>Hi All,
>
>Just been thinking about running a Classic without a hard drive but more
>like a Plus with a superfloppy. Would anybody care to guess about the
>viability of running one of these without the noisy fan?


Good idea!  I remember the noisy fan being one of my only issues with 
these great little boxes.  Heat however is a big issue with that 
cabinet design, and it just can't be done without venting.  Here's 
what I did with mine:

1:  I had a few power amp heat sinks lying around, so I pasted a 
little silicon grease (just a tiny tab) onto the cpu chip, and stuck 
a 3X4 inch heatsink on it. I remember being surprised there wasn't 
one already, but I also recall that clearance around the CRT tube was 
tight.

2: I mounted 2 matching muffin fans in dense foam rubber to isolate 
their sound, replacing the drum fan installed on my machine. When I 
did this, I carved out the original rear vent, and just put black 
windowscreen mesh over the two muffin fans.

The fans were about 2.5", very quiet to start with, required 12VDC 
but I fed them 9VDC from a wallwart transformer, and I built a frame 
from light aluminum channel to mount them in, side by side (although 
thye are mounted in a stacked configuration). The foam rubber was the 
dense grey adheshive foam for weatherstripping, and it worked well.

The whole thing here is to use springs or rubber or foam to isolate 
your fans from the cabinet, which acts as a sounding board. Springs 
work the best, but are awkward to mount. a large washer and thrubolt 
could do it...


Anyway, my small mods made my mac almost silent. Only thing was I 
later had to install a condom around my floppy drive because it was 
serving as a dust collection bag.  Good on you for making something 
elegant even better!


m

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