Quote:
Originally Posted by wasyoungonce
Hi Chris.
I used a 50W TEC (Jaycar) which drew around 4.8A max. I used a separate power supply to the system so as to not induce noise onto my other 12V equipment.
4C stable is excellent result. Try to keep the camera nose pieces and Drawtube (DT) connection well insulated as well. The OTA and focuser (and ambient) will be sinking a lot of thermal efficiency from this area.
I just wrapped insulation material (like stubbie cooler material) around this area.......crude but worked.
As you have found...cooling really reduces sensor noise. Congrats!  |
Yep, thats the one I have on there now, this is more than capable of producing ice on any exposed metal. I have insulated up areas around the heatsink where the condensation was, this seems to have eliminated that.
The nosepiece is a little harder though, due to the low profile adaptor I use to reach DSLR focus. its a bugger already to tighten up the grub screws to hold the MPCC in the focuser as the adaptor is pretty much butted right up against the front panel of the aluminium and my Fred Flinstone fingers arent dextrous enough to contort past the foam and tighten them up easily, hence I am getting some funky camera alignments on the sensor. I may simply put some thin adhesive foam in this area to help...
Quote:
Originally Posted by multiweb
For a minute I thought your camera developed some serious symptoms of avandonkatitis  Glad it's all working for you. |
yep Mark, I have caught the mod bug now, I sit inside and look at the cooler box and plot what's next to add or improve....I have already contemplated redoing the chunky foam for some tidier sheets to pretty it up a bit. Aesthetics are nice, but if I can keep the camera around 11 deg or more below ambient, this will satisfy me for now, especially on the cooler nights, I may even get some negative numbers on the camera.
Now THAT would be cool
Cheers
Chris