Unusual fan in an SE

[bibilit]

I have collected an early SE monday (two 800k)

I removed the casing yesterday to have a look inside, and instead of the square fan, this has a cylindrical fan.

I haven't seen any of those before, but looks original.

Common setup ??

 

[Compgeke]

It's original, only found on early models. Heard them referred to as hamster and squirrel cage fans before. 

 

[bibilit]

That's the one, found pictures with the "squirrel cage" tag, a bit noisy.

 

[uniserver]

i like the squirrel cage fans.   I like the air flow, and the ones that i have are silent,  products with a fan like that were usually High-End from the era.

 

[Elfen]

It's common for the early SEs to have "squirrel cages". I prefer them as they have better air-flow and keep the SE cooler.

 

[unity]

The first round of SEs did have that fan. It was found to be noisy so Apple issued a "silent" recall and replaced the fans with the standard box fans. If you look at the board, you can see it has mounts for both styles. So someone at Apple was thinking. Remember the SE was the first compact with a fan. With the recall, the squirrel fan units are a little harder to come by. But since the SE was a well sold machine in bulk, its not hard to come across a large quantity from a university, or such, that still have the original fans. I think the first one I saw was a couple years ago, before that never an SE with one. Now I have several.

 

[uniserver]

i think what happened is they plug up full of dust and begin to vibrate and cause NVH that way... but the 3 or 4 that i have been around move a lot of F'in air efficiently and quietly.  

 

[CC_333]

I bought an SE from it's original owner, and it had one of these fans. I upgraded it to the later box fan, but in retrospect, maybe I shouldn't have? I still have all the parts from the old fan, so I could always put it back if I *really* needed to.

c

 

[bibilit]

I have cleaned casing, drives and the dusty logic Board, then gone for a test, working fine..







The Squirrel cage fan

 

[SE30_Neal]

I'm nervous as I've just stripped my SE/30 down and cleaned it up ready for recap, hope it works when I put it back together.

 

[uridium]

I've got one of these in my SE. Actually moves a heck of a lot of air.

No squirrels here in .au  ..so I'm naming it the "whirly-gig" .. you'd have to be from west.au to get that though.

 

[olePigeon]

Now I want a squirrel fan.

 

[olePigeon]

Whatever it is, I'm sure it's poisonous. :lol:

 

[Paralel]

If Australia had squirrels, they'd likely spit venom or something. Everything down there wants to kill everything else it seems.

 

[Schmoburger]

Nah Australias not too dangerous... hang on, is that a white-tail spider? Shit. Halp.

 

[SE30_Neal]

You do seem to have all the nasty critters down under, back here in blighty (uk) we have lots of pesky squirrels though, giving you the evil look and destroying your garden plants!

Damn you squirrels! Haha

 

[uniserver]

drake stuff back then was high end!  Check out its cooling fan.  2000watt ham radio amplifier.

http://www.ebay.com/itm/DRAKE-L-4B-RF-Linear-Amplifier/161993284503?_trksid=p2047675.c100009.m1982&_trkparms=aid%3D777000%26algo%3DABA.MBE%26ao%3D1%26asc%3D35624%26meid%3Dbf6ac17373484849a87c0eeccae33eef%26pid%3D100009%26rk%3D1%26rkt%3D1%26sd%3D141925359184

 

[Paralel]

Looks like you're coming up against standard circuit tolerances, a typical circuit can only handle 2400 watts. After that I guess you need a special industrial installation?

 

[rsolberg]

I imagine 2000 watts is its rated output power. Assuming 70% AC to RF efficiency, it could draw over 2800w- meaning 800w of heat for that fan to move! Uni, I'm curious if I'm even close. What's the supply voltage, is it AC or is there an external power supply?