|Working with the computers of the
Apple II series ( II+, //e or IIGS ) is usualy quite full with
pleasure ... untill you start to enhance those systems with a
couple of Interface- or expansioncards..... specially if you
start to raise the amount of memory or if you start to eqip your
computer with additional floppydrives or use coprocessorcards
with additional memory ( unlike the simple "Softcard" with the
Z80 Processor ) you will find out that the inside of the apple
will slowly turn into a stove heating the entire area around the
computer and you will also find out that the system turns to a
rather instabil status - causing unpredictable crashes and
The normal reason
for this is the unsatisfying problem of a weak powersupply in
the applesystem. This problem is related to all computers
throughout the entire series....
this is the result from the fact that in those days the market
did not offer many chips for switching-power-supply-control and
the powersupplies from those days where rather weak all together
or like later with the arrival of the IBM PC the
switching-power-suplies became rather "bulky" and waisted much
space and needed large cases.
Years later the
switching-power-supplies started to "shrink" dramatically and
the power raised at the same time dramatically....
The first powersupplies for the
IBM-systems provided a summary of 120 Watt the next generation
offered 150 Watt and few years later the supplies commonly
offered 250 to 350 Watt (summary-) power. Nowadays in the same
cases powersupplies with 450 Watt to 550 Watt are usual. In the
same time the cases of those powersupplies started to shrink in
size and became smaller and smaller......
Some "slimline"-systems have realy tiny
liitle switching-power-supplies in this days.....
So i for example started few years ago
to collect the cases of old powersupplies from Apple II clones
just to get an amount of cases for power-supplies that fit in
the Apple III series computers..... i really didnīt bother if
those supplies were working or not ... i just wanted the cases
and the electronic inside the cases went to the recyclingyard.
At the same time i started - when visiting a electronic-shop -
to keep an open eye for PC-powersupplies from small
slimcase-systems and if some were offered with correct
dimensions ( i.e. it would fit in one of those
apple-power-supply-cases ) i bought that supply and time
by time i collected a cheap little amount of "fashionable"
fitting supplies ( usually paying some $15 to $25 for that used
supply.... sometimes you could get them by a visit at the
recyclingyard for $5 bucks per unit....
Thereafter at home again i warmed up my
solderingiron and did a small "heart-transplantation" by moving
the interior electronics from the PC-supply into the case of the
apple-power-supply-case from those collected apple-taiwan-clone