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Hi Ray > Based on my with George, I have now ordered to Apeks DS4 first stages with > the new much smaller TX100 second stages (G500 size). I thought the TX100 seconds couldn't be opened in the water. Do me a favour and let me know what you think when you get them. > Georges statement that > swivels are not needed and that 3/8" is sufficient are sound (As are your > arguments as well). The reason I believe the the 1/2" is probably used is > for very cold water to reduce the speed of the air, and therefore the > thermal loss, but that's probably just theorectical anyhow. I think it's marketing bullshit. > The DS4 is the > same as the US4 but dry sealed. I dive in absolute shit, cold, murky, salt > water with vis often less tha 50 cm. If you see an unsealed first stage here > after a seasons use, it's almost eaten away and has so much crap encrusted > on it, you're amased it moves at all. Like I said, the TX100 breathes like a > dream and doesn't have a swivel, but does have the 1/2" hose, so I'll try > the DS4's and if they work OK then I'll continue to use them, otherwise I'll > just go back to the TX100. I love the DS4s. Please let me know how you think they compare to the TX100s. Cheers Ric Richard J Lister Georgetown Institute for Cognitive and Computational Sciences Georgetown University Medical Center, Washington, DC 20007, USA Phone: +1 202-687 2878. Email: ric@gi*.ge*.ed* Web: http://www.giccs.georgetown.edu/~ric/ -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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