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Originally Posted by Bmanners
For those of you using Peltiers to cooler your mirrors using computer CPU coolers as hotside heatsinks works well. They are about the right size and do quite a good job. They also often come with 12V fans however some of these can be rather noisy.
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Yep, a couple of old slot-A style heatsinks stolen from Athlon-450's made up my previous model, seen here:
http://www.acquerra.com.au/personal/...omy/cooling/2/
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Bird: You might find those Peltiers work better if you drop the voltage a little. This sometimes helps as it reduces the load on the hotside heatsink. Maybe run them at 7V (between 5V and 12V rails on a PC power supply) and at a 100% duty cycle?
Cheers
Brett
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Thanks, but I think they're working ok, I've been experimenting with different duty cycles, I didn't have this option on the previous model so it's something new for me to explore. With the relatively warm nights during summer I don't want to overheat the hot side so I run a dutycycle around 75%, but in winter with colder nights I'll be back at 100%.
This new model is more slimline than the old one, since it's an integral part of the scope, and one of the things I sacrificed was large heatsinks on the hot side, so it's definitely something I have to keep an eye on.
The cooling graphs I'm getting so far are quite satisfactory.
regards, Bird