We Need More Power!

So, we had a unique power source for field day.  A hydrogen fuel cell.

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There’s a bank of lead acid deep cycle batteries under the fuel cell.  The cell basically acts as a battery tender charging the batteries and supporting the load while it is on and then turning back off when the batteries are full.

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We ran a 48V DC bus (see the extension cord coming out on the left) ran that back into the communications trailer.  This decreased the I2R losses (see also here for info) from the longer cable run.  Within the trailer was a DC to DC converter that put out 13.8V for all of our communications equipment and we also had adapters to run our laptops and other equipment.

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It actually was quite effective and we started with an “empty” tank and still ran for over 8 hours on it.  The calculations are we could run for over 48 hours on a single tank of hydrogen.  The cell its self has a rating of 1KW and we actually did get it up that high, however I didn’t get a picture of it.  The fuel cell was running like mad because we left it off after out thunderstorm to let things dry out.

In the mean time we kicked back into operational mode meaning 2 radios fired back up plus their associated computers and associated equipment for digital operation.  All just running off the batteries without the Fuel Cell maintaining them when necessary.

Our clue to go turn the cell back on was when the low battery alarm went off in the trailer indicating the 48V supply was starting to drop.  We did also have a 12V batter on the other side of the 48V to 12V converter in the trailer.  This was to add extra isolation for surging loads (radios).

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The fuel cell worked great and was always fun when someone would brag about running off of solar.  Yeah, well we’ve harnessed the power of molecular bonds!

For those who don’t know how fuel cells work, the basic premise is that the electron from hydrogen is forced through the circuit as the proton mates with the oxygen to form water.

Now some would call this a wonderfully green technology, however that hydrogen has to come from somewhere, and most often than not it’s through electrolysis.

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*Also as an aside since the wife and I were just talking about it.  If you’re a ham, do not use the term kilo-watt for phonetics.  The word you’re looking for is kilo.  Kilo-watt is very confusing because it is a compound word.  Are you saying K or KW?  Other’s do use the term watt for W, which while incorrect can further add to confusion.  Seriously, the IACO/NATO/ITU phonetic alphabet was developed specifically to limit confusion.  If your word choices were so great, why haven’t they adopted them?

You may think it’s neat and cute, but at least in the case of the wife and I, we slow way down to deal with your choice of phonetics.  I am reasonably sure that I am not the only one who has been confused by this usage.  It’s hard enough to dig phone messages out of the weeds, why add a bit of extra confusion to the conversation.  But that’s just my two cents, take it for what its worth.

Barron is the owner, editor, and principal author at The Minuteman, a competitive shooter, and staff member for Boomershoot. Even in his free time he’s merging his love and knowledge of computers and technology with his love of firearms.

He has a BS in electrical engineering from Washington State University. Immediately after college he went into work on embedded software and hardware for use in critical infrastructure. This included cryptographic communications equipment as well as command and control devices that were using that communications equipment. Since then he’s worked on just about everything ranging from toys, phones, other critical infrastructure, and even desktop applications. Doing everything from hardware system design, to software architecture, to actually writing software that makes your athletic band do it’s thing.

About Barron Barnett

Barron is the owner, editor, and principal author at The Minuteman, a competitive shooter, and staff member for Boomershoot. Even in his free time he’s merging his love and knowledge of computers and technology with his love of firearms. He has a BS in electrical engineering from Washington State University. Immediately after college he went into work on embedded software and hardware for use in critical infrastructure. This included cryptographic communications equipment as well as command and control devices that were using that communications equipment. Since then he’s worked on just about everything ranging from toys, phones, other critical infrastructure, and even desktop applications. Doing everything from hardware system design, to software architecture, to actually writing software that makes your athletic band do it’s thing.
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3 Responses to We Need More Power!

  1. Jake says:

    I learned the NATO phonetic alphabet in Civil Air Patrol and the aviation classes I took, but our dispatchers and police officers use the LAPD phonetic alphabet, and it drives me batty.

    I won’t say there’s anything wrong with it – it’s at least standardized, and it apparently works well enough to have lasted 50+ years – it just drives me nuts, because it’s just, well, wrong. :)

    • Yeah, my biggest complaint is there are a lot of people who deviate from it off the bat. It makes sense if standard phonetics aren’t doing the job to try a different one. QRM is a problem and pretty dynamic, sometimes different words will work better.

      That said, try the standard method first then move to alternate options if I continually come back asking for a repeat.

      Yes the bottom line is to get the message through, what good does that do when you’re adding extra letters that then have to be filtered back off?

      But alas I’m ranting again.

      Yeah I feel your boat though Jake. I find myself using what ever comes first from the LAPD, NATO, or common HAM codes. Usually the NATO code wins,rarely does the HAM code win unless I’ve been doing a lot of DX work all weekend.

  2. North says:

    Huh? Watt?

    Dang it. I’m out of practice and screwed up a few. Time to relearn the alphabet, again.