Need specs for IBM PC Convertible power supply

[tom ponsford]

Vintage Computer Festival wrote:

>On Fri, 27 May 2005, tom ponsford wrote:
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>>Yes My convertible has the power supply(AC adapter) The DC output is 15V
>>at 2.7 Amps. The I'm not sure of the size of the power connector but
>>it's the common black tipped barrel variety
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>Urg!  Thanks for the voltage specs but what about polarity? ;)
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Well looking high and low over the adapter. I could not find ANY 
markings that would show the tip polarity. it might be on the jack inlet 
on the computer itself, which I don't have in front of me.  For some 
reason I always though the tip polarity was on the inlet itself or was 
indicated by the color of the tip (or was that the size indicator?) . 
It's too late and past my bedtime for me to give cognizant answers :-)

Looking at the manual though, the battery pack does power the computer 
for 6-10 hour normal use. Until you can find an adapter (and the right 
tip polarity) you can still power it up by making your own battery pack 
as its connected to the computer with a simple 2pin 2 wire connector. If 
I can't find the right batteries around the house or shop, I just head 
down to batteries etc, and they can always whip something up. Heck they 
even put together a real nice authentic looking TOY battery for my vax 
with even the plastic coating!! But usually I do it myself.A  9.6 volt @ 
1.8 A/hr shouldn't be hard to find.