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Dragon 32 power supply woes


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#1 TheDash OFFLINE  

TheDash

    Space Invader

  • 34 posts
  • Location:London

Posted Thu Jan 25, 2018 3:38 AM

I've given up on getting a replacement psu for the Dragon. Unless anyone can give me a quick pointer right now.

 

Question - has anyone 'made' a power supply for this odd 8bit voltage consumer? It needs at least 2 inputs of 8.5vAC and 28(!)vAC, at 1.5a and 250ma - pinned in via a 9pin D type or 'Atari joystick' connector. I'm very close now to wiring in as many individual transformers as it takes - and maleesh the condy's**.

 

Unless anyone has a better idea?

 

** excuse the Australian Army slang.



#2 MarkO OFFLINE  

MarkO

    Dragonstomper

  • 912 posts
  • Location:Albany, Oregon, USA, North Western Hemisphere, Planet Tera

Posted Mon Jan 29, 2018 1:59 PM

IIRC, Dragon 32s were only available in the UK..

Have you contacted any of the UK Dragon user about a spare Power Supply or Work Arounds???


There is a Facebook Group and a forum at World of Dragon...


MarkO

#3 Quickie OFFLINE  

Quickie

    Combat Commando

  • 5 posts

Posted Thu May 17, 2018 8:24 AM

IIRC, Dragon 32s were only available in the UK..

Have you contacted any of the UK Dragon user about a spare Power Supply or Work Arounds???


There is a Facebook Group and a forum at World of Dragon...


MarkO

 

What a pitty that nowadays some classic computer groups are using Facebook instead a forum. I hate Facebook, but I found it specially annoying for topics or hobbies like retrocomputing.

Anyway, fortunately enough there is a relatively easy way to build a Dragon32 psu detailed on a public website -> http://archive.world...wer_supply_unit

 

In essence is just wiring a toroidal transformer to the proper DB9 Dragon32 PSU pinout and to 220V.

The problem is that this implies some work (create a box to acommodate the transformer + wiring) and it isn't cheap at all.

 

Hope having helped.

 

I'm in the exact same situation and I will finally go for a toroid transformer as my Dragon PSU PT 48290 is giving just 4,5VAC on both SEC I and II :(

Haven't tried yet to open the PSU, but I don't want to break it (it's sealed with some metal clips).


Edited by Quickie, Thu May 17, 2018 8:25 AM.


#4 ColorComputerStore OFFLINE  

ColorComputerStore

    Star Raider

  • 93 posts
  • Location:USA

Posted Sat Jun 2, 2018 6:22 PM

Wonder if you can get specs of Tank Dragon and base a new schematic on that.




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