From JJ to rEvo

V

Venomguy

New Member
2 new rEvo Divers.

Just moved from a JJ to a rEvo.

Actually my wife also just moved as well.

Had been on the JJ for over 3 years and the switch to the Micro FT was an easy transition to make. The rEvo ticks a lot of the boxes that were all drawbacks with the JJ.

Key differences that clearly made the rEvo outshine the JJ for the type of diving we do in the tropics are :

1) Size and weight
2) Underwater Profile (rEvo significantly more streamline)
3) Ease of Maintenance
4) Remote Support
5) Better Trim when diving in Tropical Waters (1 or 3 mm wetsuit)
6) rEvo is an easier unit to dive than the JJ (Wifes feedback)....
7) rEvo looks prettier... (Wifes Feedback)
8) More head movement when diving (no T-pieces to restrict movement)



Andrew
 
I switched from a rEvo to a JJ and Id sugest the "normal" maintinance of a rEvo (cleening it getting to stuff) is much easier then the JJ but the more tricky stuff is the same or harder. Working on anything inside the SS case of the rEvo is a monumental pain in the arse.

Size and weight is an interesting one as id say the JJ is not that heavy. The JJ defo feels lighter than the SS Mini rEvo I had but the Micro? I have never dived.

Again the Micro and trim is unknown to me but the Mini SS is way too heavy for wet suit diving. My JJ with an Ali Back plate and zero lead is perfict fo my 5mm going on 3mm wet suit. The rEvo Mini never had any weight reduction option but obviously the Micro would be lighter

Agree with head movement. The rEvo is right up there with the KISS on that

I dont understand the "easier to dive" bit?

My personal thing with the rEvo is the lack of a BOV, the green is good HUD, It desperatly needs a stand (more so on the micro) for boat diving and the cells being exposed inside the counterlung

I agree it trims out fantasticly but then so does the JJ

I also agree the rEvo is better looking and in many ways better built than the JJ but id only dive a rEvo with Shearwater electronics

100% agree its more streemlined and he forgot to mention the duel scrubber design is absolutly fantastic.

My conclusion is the JJ is a better all round unit. I wouldn't do a 100m trimix dive on a rEvo Micro but I can do a wet suit dive on my JJ. I can do a shore dive on my JJ but I wouldn't want to do a multi bailout cylinder boat dive on a standard Micro. I dont like the JJ BOV but apart from that a JJ needs no extras where as on a rEvo id want a BOV a stand and again personaly a Shearwater HUD.

If somone said I had to spend the rest of my diving life diving a rEvo id perperfictly happy, but if I had to chose one unit between the rEvo and a JJ?


I'd choose a KISS ;) :D


ATB

Mark
 
Mark Chase said:
the green is good HUD,
Mark
Click to expand...

Just to clarify Mark the new rEvo P Dream has 2 settings the green is good (@1.3ppo2) or a green at 1.0ppo2 plus one red pulse for every 0.1 over & orange pulse for every 0.1 under . Paul refers to it as modified Smithers code ?????? Not certain how that varies from a SW hud ?
 
colinicky said:
Just to clarify Mark the new rEvo P Dream has 2 settings the green is good (@1.3ppo2) or a green at 1.0ppo2 plus one red pulse for every 0.1 over & orange pulse for every 0.1 under . Paul refers to it as modified Smithers code ?????? Not certain how that varies from a SW hud ?
Click to expand...



The Shearwater HUD has 1 LED per cell so you can see actual PP02 on each cell just using the HUD.

That way you can monitor cell health with the HUD rather than constantly checking the wrist unit.

If a cell drops out you spot it instantly as the disturbed flash rythum is eye catching.

My rEvo didnt even show all three cells at the same time but I was impressed with how easy it was to remove the rEvo dreems and replace them with a Shearwater HUD

The rEvo is defo the most field servicable unit I have owned.

ATB

Mark
 
Mark Chase said:
If somone said I had to spend the rest of my diving life diving a rEvo id perperfictly happy, but if I had to chose one unit between the rEvo and a JJ?


I'd choose a KISS ;) :D


ATB

Mark
Click to expand...


I can always rely on you to make me feel good about my unit choice :)
Shearwater Petrel was a good addition and one you won't agree with,
a Dream HUD that I actually like :wavey:
 
Never dived anything but the revo HUD so I can't compare. I've found it petty good though. I like the green=safe to breathe idea, and I tend to notice the change from steady when things start to drift. Trouble is that if one of the other LEDs fail (which I've had) you lose the warning before serious action is needed. I'd quite like it if the green LED flashed off when one of the others flashed on. That would stop it looking like everything is OK.

Multiple cells on one dream isn't ideal I agree. Much nicer with two dreams. As you say, discordant flashes really attract attention.

I know people swear by smithers codes but to me I can't see it being that good for knowing if absolute values like if I'm getting a smidge too rich or lean. My brain isn't going to take in the number of flashes as i concentrate on something else. Differences between cells is easy to spot, but this has more to do with having a dedicated display per cell than the signaling.
 
Paul S said:
I'd quite like it if the green LED flashed off when one of the others flashed on. That would stop it looking like everything is OK.
Click to expand...
the green goes off as soon as the breathing mix becomes dangerous: less than 0.5 PPO2 or above 1.55 PPO2

so still enough time to react! :-)
 
paulraymaekers said:
the green goes off as soon as the breathing mix becomes dangerous: less than 0.5 PPO2 or above 1.55 PPO2

so still enough time to react! :-)
Click to expand...

agree with the rEvo hud. Is Far better than the SW and you don't need to have that constant blinking in your face during a dive. Also find the hud easier to see in bright daylight conditions which are common here.
 
Mark Chase said:
I switched from a rEvo to a JJ and Id sugest the "normal" maintinance of a rEvo (cleening it getting to stuff) is much easier then the JJ but the more tricky stuff is the same or harder. Working on anything inside the SS case of the rEvo is a monumental pain in the arse.

Size and weight is an interesting one as id say the JJ is not that heavy. The JJ defo feels lighter than the SS Mini rEvo I had but the Micro? I have never dived.

Again the Micro and trim is unknown to me but the Mini SS is way too heavy for wet suit diving. My JJ with an Ali Back plate and zero lead is perfict fo my 5mm going on 3mm wet suit. The rEvo Mini never had any weight reduction option but obviously the Micro would be lighter

Agree with head movement. The rEvo is right up there with the KISS on that

I dont understand the "easier to dive" bit?

My personal thing with the rEvo is the lack of a BOV, the green is good HUD, It desperatly needs a stand (more so on the micro) for boat diving and the cells being exposed inside the counterlung

I agree it trims out fantasticly but then so does the JJ

I also agree the rEvo is better looking and in many ways better built than the JJ but id only dive a rEvo with Shearwater electronics

100% agree its more streemlined and he forgot to mention the duel scrubber design is absolutly fantastic.

My conclusion is the JJ is a better all round unit. I wouldn't do a 100m trimix dive on a rEvo Micro but I can do a wet suit dive on my JJ. I can do a shore dive on my JJ but I wouldn't want to do a multi bailout cylinder boat dive on a standard Micro. I dont like the JJ BOV but apart from that a JJ needs no extras where as on a rEvo id want a BOV a stand and again personaly a Shearwater HUD.

If somone said I had to spend the rest of my diving life diving a rEvo id perperfictly happy, but if I had to chose one unit between the rEvo and a JJ?


I'd choose a KISS ;) :D


ATB

Mark
Click to expand...

Mark. You seem to be out of touch with the newer models. Suggest you expand your horizons a bit ...best advice is try both on back to back dives and the decision is simple to switch.
 
Paul S said:
My brain isn't going to take in the number of flashes as i concentrate on something else.
Click to expand...

You haven't tried one have you? :-) (no insult)

Within an hour you'll be ignoring it... until the PPO2 changes, neither you or your brain needs to count- its like knowing you have 2 hands, you don't need to keep checking!
 
Ben Field said:
You haven't tried one have you? :-) (no insult)

Within an hour you'll be ignoring it... until the PPO2 changes, neither you or your brain needs to count- its like knowing you have 2 hands, you don't need to keep checking!
Click to expand...
No. I openly admitted that. I'm happy to be wrong. Maybe I'll switch my dream into its pseudo-smithers mode and give it a go. ;)

Not the same as having a 3 cell hud, but it'll give me an idea of what is like.
 
Mark Chase said:
Size and weight is an interesting one as id say the JJ is not that heavy. The JJ defo feels lighter than the SS Mini rEvo I had but the Micro? I have never dived.

Again the Micro and trim is unknown to me but the Mini SS is way too heavy for wet suit diving. My JJ with an Ali Back plate and zero lead is perfict fo my 5mm going on 3mm wet suit. The rEvo Mini never had any weight reduction option but obviously the Micro would be lighter
Click to expand...

Hi Mark

The Micro FT is a titanium unit! It is about 2,7kg lighter than the mini stainless steel unit.

/Christian
 
alexasigno said:
What makes the maintenance easier for you?
Click to expand...

Hi Alex,

Maintenance alot easier to clean and prep each dive, only need to remove 1 wing nut to access both lungs and scrubbers , and then 2 threads to remove the entire loop.

JJ required 4 x the work:
4 fittings at the T pieces, Removal of 2 backplate wing nuts, 1 x O2 solenoid fitting, 1x O2 Add Fitting, 1x Dill fitting, and 1x BOV Fitting. And then the huge PIA of trying to remove the head that always was stuck on too tight.
 
"And then the huge PIA of trying to remove the head that always was stuck on too tight.

Are you kidding me ? , i can lift it out whit one finger...after pusching the button.
 
Remco said:
"And then the huge PIA of trying to remove the head that always was stuck on too tight.

Are you kidding me ? , i can lift it out whit one finger...after pusching the button.
Click to expand...
lol... But a good fantasy none the less. With a full positive most JJs I have seen still need a good nudge to remove the head.
 
Last edited:
you can try to make fun of me , but it is tru.

And why the are you trying to remove the head whit a full positive ?
I remove all the pressure and hoses ,
just pusch the button and lift the head .... no problem at all... just pusch the button the head pops out and i can lift it out whit one finger.....

i found this movie https://www.youtube.com/watch?v=exlLFjGWSO0
this is stupid ...every diver knows a O-ring under pressure will hold everything in place..
 
Last edited:
Remco said:
you can try to make fun of me , but it is tru.

And why the are you trying to remove the head whit a full positive ?
I remove all the pressure and hoses ,
just pusch the button and lift the head .... no problem at all... just pusch the button the head pops out and i can lift it out whit one finger.....

i found this movie https://www.youtube.com/watch?v=exlLFjGWSO0
this is stupid ...every diver knows a O-ring under pressure will hold everything in place..
Click to expand...
I don't believe you know what your talking about. But happy you seem to have one of the only JJs where you can remove the head easily.
 
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