Secondary dew heater
#1
Posted 15 February 2013 - 10:30 PM
My question is can anyone suggest a material? It obviously would need to non-conductive but also able to transmit the heat from the coil to the secondary. How about the backing? Neoprene foam?
What materials do the Kendrick heaters use?
Thanks for any help!
#2
Posted 16 February 2013 - 12:08 AM
#3
Posted 16 February 2013 - 07:39 AM
#4
Posted 16 February 2013 - 09:26 AM
Taras
#5
Posted 16 February 2013 - 09:58 AM
The ideal solution is a shroud, but if you have a secondary that is glued to a stalk I would suggest some sort of thick rubber (1/4") or foam insulation covering the heating element.
JimC
#6
Posted 16 February 2013 - 02:54 PM
You will have better results if you can insulate the back of the secondary. Otherwise you are mainly heating air.
The ideal solution is a shroud, but if you have a secondary that is glued to a stalk I would suggest some sort of thick rubber (1/4") or foam insulation covering the heating element.
JimC
I have black foam to insulate the back of the dew heater for the secondary ready to go!
#7
Posted 16 February 2013 - 04:15 PM
#8
Posted 16 February 2013 - 09:10 PM
I might buy the heating elements themselves...especially the heater for the telrad as that is a very tight fit. I'm pretty sure that I can get the secondary heater and eyepiece heater working.