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sombunall
June 26th, 2010, 01:51 PM
After feeling the heat of a voltage regulator and some metal can transistors on the underside of my 10 meg drive I wanted cooling while I exercise my MFM drive collection. I came up with this. It uses an epson 5 1/4" adapter for 3.5" drives with no front (any floppy adapter would have worked but I don't have many metal ones), meccano and 92mm fan with nuts/screws. I know the airflow isn't so good with only a 5mm space below the fan but it seems to work well enough. If was going to get serious I could cut a hole in the bottom and use longer meccano with right angled feet. No new holes were drilled to make this.

http://www.vintage-computer.com/vcforum/attachment.php?attachmentid=3775&d=1277588004

http://www.vintage-computer.com/vcforum/attachment.php?attachmentid=3774&d=1277587989

NathanAllan
June 27th, 2010, 11:06 PM
Excellent! Any airflow is better than none, and yeah those drives do tend to get hot. Great job! It fits the bill.

strollin
June 28th, 2010, 05:50 AM
Neat idea. I'm no expert in thermal cooling but I think a vertical mounted fan that would draw cool air from one end and exhaust hot air at the other would be more efficient in this case. I wonder if this type of fan would work better? Wouldn't be too hard to adapt it to your design.
http://www.strollin.net/drivebayfan.jpg
It would be interesting to do some temp measurements to see what the before and after temps are.

sombunall
June 28th, 2010, 11:42 AM
Neat idea. I'm no expert in thermal cooling but I think a vertical mounted fan that would draw cool air from one end and exhaust hot air at the other would be more efficient in this case. I wonder if this type of fan would work better? Wouldn't be too hard to adapt it to your design.



I guess you've never seen the Antec MX-1 then? They use a horizonal design so they can get away with a bigger fan that turns slower. I have it and it's great. Sometimes I use audio microphones to document the audio/EM so noise is an issue.

Antec MX-1
http://www.thegadgetblog.net/2008/02/20/the-antec-mx-1-actively-cooled-hard-drive-enclosure/

strollin
June 28th, 2010, 01:32 PM
You'll notice that the MX-1 has vents and slots to channel the air so it's doing more like what I was saying. The point is to have a controlled airflow, cool air in, hot air out. Probably not worth over engineering in this case.

Old Thrashbarg
June 28th, 2010, 01:44 PM
You're right that the horizontal fan with no channeling isn't going to be as efficient as the other design, but any airflow is a lot better than no airflow, and a 92mm fan is going to move a lot more air than two 40mm fans, so you probably still end up with a net gain in cooling anyway, even with the lower overall efficiency. (One 92mm fan is also a lot better for the ears than two 40mm fans, though I dunno if that would really matter much when an MFM drive is involved.)

gerrydoire
June 28th, 2010, 01:48 PM
I'd paint the metal pieces silver and use the same screws, for esthetics!