[Coco] CoCo2 26-3134A with 230V~ ???

[Jens]

Did anyone know a power supply solution for a CoCo2 26-3134A with 230V~ ?

In 
http://www.colorcomputerarchive.com/coco/Documents/Manuals/Hardware/Color%20Computer%202%20Service%20Manual%20%28Tandy%29.pdf 
i found some informations:

* power transformer provides 17,2 VAC, center-tapped, ad 1.8 amps RMS
* -5V are only for RS-232C and not used anywhere else.

Must i have a transformer with AC output? Or can i use a Switching Supply 
solutions with DC output?
What ampere is needed for +5V and -5V ?

It's seems that a power supply with -5V is hard to find.
I found theses Switching Supply solutions:

* MeanWell PD-2505: 25W 5V/2.5A -5V/2.5A
* MeanWell RT-65A: 66.1W 5V/6A 12V/2.8A -5V/0.5A
* RECOM Power RAC10-05DC/277: +5V/1A -5V/1A
* TDK-Lambda KMD15-55: +5V/1.5A -5V/1.5A

But they are not really cheap and it seems that i can't buy every of them easily 
in germany.

The MeanWell RT-65A costs ~20€

Maybe a simple transformer is cheaper... I found this:

* Block NT 12VA 2X6: 2x6V 12VA 1,08A - 11€
* Block EL 54&18,8 : 2x6V 16VA 1,3A - 7€
* Block EL 18/6    : 2x6V 18VA 1.5A - 16€
* Weiss UL 506     : 2x6V 18VA 1.5A - 7€
* Block EL 60/25,5 : 2x6V 25VA 2A - 9€



Am 06.10.2014 um 09:15 schrieb Camillus Blockx:
> you need a transformer 240 v Prim / 9 V AC SEC with a center pin .
>
> lead 1        = pin1
> centerpin   = pin 2
> lead 2        = pin 3
> On 10/6/2014 2:05:58 AM, Jens <cocolist at jensdiemer.de> wrote:
>
> My CoCo 2 26-3134A is there. (Thanks to Tim!)
>
> Now i need information about the power supply. I need a way to use the CoCo with
> 230V~...
>
> On the Mainboard i see the A1, A2 and A3 pins. (The transformator was removed to
> save weight.)
> What voltages and polarity is needed there?!?
>
>
> Where can i find the needed information?
>
>
> --
>
>
> Mfg.
>
> Jens Diemer
>
>
> ----
> http://www.jensdiemer.de
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>
>
> ---
> This email is free from viruses and malware because avast! Antivirus protection is active.
> http://www.avast.com
>


-- 


Mfg.

Jens Diemer


----
http://www.jensdiemer.de