I've been told, perhaps erroneously, that diaphragm regulators are 
less tolerant of having water blown through the first stage then 
piston regs.


James Dibbs wrote:
~
>Why is it a problem blowing water through a diaphragm first stage?
>
>Does a piston first stage not have this problem?
>
>I thought one of the reasons for using Apex (other than the front cap
>removal without tools) was that you could change the first stage to a
>different tank underwater.
>
>James Dibbs
>Sydney, Australia
>
>-----Original Message-----
>From: Paul Braunbehrens [mailto:Bakalite@ba*.co*]
>Sent: Monday, 29 October 2001 14:34
>To: Trey; terry michael; Lee Bell; techdiver@aquanaut.com
>Subject: RE: Re: Scout bulbs
>
>
>The problem is finding a good replacement for the mk20 G250 combo.
>Since you don't want a diaphragm reg on a stage, in case you have to
>swap regs and flood the first, what can you do?  I love my Apeks for
>backgas, and being able to get the service kits is great.  I don't
>even dare open up the mk20, I have no parts, you need special tools,
>blah blah blah.  Anyway, Trey, if you know something else that works
>well, let us know.
>
>Cheers.
>
>
>Trey wrote:
>~
>>Terry, I don't know about the 380, never had one, but I do know that the MK
>>20 has a ridiculous shim system for adjustment. If you do not take the
>shims
>>out, the pressure is way too high, and even after you do, you can not get
>it
>>down to 120 on most of them. Even when you do get the pressure down to an
>>acceptable level it does not last long, and begins to come back up again.
>>Some of our guys have tried altering the spring by compressing it for a
>long
>>time in a vise (futile bullshit), but most of our guys did the right thing
>-
>>Ebay, under the PT Barnum Theory.
>>
>>I still have some , but i use them as safety bottle regs since they do last
>>being left in water,I can operate the valve when, not if they fail,  and
>the
>>only way a G 250 will work twice in a row is if it is not allowed to dry
>>out. An expensive mistake, even at the price of 125 charged to me by Scuba
>>Pro for each set. I still got fucked if you add in the repair bills.
>>
>>Any new purchases by me are Apeks or Oceanic ( they have a some reliable
>>stuff that has lasted me with no problems). I have no repair parts for
>>either Apeks or Oceanic, and have never needed any. For Scuba Pro I have a
>>huge bag of parts given to me by the Navy when they threw in the towel on
>>this crap. I have had to use most of them and spent some 600 bucks last
>year
>>alone getting these things fixed.
>>
>>
>>-----Original Message-----
>>From: terry michael [mailto:OEA51@go*.co*]
>>Sent: Sunday, October 28, 2001 10:12 AM
>>To: Lee Bell; Trey; techdiver@aquanaut.com
>>Subject: Re: Re: Scout bulbs
>>
>>
>>>stainless plate and 18 lb lift wing, breath the long hose on a Scuba Pro
>>>Mk-20/G250 with a R380 on a necklace.
>>
>>R380? Isn't that great little performer a stroke reg? It's a dead give away
>>in my opinion, R380 = STROKER. How many spacers you got in the Mk20's
>>anyway? ..he he he ;-)
>>
>>-----Original Message-----
>>From: "Lee Bell"<leebell@ix*.ne*.co*>
>>To: "Trey"<trey@ne*.co*>, techdiver@aquanaut.com
>>Date: Wed Oct 24 06:31:54 PDT 2001
>>Subject: Re: Scout bulbs
>>
>>>Trey wrote:
>>>
>>>>   "heat from shorted batteries" ?
>>>
>>>Yep.  Heat from shorted batteries.  It's a pretty routine event.  Salt
>>water
>>>shorts the battery and, presto, it heats up.  It's a pretty well known
>>>problem.  I'm surprised you didn't know about it.
>>>
>>>>   Hello, Mom? Lee, have you ever actually been diving, and do you have
>any
>>>>   experience with anything other than getting on dive lists and saying
>>>stupid ,
>>>>   misinformed, ridiculous things and then trying to pretend you know what
>>>you are
>>>>   talking about?
>>>
>>>Hello, Trey?  Did you forget that some of us dive in salt water?
>>>
>>>You seem to have a short memory or, perhaps, don't bother to read what
>  >>others have to say, so I'll repeat it for you.  Yes, I go diving.  I
>>started
>>>in 1962 after a home course given by a YMCA instructor and have been
>active
>>>every since.  My first card came from NAUI in 1969 when it became hard to
>>>get air without one.  I did my cave diving back in the mid to late 60s.
>It
>>>was nothing like what you're doing now, but it was extreme for
>recreational
>>>divers of the time.  I do something in the range of 50 dives a year.  I
>>>didn't record anything for the first 30 years and am still not real good
>>>about doing so.  I've had a boat of my own since I was 6.  If I count my
>>>kayak and inflatable, I have 4 diveable boats at the moment and have made
>>an
>>>offer on another.  I live in the same county as you do, know some of the
>>>same people and, when I use a commercial operator, dive off of some of the
>>   >same boats you do.  I dive almost exclusively salt water.  I have a
>Haclyon
>>>stainless plate and 18 lb lift wing, breath the long hose on a Scuba Pro
>>>Mk-20/G250 with a R380 on a necklace.  I have two scout lights on the
>>>harness at all times.  I also have a Halcyon aluminum plate that I'm
>>>configuring for dive travel.  All of this was purchased from a store you
>>>know well, it's right next door to the Southport Raw Bar.  Remember the
>>>place?  It's called Brownies.
>>>
>>>My Scout light flooded, so did another posters.  When mine did, I went
>back
>>
>>>to Brownies.  They are the ones who told me about the problem reflectors
>>>from UK.  I didn't come up with it, I just repeated it here.  I also said
>>>that the light is robust and that it was replaced promptly as I expected
>it
>>>would be.  I believe I had some nice things to say about the light, the
>>>shop, the the manufacturer and the CEO of the company.  Which of these do
>>>you not agree with?
>>>
>>>>   I know the history of all of these pieces of equipment and am involved
>in
>>>>   the evolution of every one of them. Just to correct your other piece of
>>>>   bullshit, there are two basic similar light heads that those guys make,
>>>and
>>>>   one will not fit where the other is designed to go - at all.
>>>
>>>Well, then I suppose the folks at Brownies were wrong.  Be sure to tell
>>them
>>>next time you stop into the shop.
>>>
>>>>   The problem is as I was saying, and a leaking light needs to be
>returned
>>>or thrown
>>>>   away, not taken on dives.
>>>
>>>You seem to be having a problem with reading.  Nobody, and certainly not
>>me,
>>>said that a leaking light should be taken on a dive, ever.  I said I
>>>returned mine and it was replaced.  It seems that we agree on a key
>>element.
>>>Not bad for a moron.  Perhaps you throw away $80 lights that fail, but
>most
>>>of us prefer to return them for a refund or replacement, as I did.  It
>also
>>>seems that I have a higher opinion of the Scout light than you do.  I
>don't
>>>expect a light that expensive to fail the second time it hits the water,
>as
>>>mine did.  I expected the light to work consistently and reliably
>>>specifically because it was developed for an environment that is
>>unforgiving
>>>of equipment failures and is manufacturered by someone who appears to care
>>>about the quality of his products.  When the light did not live up to my
>>>expectations, I looked into why and got an answer that satisfied me.  If
>it
>>>had not, I would not be using Scout lights today.  If the answer is wrong,
>>>then perhaps I should stop using them now.  Is that your recommendation?
>>>Tell me quickly because I'm about to introduce another diver to equipment
>>JJ
>>>makes and if there's a quality problem, I'd like to know about it.
>>>
>>>>   You are not, do not, and have never been involved in anything but
>>bullshit
>>>>   on the web. You are the best example of what Capt JT is always
>>complaining
>>>>   about .
>>>
>>>No, I'm the best example of what you are always complaining about, a diver
>>>who bothers to think for himself and make his own informed decisions on
>>>equipment and diving issues.  You're just going to have to live with the
>>>fact that not everyone thinks that blindly following another, even if it's
>>>you, is a real great idea.  I've learned a lot directly and indirectly
>from
>>>members of your team, but since I have no desire or expectation of joining
>>>your team, you'll just have to get over the fact that I can and will think
>>>and decide for myself.
>>>
>>>Lee
>>>
>>>--
>>>Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
>>>Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
>>
>>
>>___________________________________________________
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>>Get Your Free, Private E-mail at http://mail.go.com
>>
>>
>>
>>
>>--
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>
>
>--
>Paul B.
>--
>Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
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-- 
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