More power for a 1200 (and 4K)

[xaccrocheur]

I bumped into another readme regarding the fitting of an old AT PSU to a 1200.

this link

My question is : If I use a 3.5' HD in (or out of) the 1200, how can I power the drive THRU the MoBo, to avoid an additionnal cable to be dangling from the side ?

since it HAS a power plug, unlike the 2.5 HDs... Where should I plug this latter power plug on the MoBo ?

Thank you

pX

[xaccrocheur]

Karlos wrote:
Before getting a  tower, I used an old PC supply.
I was worried about the current levels that would pass through the standard A1200 power socket, so I fitted an additional one.
I used a standard male hard disk power connector (from maplins), fitted into the back of my A1200, having cut a wee hole with a hacksaw and used a bit of super glue. I then powered the floppy disk/hard disk from this socket, and later added an additional feed to the mainboard via the original floppy power connector (be careful of the pin arrangement else you'll pump 12VDC into the 5VDC line!)
The upshot was that I had 2 power leads going into my A1200, both of which needed to be pugged in else it wouldn't work ;-)
This worked perfectly as a temporary fix until I got a tower.

Sounds fine, that's what I envisioned in the 1st place. On the other hand GreggBz's solution is much more elegant : That way you only have 1 cable.

thanks for the options !

Now I'm wondering, this time on my 4000, can I plug *that* much items init ?

A4040 w/ orgiginal DaughterBoards
GVP HC+8 Ser.II Rev.II (has a PSU socket, drains it from the ZII port)
TEAC SCSI CD-ROM (x32 I guess)
Original HD FLoppy drive
Conner CP30540 520 Mg SCSI HD (came w/ the machine I guess, am I correct ?)
IBM DDRS-HG 4560Mg SCSI HD
Seagate Hawk ST15230N (the BIG one, server stuff, double the thickness and heavy metal case)

The two latter disks are not mounted yet, since I'm quite concerned about power issues. I don't want to be losing data by corruption or long stress-inducing revalidations...

pX

[xaccrocheur]

miles wrote:
I'm running the standard 135 Watt PSU on my 3000 and have 4 Zorro
cards, 2 HDDs, 1 cd rom, HD FDD, CS060 plugged in with no ill effect
on the power.  I have had 2 more HDDs and another cd and a cd-r
plugged into this system as well in the past, probably pushing the PSU
to the point I would not have added anything else :-)  You should not
have a problem with your PSU.

Wow, indeed, that's reassuring. But then again, you have a 3K (lucky bastard) because my A4K's PSU reads "Output : 45W" witch is scary : I have a 250W PSU in one of my LinBoxes, is it really 3 times more powerful ? Or does the notation of those voltage are as serious as, say, the size of the monitors ? :-P

pX

[xaccrocheur]

Can somebody confirm that the A4K PSU is only 45W, whereas for example, that of the 3K is 135W, and that of a basic PC is at least 200W...

That would place the A4K PSU just above "the brick", the tiny toyesque A1200 PSU...

Anyway I'm very concerned that it could not cope with the amount of W needed to fully operate my 3 big SCSI drives...

How can I make this sure ? the Electric specs are not even stated on one of the drives, the BIG Seagate HAWK...

Well, if somebody has his 4000 as crowded as this, please drop me a line to reassure me ;-)

pX