aleph 2 temperature

[MikeZ]

I was just curious what temperature values people have gotten at the 'hottest spot' on their aleph 2 heatsinks once they reach standard operating temperature.

Thanks Mike

[GRollins]

About 105 degrees F, if I remember correctly. That's on the device itself.
Ahem...
Mine are water-cooled. Your mileage will definitely vary.

Grey

[Brian Donaldson]

I have a thermometer tucked in between fins behind a fet with a peice of rag jambed in to help get a acurate reading. running full tilt 52V 5A It'll hit 170 deg f without the fan. Smells funny but sounds great. The pair will raise the room temp about 10 deg. when you walk by them, it's like walking past a fireplace.

[Mark A. Gulbrandsen]

Wow! Brian I hope you have a Halon fire extinguisher system right above them. Sounds like its quite possible they may see molten Aleph 2's in China some time in the near future.....

My 2's run at 55 deg. C. with plus and minus 42 volts on the rails and about 4 amps.

Mark

[jewilson]

Do you own a fire extinguisher

[Brian Donaldson]

That's the temp with no fan. my finished chassis will have a fan that draws air in the back (to cool innards) and will exaust through a row of holes, one in between each fin to help drop rtheta. The voltage to the fan will be controlled by a neg coef thermister in a voltage divider that will drive a source follower so fan speed can track temp. I still need to play with this circuit to be sure the the speed doesn't overshoot and turn off and on. With the huge thermal mass and slow ramp up from stop to full, It should settle on a speed.
When I was doing my stress test, I had the surge protectors switch near by.

[Mark A. Gulbrandsen]

Hey Brian,
Route the hot air output from them into your heating ducts! Toss the thermistor and just hook the fan to your house thermostat . Money spent on electricity will be saved on gas. The water cooled Aleph dudes can heat water for the hot tub instead. Gee the economic consiquences of owning an Aleph might actually be pretty positive. Comming soon, Mr Aleph Coffee Maker brewing full High Fidelity Coffee!

Lets see a Krell pull off any of these feats. Well ok, they could if you're into drinking ice coffee I guess.
Mark

[jewilson]

Brain,

The fan speed control sound nice, but shouldn't you just set it to max.

[jleaman]

Im putting a fan on mine also just a small one to move the air inside around to keep the inards cooler. i dont want a fire. : O ) Small fan running at 3v will more air slowly and quietly enough..

[Nickolas K.]

Have you ever considered getting yourself somethink like this?