Signor Ponders.....here's everything you need to know. The best way control the dew heater is with a switch mode controller of which there are heaps of designs floating around on the net. Here's one, together with a very nice solution for the LX90 (same ota as yours) the cct is as simple as you will find and he's even documented the PCB layout.
I think the gauge of wire that DSE sells isn't quite ideal but all that's required is to vary the length.
http://www.backyard-astro.com/equipm...dewheater.html .....
