[DavidTrap (David)]

Hi Charles,

So I'm not the only one who has had dewing troubles with the RC10C! I have had similar experiences to yourself.

I've been corresponding with Kendrick about an RC dew heater pad that goes on the back of the mirrors, but they don't have one small enough for an RC10 and I don't believe you can cut the pad down to size…

Given a lack of other options, I've been doing similar to what Mike does - I've wrapped a dew strip (initially two to get the length required) outside of the tube, and run the fans +/- secondary heater. I've also installed a thermistor onto the back of the mirror when I took it out for cleaning. I used some thermal paste from Jaycar and stuck it down with aluminium tape. The wire feeds through one of the fan holes and I attach the meter outside the scope. The meter has two sockets so I can measure ambient and mirror temps. I'm working on the theory that keeping the mirror above the dew point should keep it dry. I've also sacrificed a camping mat to make a further dew shield around the front of the scope - can't hurt!

The above seems to help, but I'm haven't had the scope outside enough to really know if the problem is gone. Given the fans are running, I don't believe it causes big problems with tube currents.

Hope it helps. Let me know if you need further information.

DT