Jump to content

Photo

Replacement Power Supply for Atari 8XX gear

800 810 835 850

3 replies to this topic

#1 fibrewire OFFLINE  

fibrewire

    Stargunner

  • 1,625 posts
  • Location:Southern California

Posted Thu Aug 2, 2012 1:09 PM

Too many power supplies everywhere. I have 12+ plugs for my Atari and half are for the low voltage stuff. Can't I just run all the 9 volt gear off one 9VAC 3.4 Amp Atari brick?

Alternative solutions?

eBay Auction -- Item Number: 251020503191

Attached Thumbnails

  • XP-625 AC-DC variable power supply.jpg


#2 bob1200xl OFFLINE  

bob1200xl

    River Patroller

  • 2,624 posts

Posted Thu Aug 2, 2012 3:30 PM

I wouldn't... The way Atari designed things each device is isolated from the 120vac with a transformer. When we interconnect our devices, we don't have to worry about ground loops and such, or how we connect commons. If you run more than one device on a single transformer, those isolations may be lost.

Yes, I know -- there are a thousand anecdotes about people doing what I would advise you not to do...

It's a matter of value/cost.

Bob

#3 fibrewire OFFLINE  

fibrewire

    Stargunner

  • Topic Starter
  • 1,625 posts
  • Location:Southern California

Posted Thu Aug 2, 2012 4:03 PM

Each output is isolated and short-circuit protected, and each output is rated up to 1200mA - is that enough power?

http://www.stompin-g...s/sgpowerac.htm

Attached Thumbnails

  • ppac750.jpg

Edited by fibrewire, Thu Aug 2, 2012 4:23 PM.


#4 BillC OFFLINE  

BillC

    Stargunner

  • 1,911 posts
  • Location:BC Canada

Posted Thu Aug 2, 2012 8:13 PM

Each output is isolated and short-circuit protected, and each output is rated up to 1200mA - is that enough power?

http://www.stompin-g...s/sgpowerac.htm

1.2A @9VAC would be marginal for a 400/800 or any of the Atari FDD, probably fine for an 850. I blew the fuse in an OEM 400 15VA 9VAC(1.67A?) Atari power supply after I upgraded it with a Mosaic 64K board in 1982/83, I believe this upgrade board has 32 4116 ICs. This power supply also isn't recommended for use with the 810/1050/XF551 FDDs due to their power requirements for spinning the disk. Atari later stopped shipping the 15VA power supply with the 400, replacing it with the 31VA model. While the 3.4A of the 31VA supply may be more than required I would recommend a minimum of at least 2A. preferably 2.5A.





Also tagged with one or more of these keywords: 800, 810, 835, 850

0 user(s) are browsing this forum

0 members, 0 guests, 0 anonymous users