I had the 11" Celestron RASA returned to me from collimation on Friday. So yesterday morning I set it back up on the mount.
I connected everything needed and went back into the house for a well earned cup of tea and left the dew strips connected to power.
I'm drinking my cup of tea when my wife screams "....your telescope is on fire......quick throw a bucket of water on it!"
Well....the bucket of water was out but I did see flames coming out of one of the dew heater strips & small puffs of smoke. I cut the power very quickly (the circuit to the telescope is on quick stop switch).
Investigating the problem- one of the connections where the power cable meets the dew band had gone open circuit and there must have been a clear short circuit. I inspected 2 of the other dew strips & saw potentially the same issue to be forth coming. I have now replaced the dew strips.
Some lessons to be seen here-
1. check all your cabling for signs of wear.
2. Teach wife about water, electricity & optics?- in the wrong sequence it can all go badly.
Clear skies to you all.
Edited by pyrasanth, 08 December 2019 - 08:33 AM.