Dew heater ring for QHY 8

[TrevorW]

Can someone tell me if these get warm when in use

mine does'nt seem to get warm to the touch

[Tandum (Robin)]

I got one and thought it was busted but it reads about 230 ohms so there's a circuit there and it must be working.

[pmrid (Peter)]

Originally Posted by Tandum

I got one and thought it was busted but it reads about 230 ohms so there's a circuit there and it must be working.

And it only needs to keep a temp a few point above the frost point so it would not necessarily feel particularly warm/hot anyway would it?
Peter

[allan gould]

I have one for my qhy8 and it seems to work but I always have the camera drying, then assemble it for use and it doesnt fog up. Doesnt appear to heat excessively but I think it supplies gentle heat to the AIR above the chip and near the filter so that no dew condences there.

[mithrandir (Andrew)]

To the fingers the heater ring feels slightly warmer than the focuser and I haven't had the CCD fog up with it running.

[peter_4059 (Peter)]

Touch the circuit board inside the metal ring - not the side with the soldered contacts - the other side - it definately gets hot but the metal ring is not in contact with the board so it does not heat up.

[allan gould]

Originally Posted by peter_4059

Touch the circuit board inside the metal ring - not the side with the soldered contacts - the other side - it definately gets hot but the metal ring is not in contact with the board so it does not heat up.

Ha
Im 13 posts ahead of you. Make that 14.
Allan

Sorry for hijacking the thread

[TrevorW]

Thanks for that tested and seems to be slightly warm to the touch but not hot after about 15 minutes or so also noticed temp wasn't uniform around the ring one part was warmer than another