- My IDA-71is a conversion to an active, pure-O2
CCR. It's great for natural observation, and easy to dive; it's good
for first experiences with rebreather, if you respect the rules.
- I removed one scrubber and the Russian bottles
+ first stage regulators. I added a 0,8l- bottle with air for BC and
some breathes bailout... but bailout should not be necessary for 7 m.
For dry diving I can change this bottle against a 2l- version.
- The oxygen bottle carries 2 liters, its more
than enough for two dives, and I can fill it from a storage tank with
less then 200 bar - its also enough.
- The BC is a wing bladder "seaway com", the
harness is self-made. For O2-Mode I use a scubapro full-face-mask,
but I have also an adaptor for mouthpiece or the original Russian mask
with clear glass. The use of FFM compensates also the mismatch, that
the IDA has no water traps.
- For ppo2 monitoring I use a Draeger Oxygauge
with high ppo2 Alarm at 1,6 bar.
- The dive time is approximately 3h, limited in
first line by the scrubber. But I can mount the second scrubber
canister... :-). I use "spherasorb" as scrubber material.
- External bottles or accumulators can be fixed
with a side-mounted metal-sub- adaptor.
- O2-diving is a fine thing, but I built in
01/2003 an SCR version from this rig. In the last days I also made a
CCR version in Kiss Style (injection valve from Gordon Smith).
- But first I must try out it in the next weeks.
- Then I have a unit, that is easy to switch (but
not underwater...) between the three working modes.
- Uwe aus Germany (Dresden)
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