[Coco] 1mb and 2mb memory upgrades

[Hugo Dufort]

There used to be a huge problem with crappy capacitors in power supplies 
(the so-called "Capacitor Plague" of 1999-2007). I remember having to 
replace PSUs in many computers at home and for friends and business 
partners; in some cases, the computer was fried. I've kept a few 
pictures of leaky or blown-up capacitors in my folders. The current 
power supplies (post-2007) seem to be much more reliable though.

Hugo

Le 2015-03-13 10:52, Gene Heskett a écrit :
> On Friday 13 March 2015 09:14:42 Joe Grubbs wrote:
>> I meant to ask this the other idea when the topic came up. I believe
>> someone said that the 1mb and 2mb upgrades required the use of
>> another/second power supply. Is this due to the fact that the CoCo3's
>> supply is too weenie to handle it, or were different voltages needed
>> for the memory that was being used?
> Too weenie.  Seriously too weenie.
>
>> If the former, has anyone considered bolstering the power supply with
>> a better transistor, heat sink, and perhaps a stouter transformer. Or
>> maybe a newer high current switcher?
> I chose the all of the above option 20 years ago, my whole system runs on
> an old xt supply. And it seems to be immortal, unlike the currant crop
> which are carefully designed to fail 2 weeks out of warranty.
>
> Cheers, Gene Heskett


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