[Coco] CoCo 3 power supply

[Dave Philipsen]

Actually, I think you're right in referring to it as a 19 volt 
transformer as the 19 volts refers to an RMS voltage.  The true peak 
voltage is almost 30 volts and the peak-to-peak is almost 60 volts. 
However, you'll only read half of the RMS value on each of the outer 
ends when compared to the center tap so:

9.5VAC  -  0  -  9.5VAC

My CoCo 3 transformer reads 21 VAC across the ends and 10.5 VAC from the 
tap to either end making it a 21 VAC center-tapped transformer. Like this:

10.5VAC  -  0  -  10.5VAC

Dave



On 11/6/2017 6:49 PM, camillus gmail wrote:
> I have to check it out, if it is a 19 V or 17 V transformer, let me get back to you ok
>
> On 11/6/2017 5:39:55 PM, Dave Philipsen <dave at davebiz.com> wrote:
> So it's really a 38 VAC center-tapped transformer, then, as you describe it.
>
> Dave
>
>
> On 11/6/2017 3:20 PM, camillus gmail wrote:
>> You can use any 19 volt ac that has 1.5 to 2 amp with center tap
>>
>> That means the transformer needs to have three connections:
>>
>> 19vac - 0 - 19vac
>>
>> Best would be a round one but they are a bit expensive.
>>
>> Are you sure yours is dead?
>>
>>
>> cb
>> On 11/6/2017 3:14:32 PM, Michael Brant wrote:
>> Yeah that part that plugs into the mobo
>>
>> On Nov 6, 2017 4:13 PM, "camillus gmail" wrote:
>>
>>> With power supply do you mean the transformer, because all the power
>>> supply parts are building on the mainboard?
>>> On 11/6/2017 3:08:50 PM, Michael Brant wrote:
>>> Does any one have a spare coco3 power supply they would sell ? If so please
>>> pm me.
>>> Thanks
>>>
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