That's cool. Second hand systems seem to be easily obtainable.For your condensation experiment, don't forget that cold air can't hold nearly as much moisture as warm air. To duplicate diving conditions in a water vapor rich environment, you'll want to have the CRT in a container filled with warm air (30+ C) with very high humidity (90% or so), surrounded by a very cool (7-10C) outer environment like a cold water tank. The worst environment is one in which the difference between current temp and dew point is very small.
Jens Laland wrote:
Jon I did not mean to indicate the use of a proprietary security system, but rather using second-hand (or NOS) surveillance type of video cameras, often obtainable through eBay, or otherwise. Besides, I recently purchased 3 identical, brand new battery powered monochrome 5" CRT monitors from a local close-out sale, paying $8 pro item. So I stowed away two of them to serve as spare parts, whilst the last one was totally stripped down, and now to be put into a new custom built, sturdy aluminum housing, complete with better quality on vital components such as potentiometers etc. This special monitor is then planned to undergo operational tests within a cold, but damp environment to see if its possible to avoid internal condensation at all. Personally I am not that concerned with some extra 2-300 mA, as my intended use of an optronic mast is solely to improve my own line of vision while cruising with a trimmed diesel at surface (for which I would probably also need an air induction mast).
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