Is there any interest in new Amiga 3000D and 4000D power supplies?

[Amigaz]

mmm...the A3000D sure is noisy, when turned on it sounds more than my Dual Xeon PC which has 5 fans in it  :-o

[patrik]

@AMIGAZ:

Even with the stock psu, you can can often lower temperatures inside the A4000D quite a bit if you remove unused Zorro backplates and clean up amongst the cabling and expansions.

Or you can ofcourse go even further , check this link for an example.


/Patrik

[Amigaz]

@Patrik

Have one Zorro slot free and the backplane gone there and alo a floppy drive cover is gone on the front so I guess I´ve done what I can, which i had a rounded 50pin SCSI cable which would improve the airflow inside.
Haven´t found a place yet which sells them.

[Tahoe]

I´ve done what I can, which i had a rounded 50pin SCSI cable which would improve the airflow inside.
Haven´t found a place yet which sells them.

They are not that difficult to find, at least not here in Holland. This place sells them for instance: clickety click!

[melott]

I would probably buy 1 or 2, I have 2 A3k's (my wife's and
mine).
I was looking for a PSU for an A3k that I was trying to
repair, Centsable Software was the only place I could find
one and it was used and pricey.
New PSU's at a reasonable price would be a WELCOME addition.

[Amigaz]

@Tahoe

Just did the clickety click! hehe
Feels like a 1 meter cable will wriggle in the case like a big snake, hehe
Have to find a shorter one, 60cm would be great.
Seems like SCSI is a dying thing here in Sweden, more and more shops have stopped selling SCSI drives and accesories.

[amigadave]

@x56h34,

I think you have a good idea here and it will serve the Amiga community to have these higher wattage, more efficient, better cooling PSU's available.  Given what you wrote on how you plan to accomplish this task, why not try to find as many dead or dying A3000 & A4000 PSU's and take them apart to use the housings again.  Then offer a discount to those buyers who send in their old PSU's so you will have a constant suppy of original PSU cases to do your conversions.

If reasonably priced, you can count on me to buy a couple of each, I currently have 3 of each A3000D & A4000D, but doubt that I will be keeping more than two of each in my render farm.

Good Luck

[patrik]

@AMIGAZ:

Dont remove the floppy drive cover, that will stop air from moving inside most part of the computer. The psu will just suck more or less all the air from the closest and less "resistive" source which will be the floppy drive hole and thus the only area that will be cooled is the area between that hole and the psu fan.


/Patrik

[Amigaz]

Haven´t removed it, it was gone when I recieved the computer.
Have another A4000 case here which was the 2nd A4000 I bought which motherboard is now in my tower, the cover is gone on that one too.
I would glady buy a cover plate if someone has one for sale

[koaftder]

Are you going to fabricate your own chasis for the device, or will you require a core?

I cant immagine there being much profit for yall making powersupplies. You most likely wont sell thousands of them, and if you did you would have to outsource the pcb production and probably the assembly, as you wouldnt have time to solder all thoes diodes and caps and other things.

Even if you did setup shop in your garage and made your own pcb's, what would you do with all thoes gallons and gallons of waste ferric chloride? You have to pay to dispose of it properly.

If i remember correctly i was able to find a chemical supply company who would sell me ferric chloride in 55 gallon capacity for around $250.00 a barrel. Turns out they use lots of it in wastewater treatment plants, look for their chemical suppliers if you want to obtain the stuff.

Another good place to get the stuff is companies who sell to engravers. It can be bought in 5gal capacities for a vastly inflated price. Occasionally on ebay people will sell kilogram packages of powered material.

Ebay is a great place to find stock copper clad board.

[patrik]

@AMIGAZ:

Which plate is it - the 5.25" or 3.5" one? Btw, you could probably fabricate something quite good looking by taking a cover plate from a pc and epoxying two plastic pieces with holes in them to each side to be able to screw it there in the holes in the front.


/Patrik

[Amigaz]

It's the 3.5 inch plate which covers the lower floppy bay.
Guess it will not be a walk in the park fabricating something which has the grooves to match the ones in the case  :-o

[x56h34]

koaftder wrote:
Are you going to fabricate your own chasis for the device, or will you require a core?

New chasis would be made according to the same dimensions of the original.

I cant immagine there being much profit for yall making powersupplies. You most likely wont sell thousands of them, and if you did you would have to outsource the pcb production and probably the assembly, as you wouldnt have time to solder all thoes diodes and caps and other things.

We are both aware of that. Realistically looking at things, we'd probably be looking at around 100 sales, if that. I guess if we could break even in the end, it would be worth doing it.

Even if you did setup shop in your garage and made your own pcb's, what would you do with all thoes gallons and gallons of waste ferric chloride? You have to pay to dispose of it properly.

We would buy internals of existing ATX power supplies that could fit into the A3000D or A4000D chasis, and simply rewire them to work with A3000D and A4000D style power connectors, and neatly secure the PCBs inside the chasis so that the entire job looks clean. We would definitely not make our own internals of the PSUs from scratch. That would be too expensive.

[patrik]

@AMIGAZ:

What about mounting a floppy there as a blank to cover the hole? Or do you have one of those taller A2000-style diskdrives which doesnt allow a normal sized floppy to fit under it?

Btw, even a blank plastic cover without the grooves should look better than a hole.


/Patrik

[Amigaz]

I need one of those slim floppy drives, there's one of those mounted now.
Looks like I need to start "operation cover that hole" for better cooling  :-)

[amigadave]

x56h34 wrote:

koaftder wrote:
Are you going to fabricate your own chasis for the device, or will you require a core?

New chasis would be made according to the same dimensions of the original.

I cant immagine there being much profit for yall making powersupplies. You most likely wont sell thousands of them, and if you did you would have to outsource the pcb production and probably the assembly, as you wouldnt have time to solder all thoes diodes and caps and other things.

We are both aware of that. Realistically looking at things, we'd probably be looking at around 100 sales, if that. I guess if we could break even in the end, it would be worth doing it.

Even if you did setup shop in your garage and made your own pcb's, what would you do with all thoes gallons and gallons of waste ferric chloride? You have to pay to dispose of it properly.

We would buy internals of existing ATX power supplies that could fit into the A3000D or A4000D chasis, and simply rewire them to work with A3000D and A4000D style power connectors, and neatly secure the PCBs inside the chasis so that the entire job looks clean. We would definitely not make our own internals of the PSUs from scratch. That would be too expensive.

I can't imagine why you didn't like my idea of using existing "REAL" Amiga PSU housings, unless you think finding the cores would be too much trouble and don't think your buyers would supply you with their existing PSU's for a source of cores.

Other than fitting the ATX PSU's into the Amiga PSU housing, fitting the fan properly and switching the MoBo connectors, what PCB are you talking about?