Wow!!!

Great instructions and a huge saving Martin 👍

Always love your vids mate, they are full of information and advice

I thoroughly enjoyed your video, Martin, like I do all of yours! You put a lot of dedication & thought into your films. Great presentational skills, too! My 11" Celestron RASA actually came with a built in cooling fan near the primamry mirror, but I won't use it much as my telescopes all live outside 365. Keep up the great work, Martin, can't wait 'til your next video!! Clear Skies m8

Very nice. One thing which i have to think of is the Vibration. To isolate the Loudspeaker and other, i use Sorbothane. I think by putting enough in between the Fan and its counterpart will isolate the vibration a little bit.

It's very ingenious :)) Thank you !

Another excellent DYI project! Thanks

Your videos are always interesting and informative. Just bought a peltier to cool my dslr based on your box design 3 part video. Great stuff.

Look forward to it mate! Andy.

Just insulate it like everyone else does. A lot of effort for what? Insulating Cats is a simple premise. Consider this: When a closed system OTA such as a Mak or SCT cools, the metal tube cools much faster than the primary mirror and baffle tube inside the OTA. This results in a heat differential between the tube and the guts of the scope which generates a heat plume. Waiting for the guts of the scope to reach thermal equilibrium with the metal tube can take anything from an hour to all night depending on the size of the scope. Insulating the OTA stops the metal tube from cooling too fast. This way no heat differential is formed so no heat plume is generated. As there is no heat plume then there is no need to wait for the OTA to cool down so you can not only use the scope straight away but also rip high magnification straight away. Insulating an OTA does not stop the cooling process, it only retards it to the point where a heat plume is not generated. I have been insulating my SCTs and Maks for several years now and it has been fantastic as I will only have two or three hours at home to use a scope, and a 9" Mak will not have cooled in that time, but by insulating it I'm ripping 400X from it straight away (as seeing conditions allow). Those people who argue that insulating doesn't work either haven't tried it or have not properly wrapped their instruments so a heat plume is still visible. Insulating a scope does require some consideration - it isn't just a matter of "oh, I'll just use one layer of this stuff" & then whine about it not working. It does require thinking about the size of the scope, where you are setting up & heat differences between the outside to the temp the scope was stored at, plus the thermal properties of the wrap material. Many people use one, two or even three layers of Reflection. I have used yoga mats and now only Coreflute with my scopes and these have all been excellent performers for me. An added bonus of insulating an OTA is it also extends the dew-free period for the corrected plate. Depending on conditions & your scope the wrap & extended dewshield may be all the dew protection your scope needs. Also depending on the materiused for the dewshield you can install fans into it to provide totally heatless dew protection for your scope. Insulating an OTA is ONLY for scopes that are totally closed such as SCTs and Maks. Ref www.cloudynights.com/topic/812857-so-what-is-it-about-insulating-cats/#entry11726988

Can't wait!!

my ears lol

Some wishful thinking going on here, I'm afraid. Most of the turbulence is in our atmosphere, not the telescope tube. I think the cooling device is good anyway, to get the temperatures equalised, but that is not where the turbulence is.

Need a new microphone

Oh and your idea is already patented by someone else. unsubbed