Old Yellar Tank Weight
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I think this dates back to before the AL80 to the AL72, which was a "floater" at about four pounds positive for each tank. I will post a photo of me wearing twins made of these floating tanks, with a PVC tube in the middle holding 8 pounds of weight.
SeaRat
SeaRat
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aquacat8
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I think it's 6lbs of vintage lead LOL
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aquacat8
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OP
aquacat8
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aquacat8,
Below are two photos showing me using the twin AL 72s, which were floaters. I believe they were rated at 2475 psig, and were a full 72 at that rated pressure. The steel 72s were only at 72 cubic feet of air when at a 10% overfill, or 2475 psig. But these steel 72s were stamped at 2250 psig. So unless they had a "+" behind their stamp, they were only about 66 cubic feet of air. On these twin AL 72s, you can see the eight 2-pound weights were contained in the PVC pipe on the back. These weights were originally made for a Mar-Vel integrated weight pack for single tanks, and were 2 pound each, about an inch and a half in diameter, and three or so inches long.
These photos were shot in Clear Lake, Oregon (headwaters of the McKenzie River), and I have a very special wet suit, which incorporates a BC into the back panel of the wet suit. The white on the wet suit's back is a sandwich of two neoprene layers, forming a bladder I could use as a BC. It worked very well, and was designed by Bill Herder of Deep Sea Bill's in Newport, Oregon in the mid-1970s. This photo also dates to that era. These AL tanks had just come onto the market, and people did not like them because of that "floater" situation.
John
Below are two photos showing me using the twin AL 72s, which were floaters. I believe they were rated at 2475 psig, and were a full 72 at that rated pressure. The steel 72s were only at 72 cubic feet of air when at a 10% overfill, or 2475 psig. But these steel 72s were stamped at 2250 psig. So unless they had a "+" behind their stamp, they were only about 66 cubic feet of air. On these twin AL 72s, you can see the eight 2-pound weights were contained in the PVC pipe on the back. These weights were originally made for a Mar-Vel integrated weight pack for single tanks, and were 2 pound each, about an inch and a half in diameter, and three or so inches long.
These photos were shot in Clear Lake, Oregon (headwaters of the McKenzie River), and I have a very special wet suit, which incorporates a BC into the back panel of the wet suit. The white on the wet suit's back is a sandwich of two neoprene layers, forming a bladder I could use as a BC. It worked very well, and was designed by Bill Herder of Deep Sea Bill's in Newport, Oregon in the mid-1970s. This photo also dates to that era. These AL tanks had just come onto the market, and people did not like them because of that "floater" situation.
John
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aquacat8
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Oh cool old photos @John C. Ratliff ... and a very interesting approach to a BC haha no tacoing there!
jadairiii
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This is not vintage. Halcyon/Brownies Dive shop sold them in the mid/late 90's as a trim weight for their single wings. Weighted STA's were better and didn't give you that feeling of it wanting to roll you. Plus, they were a PITA when switching tanks between dives on a rocking boat.
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