USD Calypso VI

[8dust]

Can someone provide an aprox. date range on a Aqual-lung Calypso VI ?

thanks, 8

[Fishpie]

I'm sure others have the exact dates but mid 60's to early 70's would be an aprox range.

[Luis H]

The Calypso III was around maybe in the late 60’s, but mostly in the early 70’s.

The Calypso IV came out in the mid 70’s.

I never heard of a Calypso VI.

You can download copies of many of the US Diver catalogs at VintageDoubleHose.com
That would be the best way to confirm the actual years when it was out.


The diagram below is of a Calypso III. The Calypso IV was basically the same, but it had a swivel at the LP end of the barrel with two more LP ports. The later Calypso IV also had a heavier yoke with the larger yoke screw and similar yoke knob used by most Aqua Lung regulators now a days.

Good luck

[couv]

Hey Luis,

Looking at item 28 in the diagram above, I am wondering if the IP can be adjusted externally?

Thanks,

Couv

[herman]

Not Luis but no, the 28 is just an end cap, the J model had a built in J valve in place of the cap.

[Luis H]

As Herman said, Item 28 is the cap closing the J valve chamber when the reserve was not installed.

In the Calypso IV there is a small spring and adjustment screw inside the swivel turret assembly (the item replacing Item 1). You could adjust the IP by removing the regulator hose at the end of the swivel cap and inserting a heck key (Allen wrench) into the adjustment screw. It would allow you to lower the IP, but more often you actually had to add shims under the main spring to increase the IP.

Not the most convenient regulator to adjust or service, but there are worst.