Need original Amiga power supply ratings

[Stedy]

Hi,

I'm updating my Amiga power supplies guide, http://www.ianstedman.co.uk/Amiga/am..._supplies.html
and I would like to add some information on the original Amiga power supplies.
This is the information I have so far, any additions or corrections appreciated. am I correct in listing only the A1000, A2000 and A3000 as requiring a 'Tick' circuit?

Stock Amiga power supply ratings
All figures are the maximums

A500/A600/A1200
Taken from labels on the actual PSU.
+5V 2.50 to 4.50A (one model of lightweight PSU has highest current rating!)
+12V 0.50/1.00A
-12V 0.10A

CD32

+5V 2.00A
+12V 0.50A

A1000
(+ tick circuit)
A1000 PSU schematics available.
Emails provided information.

Note: requires -5V and does not have -12V. Use 7905 linear regulator.

+5V 8.00A
+12V 1.00A
-5V 0.25A

A2000
(+ tick circuit)
Emails provided information
+5V 20.50A
+12V 8.00A
-5V 0.30A
-12V 0.30A

A3000
(+ tick circuit)
130W PSU?
+5V
+12V
-5V
-12V

A4000
Information taken from A4000 PSU schematics
+5V 10.00A
+12V 4.00A
-12V 0.40A


A4000T
Information taken from A4000T specifications
+5V 25.00A

+12V 10.00A
-5V 0.30A
-12V 0.30A


Has anyone got reliable information on the original power supply connectors?

Ian

[Lord Aga]

Well... all I can do is confirm the A500/A600/A1200 PSU numbers

Hi Stedy, all I can confirm is that the A1500/A2000 does require the TICK, but you can change the jumper on the motherboard to correct this.

Many new type ATX PSU's do not incorporate a -5V supply that is required for A1500/A2000. As you suggest a 7905 regulator connected to the -12V supply & Ground will give the required -5V.

I have installed a new 500W ATX PSU into the old PSU case on my A1500 and used the original Amiga wiring, so that it all looks original.

I can post some pictures if anyone is interested?

[prowler]

Originally Posted by Jagcats

I have installed a new 500W ATX PSU into the old PSU case on my A1500 and used the original Amiga wiring, so that it all looks original.

I can post some pictures if anyone is interested?

Yes please, Jagcats! Welcome to EAB!

Pictures of hardware mods are always an interesting addition to Amiga forum threads.

Go for it!

[roy bates]

i have a heavy a500 power supply rated at 60watts

+5 volts 4.3 amp +12 volts 1 amp -12 volts 0.1 amp.

[Stedy]

@Jagcats,

Thanks for confirming the information on the tick signal. Have added that to the Amiga PSU guide update, which will be published shortly.
Please publish any power supply modifications, if they are safely done, they inspire others.

@roy bates
Sorry to break it to you but your A500 PSU is only 34.7W. It the label states 60W, that's the total power consumption, 60W in, 34.7W out @ 58% efficiency, when at full load.
+5V @ 4.3 Amp = 21.5W
+12V @ 1 Amp = 12W
-12 @ 1 Amp = 1.2W
Total 34.7W

Bye,

Ian

[roy bates]

yep, thats right. 60 watts in at 240 volts at 50 hertz.

thats why it was on a seperate line and the voltages out on another.