Quote:
Originally Posted by rcheshire
Prior to filling the cavities created by the sensor pins to PCB gap, isolate the edges of the CF from the pins with strips of plastic - or some other means.
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Rowland thanks, I am thinking that I will coat the entire cold finger (with the exception of the sensor contact patch area) with boat building epoxy (specifically International HT9000). Epoxy encapsulation has been used for many years and if the right epoxy is used (not the five-minute stuff from Bunnings which is hydroscopic over time) it will insulate the finger very nicely and can be applied thinly by brush. Once encapsulated the finger should not need additional insulation across the rest of the internal area (but I will test that), and it should reduce the chance of condensation inside the camera. Outside the camera the finger will be open for condensation trapping.
The copper finder will need to be solvent cleaned and 'keyed' with fine sandpaper to allow the epoxy to form a good bond to the surface. I am also considering coating the entire upper sensor board with epoxy as opposed to hot glue or other substances, as it will be more durable and only a thin coat would be required.