PSU (power supplies)

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How to: recapping the Mega STe power supply

Last post by Peter_John48115 « Thu Apr 12, 2018 7:04 pm
Replies: 15
by Pacman » Mon Oct 16, 2017 11:41 pm
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I recently decided to replace all the electrolytic capacitors (recap) in my Mega STe power supply (Phihong PSM-5341) as a safety measure, considering...
15 Replies

1389 Views

Last post by Peter_John48115
Thu Apr 12, 2018 7:04 pm
NEW MSTE/TT & ST PSU ? (well not really)

Last post by troed « Thu Apr 12, 2018 5:00 pm
Replies: 1
by exxos » Thu Apr 12, 2018 2:41 pm

As many know I created alternative power supplies for the STF/E/Falcon. About once a week I get asked if I will design a new MSTE PSU. Basically the...

1 Replies

119 Views

Last post by troed
Thu Apr 12, 2018 5:00 pm
WHAT PSU CAPACITORS SHOULD I USE ?

Last post by exxos « Fri Aug 18, 2017 8:26 pm

by exxos » Fri Aug 18, 2017 8:26 pm

This is a question I get asked almost daily...

Before I explain some things, please considering buy the capacitors kits from my webstore if I sell...

0 Replies

343 Views

Last post by exxos
Fri Aug 18, 2017 8:26 pm
ATARI ST PSU CAPACITOR & UPGRADE INFORMATION

Last post by exxos « Fri Aug 18, 2017 8:21 pm

by exxos » Fri Aug 18, 2017 8:21 pm

Work I started in 2012 and spanning now 5 years later. I have been researching and offering replacement kits and advise to people with Atari PSU's....

0 Replies

458 Views

Last post by exxos
Fri Aug 18, 2017 8:21 pm
TT/Mega STE power supply headaches

Last post by damanloox « Sun Apr 22, 2018 3:28 pm
Replies: 31
by damanloox » Mon Apr 16, 2018 9:05 pm
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I've been trying to find the issue that I have with my TT (or PSU specifically)... Long story short (exxos knows the details as I have been bothering...
31 Replies

291 Views

Last post by damanloox
Sun Apr 22, 2018 3:28 pm
MSTE PSU RE-CAP FAIL

Last post by exxos « Mon Apr 16, 2018 7:20 pm
Replies: 3
by exxos » Fri Oct 20, 2017 1:57 pm

I had this power supply sent in for repair as after it was recapped , it failed to function correctly.

Upon arrival I saw that the capacitor legs...

3 Replies

377 Views

Last post by exxos
Mon Apr 16, 2018 7:20 pm
TT PSU problems

Last post by Steve « Sun Apr 15, 2018 10:00 am
Replies: 3
by Steve » Sat Apr 14, 2018 3:24 pm

Hi,

My TT PSU seems to be outputting 7.5v from the red wire, and 0v from the yellow on the molex connector. This is whether the PSU is connected to...

3 Replies

267 Views

Last post by Steve
Sun Apr 15, 2018 10:00 am
Discharging capacitors, PSU-testing with dummy loads

Last post by exxos « Fri Apr 06, 2018 5:16 pm
Replies: 23
by Pacman » Tue Aug 29, 2017 12:05 pm
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I have two questions concerning before and after recapping an Atari PSU:

1) what is the safe and proper way to discharge a (high voltage) capacitor...
23 Replies

1983 Views

Last post by exxos
Fri Apr 06, 2018 5:16 pm
Future PSU designs

Last post by exxos « Mon Mar 26, 2018 12:36 pm
Replies: 29
by exxos » Sun Sep 24, 2017 2:00 am
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As many know I designed my own PSU..

Though soldering the regulators is no fun :roll:

I have been looking around and found a soic8 regulator...
29 Replies

2274 Views

Last post by exxos
Mon Mar 26, 2018 12:36 pm
TT MEGA STE PSU SCHEMATICS DEGRAIN

Last post by exxos « Thu Mar 15, 2018 11:51 am
Replies: 4
by simbo » Tue Mar 13, 2018 10:35 pm

HI ALL
i found the psu schematics for the TT to be vary bad
so i sympathetically restored it
and here it is
the zip contains an exported jpg from...

4 Replies

247 Views

Last post by exxos
Thu Mar 15, 2018 11:51 am
Video problem on STE

Last post by exxos « Tue Mar 13, 2018 7:12 pm
Replies: 6
by Strider » Mon Mar 12, 2018 9:32 pm

Hello,

Yesterday I've recapped the PSUs of my 2 STEs.
I attached a photo, the PSUs have been controlled before starting the STEs.

However I have...

6 Replies

285 Views

Last post by exxos
Tue Mar 13, 2018 7:12 pm
Atari Falcon PSU

Last post by exxos « Sun Mar 11, 2018 5:03 pm
Replies: 10
by st graveyard » Sun Mar 11, 2018 10:01 am
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Hello all,

I'm pretty new to the Falcon. I was in the middle of installing a CF card reader when I noticed the following. I seem to have a leaking...
10 Replies

274 Views

Last post by exxos
Sun Mar 11, 2018 5:03 pm
exxos PSU dual voltage inputs (110V & 230V) why i'm not doing it..

Last post by exxos « Thu Mar 08, 2018 9:54 am

by exxos » Thu Mar 08, 2018 9:54 am

In light of some discussions about dual voltage power supplies, I need to explain why I am not going to be supporting dual voltage power supplies in...

0 Replies

168 Views

Last post by exxos
Thu Mar 08, 2018 9:54 am
Atari 520ST Power Brick PSU

Last post by Icky « Sun Mar 04, 2018 11:24 pm
Replies: 6
by Icky » Thu Mar 01, 2018 4:00 pm

Finally I got my hands on an Atari 520ST power brick. A rather large piece of plastic.

I now have a new project for this weekend to clean up and pop...

6 Replies

302 Views

Last post by Icky
Sun Mar 04, 2018 11:24 pm
Designing PSU: PSU Curent Limit Latching issue

Last post by exxos « Thu Dec 21, 2017 9:41 am
Replies: 1
by kuaile » Thu Dec 21, 2017 7:33 am

Hi to all, I'm recently design PCU,there are questions for circuit need to solution. I have to say it's complex for me because I have no experience...

1 Replies

206 Views

Last post by exxos
Thu Dec 21, 2017 9:41 am
PSU failure images

Last post by exxos « Fri Nov 24, 2017 1:44 pm
Replies: 1
by exxos » Wed Nov 22, 2017 8:28 am

Submit your Atari PSU blow up images here :)

cap-blow.jpg
Image by John Leonard.

1 Replies

235 Views

Last post by exxos
Fri Nov 24, 2017 1:44 pm
Arcing in Mega STe PSU

Last post by exxos « Sun Nov 12, 2017 9:39 pm
Replies: 27
by Pacman » Thu Oct 19, 2017 9:00 pm
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Having just recapped my Mega STe power supply successfully ( I wrote a how to here ) I noticed some electrical arcing spots right underneath where...
27 Replies

1779 Views

Last post by exxos
Sun Nov 12, 2017 9:39 pm
Re-Cap or Replacement for Atari TT PSU

Last post by Icky « Sat Nov 04, 2017 7:31 pm
Replies: 6
by Icky » Thu Oct 05, 2017 4:07 pm

The work exxos is doing on PSUs for the Atari ST and Falcon are admirable. It helps us to prolong the life of these old machines. However I was...

6 Replies

540 Views

Last post by Icky
Sat Nov 04, 2017 7:31 pm
[pics] 4,700 AXIAL CAP REPLACEMENT

Last post by Steve « Mon Oct 23, 2017 3:01 am
Replies: 3
by spiny » Sun Oct 22, 2017 9:02 pm

A few more pics from this evening - managed to find some time to do atari stuff :)

This is the cap replacement kit for the big cap that lives on FM...

3 Replies

422 Views

Last post by Steve
Mon Oct 23, 2017 3:01 am
Mixing different PSU valued capacitors

Last post by Pacman « Mon Aug 28, 2017 11:39 pm
Replies: 2
by Pacman » Mon Aug 28, 2017 11:59 am

First off, congrats on your forum, Exxos! You've done a great job :D
A treasure worth of information!

I read through your Atari ST PSU capacitor...

2 Replies

342 Views

Last post by Pacman
Mon Aug 28, 2017 11:39 pm

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