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Can't address the fresh vs salt issue, but within the past 2 weeks I've been in bottom temps down to 36 deg give or take a degree with a MK20, and a buddy with a MK20 UL (the alum POS) The MK20 AL free flowed on one of the dives. My buddy thinks it was due to his playing with the tuning knob on the second stage and initialing a free flow that then froze the second open (due to the pressure induced temp drop in the first). On a subsequent dive I tried this on my brass MK20 with no effect. I think the AL version does not hold the heat as well being that AL is a better conductor of heat than is brass. If this is the case I would think the lightweight AL first stages would not be suitable for cold water. Any thoughts on this? Bill --- Wendell Grogan <wgrogan@dc*.ne*> wrote: > OK, new subject. We are starting the exploration of a 160-180 ft > deep > reservoir that may or may not have remnants of a town at depth. > The question that came to mind when my thermometer was reading 36F > was > if there was a big difference in the tendency for a reg to freeze in > salt versus fresh. I think there is an obvious answer to this, but > honestly, I was hoping someone could tell me without my having to > figure > this out on my own. > Thanks. > Wendell G > -- > Send mail for the `techdiver' mailing list to > `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/ -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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