Quote:
Originally Posted by strongmanmike
Funnily enough Mario  it was I who actually developed the new style split heaters you see there with Kendrick in 2012, in order to fit the large stalk mounted secondary on my 12" F3.8 Orion Optics UK Astrograph...but I haven't actually fitted it yet 
I have found I actually don't need it, so while I intend to fit it I haven't got around to it. I wanted it for when I moved from Newcastle (as in the link above) to Canberra, I actually thought the colder climate in winter here would require one but in actual fact I never had a problem, even when outside all night, probably because I run my three rear cooling fans all night, which suck air down the tube and out the back of the OTA (rather than blowing on the back of the mirror)..? Now under a dome, the secondary heater is even less necessary it would seem...?
In any case... yes! I thoroughly recommend the new Kendrick split style heaters if you are having secondary mirror dew problems 
Mike |
Thanks Mike good point on the fan orientation no need for air to push against the secondary mirror when the real problem starts at the top of the scope for a lack of temp equalisation.
P.S Just when i thought, im spending too much I see youre rig.
