheers.

Like I was saying elsewhere, if you have a specific need / restriction
the choices can whittle down very quickly. eg, Say 12V 5A is suitable
then this looks to be a good match ...

http://cpc.farnell.com/powerpax/sw37...iec/dp/PW02363

.... except the output plug had a 2.1mm i/d hole and the current
socket on the chassis of the PC a 2.5mm o/d pin?

That's probably because the Pico ATC PSU *could* use 15+A and so the
bigger pin is used for that?

Now I know I can get an in-line adaptor (from CPC) but I don't
typically like such things, I could change the chassis socket on the
PC to be a 5.5 x 2.1mm model or replace the plug on the end of the
cable with a 2.5mm one (or cut the output cable and splice the old
plug / lead on). Or keep looking for a PSU with the right size plug?

Same problem he

http://cpc.farnell.com/pro-power/pp1...iec/dp/PW02712

http://cpc.farnell.com/pro-power/nx1...a-2/dp/PW02688

http://cpc.farnell.com/powerpax/sw44...1mm/dp/PW03040

http://cpc.farnell.com/powerpax/sw31...d-2/dp/PW02361

http://cpc.farnell.com/haydon/hay-ps...-5a/dp/PW03910

http://cpc.farnell.com/powerpax/std-...iec/dp/PW02516

http://cpc.farnell.com/ideal-power/6...vel/dp/PW03997

This one has a 2.5 mm plug but is only 2 A:

http://cpc.farnell.com/powerpax/sw41...4-2/dp/PW04232

Then we might have found something. ;-)

http://cpc.farnell.com/stontronics/t...vel/dp/PW03990

but up to £25 quid or so?

http://cpc.farnell.com/powerpax/sw43...5mm/dp/PW04100

More expensive still but is it better?

Do I need the -Ve pin on the output lead connected to earth?

Or go for the open chassis type and then really need to protect the
input connections somehow (I don't think it will fit inside the PC
PSU).

http://cpc.farnell.com/v-tac/3052/le...60w/dp/LA06836

Or this (with no info re the output plug):

http://cpc.farnell.com/unbranded/sw4...-5a/dp/LA04955

etc ... sigh

Cheers, T i m

On Sat, 30 Dec 2017 13:10:59 +0000, Bob Minchin
wrote:
snip

Say I measure 3A peak on boot and 2A when running but idle, would a 5A
model be overkill?


That sounds a sensible working margin to me Tim


Spooky eh ... I *just* got round to sorting the server and putting my
bench PSU on it to monitor the current.

It draws around 2A when idle(ish) [1] and the max I saw was just under
3A so I ordered a 'quality' 4A. ;-)

Cheers, T i m

[1] I have been running it hard since powering it up again, backing up
the two main PC's plus daughters laptop pre upgrading her 240G SSD for
a 480. ;-)