highaltitude.log.20140314

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[00:23] <g0pai_ian_> Interesting bit of info. If you have a UK full licence, then in the US you will be afforded full licence privileges there, but if you subsequently take a US technicians licence, then it trumps your UK licence and you lose a lot of your privileges over there . . .
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[00:25] <craag> Presumably you could still use your W7/G... callsign
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[00:34] <g0pai_ian_> Not if you also had a technicians licence, the US one would trump it. So a lot of work to get a lot less.
[00:35] <g0pai_ian_> Unless you were going to be more than an infrequent visitor the benefit is to do nothing and use your UK full licence privilege to get the same there.
[00:35] <g0pai_ian_> W7/G. . . as you said.
[00:37] <g0pai_ian_> I'm not sure if you are able to obtain a US reciprocal licence on the basis of a UK full licence without having to do any exams, not just the W7/G CEPT type of arrangement.
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[00:39] <g0pai_ian_> A bit like having an international driving licence and a US one and when pulled over for speeding you try to get away with handing over your Int driving licence instead of the US one!
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[08:13] <amell> my Watson WSM-270 antenna arrived last night, finally i can listen to balloons, but unfortunately there appear to be none scheduled
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[08:13] <Upu> You won't have to wait long amell
[08:13] <mfa298> amell: they don't always get announced until the last minute.
[08:14] <Upu> its Friday
[08:14] <amell> in which case i shall take it to work in the car with me.
[08:14] <Upu> which means there is a high percentage chance LeoBodnar will throw one up
[08:15] <amell> on a friday? a bit like a friday night pint i guess.
[08:15] <Upu> foils usually
[08:15] <Upu> where are you ?
[08:15] <amell> Elsworth
[08:16] <Upu> oh ideally placed
[08:16] <amell> yes, unfortunately i was without antenna when steve sent up loads.
[08:16] <Upu> could have made one from some wire
[08:17] <Upu> http://ukhas.org.uk/guides:payloadantenna?s[]=payload&s[]=antenna
[08:17] <Upu> just upside down
[08:17] <Upu> or technically the right way up, they are upside down on the payloads
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[08:20] <fsphil> hehe
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[08:38] <cm13g09> final day in one job - out of here 4:30 today - and then off to join the world near mfa298, craag, mattbrejza and co.
[08:42] <fsphil> scary!
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[08:49] <cm13g09> fsphil: yeah - you could say that
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[08:53] <LeoBodnar> morn
[08:53] <ibanezmatt13> morning
[08:54] <WillDWork> morning
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[09:00] <craag> morning cm13g09
[09:02] <mfa298> fsphil: I assume you mean scary for craag, mattbrejza, myself and co. with cm13g09 coming to this part of the world :p
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[09:05] <fsphil> haha
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[09:06] <craag> cm13g09: In a denis lab... with no lab notes.. and no denis..
[09:07] <craag> and Helios_STOLEN is meant to be demonstrating.. also awol
[09:08] <Helios_STOLEN> lab doesnt start till 10:00
[09:08] <craag> erm
[09:08] <mfa298> that's really taking the POETS mantra to a new level
[09:08] <craag> we're all in here..
[09:08] <Upu> lol
[09:09] <Helios_STOLEN> Lab is running in 2223 level 2 Zepler 1000-1100
[09:09] <cm13g09> craag, Helios_STOLEN, can you please agree on a timezone!
[09:09] <Helios_STOLEN> that is the info I have from DO and Denis
[09:09] <cm13g09> Helios_STOLEN: Knowing Denis, he probably meant 0900 :P
[09:10] <craag> A wild denis has arrived..
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[09:12] <fsphil> run away!
[09:17] <cm13g09> fsphil: You haven't met Denis
[09:17] <fsphil> haven't
[09:18] <fsphil> he could probably outrun me, I'd have to stay and fight
[09:19] <Helios_STOLEN> craag - so is the lab now? if so, will be there asap... but i was expecting 10am as the emails said...
[09:21] <craag> Helios_STOLEN: It is now, Denis has just set us up and disappeared off to write the lab notes.
[09:21] <craag> I don't know if he wanted you along later just to mark?
[09:22] <Helios_STOLEN> ...
[09:23] <Helios_STOLEN> i cant get ready anyway, nikolay is in the shower, lol
[09:25] <fsphil> oh yea, it's Pi day in countries with a backwards date format
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[09:35] <cm13g09> yay - just had the flat (rental) completion documents through :)
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[10:00] <mfa298> for the backward countries Pi day would be more accurate next year.
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[11:24] <Babs____> Would be interesting to fly this and see what it comes up with / whether it cuts out beyond a certain altitude. For 20g it's a winner www.maplin.co.uk/p/nikkai-gps-travel-photo-tracker-a41jf?utm_source=newsletter&utm_medium=email&utm_term=14P3_W3_D5&utm_content=Product-8&utm_campaign=14P3-18
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[11:50] <Lunar_LanderU> hello
[11:50] <craag> Mornign Lunar_LanderU
[11:50] <craag> *Morning
[11:51] <craag> I should write a plugin that tab-completes 'Morning'... I try to do it often enough
[11:53] <mfa298> you could probably sell it to lots of people
[12:00] <fsphil> Or Mor<tab> automatically adapts to the time of day
[12:01] <mikestir> isn't there some rule that it's always morning when you join irc and always night when you leave?
[12:01] <mikestir> http://thinkmoult.com/ugt.html
[12:02] <mfa298> unless your a CS student when it's probably night when you join and morning when you leave (unless things have changed since I was a student)
[12:02] <craag> lol
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[12:13] <fsphil> I hasn't seen this before, nice bit of work: http://chris-stubbs.co.uk/wp/?p=295
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[12:16] <g0pai_ian_> So, on Dave's Buzz/Zorb pair yesterday, what was the physical separation between the two tx/ant/ Was it a second package on the payload train?
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[12:18] <craag> g0pai_ian_: From seeing dave's stuff previously - it would have been 2 seperate packages seperated by a couple of meters
[12:18] <daveake> very close in the same payload
[12:18] <craag> oh
[12:18] <daveake> :)
[12:18] <craag> corrected :P
[12:19] <mfa298> fsphil: I remember Chris doing some tests like that but can't remember that write up. Interesting stuff - well done that man!
[12:19] <daveake> It was a bit tight in there with cameras in the way of the signal, so I expect it faded as it turned
[12:19] <mikestir> fsphil: I'd made that observation as well when testing WGGS1 trackers in the freezer. I sprayed them with lacquer
[12:19] <mikestir> they both seemed to behave ok
[12:20] <g0pai_ian_> Hi, all. Dave how about the separation of the antennas, one above and one below, feeding the top one confuses me a little
[12:20] <daveake> This time they were next to each other, horizontally, less than 1/4 wavelength apart
[12:21] <g0pai_ian_> Right, so a shared ground plane?
[12:21] <daveake> well, the ground planes went alongside each other
[12:21] <daveake> Not electrically connected
[12:22] <g0pai_ian_> Effectively shared, magnetically !
[12:22] <daveake> yeah
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[12:22] <daveake> I did do one with basically a wide groundplane shared between 2 transmitters
[12:23] <g0pai_ian_> Sorry to be so nosey Dave, not an IP bandit, but just like to get to the bottom of things I don't understand . . . the pit is Veeery deep!
[12:23] <daveake> np
[12:23] <eroomde> i don't think there's much IP to steal in HAB :p
[12:24] <daveake> For a regular flight like this, where there are many listeners not that far away, you're not that bothered about range or fading so lots of non-optimal configurations will work well enough
[12:24] <daveake> hah
[12:24] <db_g6gzh> I'm surprised it didn't fade more, it wasn't too bad really.
[12:25] <db_g6gzh> and I assume what you actually typed was poiny instead of point 8-)
[12:26] <g0pai_ian_> Next question, I reported that during the descent at around 24km the cyclic nature of the fading on one of the tx. G8DHE asked about the cyclic period, obviously the package was spinning and one antenna was more central than the other. Without a gyro is there any useful way of balistically stabilising the package, without encroaching on Ed's territory?
[12:27] <g0pai_ian_> Freezing honeycomb, the practice is to put the comb into a sealed plastic bag, so that upon defrosting there is no condensation inside the bag.
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[12:29] <g0pai_ian_> I take it that the RFM22B dew point problem was believed to be external to the crystal package rather than within. Maybe packaged in Singapore without the benefit of aircon . . . :-)
[12:29] <Geoff-G8DHE> More likely the PCB itself than inside the Xtal ?
[12:30] <g0pai_ian_> Nice flight by the way Dave. Must get the netbook connected up and start to contribute to the tracker net.
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[12:49] <fsphil> a lower gain antenna on the payload may cause less fading, but obviously a weaker signal overall
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[12:53] <gonzo__> the limits are isotropic, so a lower gain ant you can drive with more tx power
[12:53] <fsphil> that's true
[12:53] <gonzo__> si idally looking for the cleanest pattern antenna
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[12:54] <gonzo__> clean in the angloes of tilt that we expect anyway
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[13:01] <amell> still no planned flights?
[13:02] <fsphil> hehe. no
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[13:10] <StudentDeNayer_> Would it be best to power my extra hardware from the avr or from the power directly ?
[13:10] <fsphil> by avr do you mean the microcontroller itself?
[13:11] <fsphil> or something like an arduino board?
[13:11] <StudentDeNayer_> A atmega 328p chip
[13:11] <fsphil> I wouldn't recommend powering anything directly from the chip
[13:11] <fsphil> except maybe an LED or three
[13:11] <fsphil> depends on the hardware I guess
[13:11] <fsphil> you'll definitly not want to be powering a GPS module from a GPIO pin
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[13:12] <StudentDeNayer_> okaj thanks :)
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[13:32] <mfa298> Is the Baofeng UV-5R really that sensitive (as suggested on the mailing list) or is it about as good as the rtl-sdr (which is cheaper and does ssb)
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[13:36] <fsphil> I've found the uv3r to be fairly sensitive, but easily overloaded
[13:36] <gonzo_mob> i've used the us version with 220meg and yes very sensitive
[13:36] <craag> mfa298: The AFSK is only 1kbaud, at 100mW, with 1/2 FEC
[13:38] <mfa298> I was assuming it's probably about as sensitive as most other handhelds (although it's not so easy to compare fm handhelds to the good ssb receivers)
[13:39] <craag> Yeah they are pretty good, not as selective as some, but that's rarely an issue.
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[13:46] <eroomde> there are some decentish ssb handhelds too
[13:46] <eroomde> maybe sending the odd afsk packet could be helpful, for mobile recovery
[13:46] <eroomde> handheld + phone, say
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[13:47] <eroomde> http://clojure-android.info/
[13:47] <eroomde> i could weep with excitement
[13:48] <eroomde> not actually that much really, just the potential of the jvm compatibility is the nice thing
[13:50] <mikestir> mfa298: I've got the UV-B5, which was supposed to have a better front end than the 5R. It's fine on 70cm but has serious selectivity issues on 2m
[13:51] <mikestir> it's pretty much unusable if you are near a pager transmitter
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[13:52] <mfa298> eroomde: I've got a 2/70 handheld that also does wideband receive with ssb but I'd reckon it's similar in performance to the rtl-sdr's (at least for SSB reception).
[13:53] <mfa298> not that I've done any particularly scientific tests on it - it's easier to use the fcd P+ or FT817
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[14:11] <gonzo__> even the single band radios of 90's were useless around pager tx
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[14:11] <gonzo__> I used ton live 100yds from one. the old FT23 was flattened
[14:12] <gonzo__> though the pmr version of it seemed better (it had varicap tuned front end and higher freq if)
[14:16] <g0pai_ian_> You need brick wall filtering in close proximity to pagers etc.
[14:17] <g0pai_ian_> Coax stubs may be good . . . until you move and the problem is slightly different.
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[14:18] <fsphil> my big problem for radios on my colinear is tetra
[14:19] <gonzo__> I have a 5pot helical filter for getting rid of pager muck.
[14:19] <fsphil> I've a yaesu vx7r that is basically deaf when plugged into that antenna
[14:19] <gonzo__> I thought they would have all bee binned by now though
[14:23] <mikestir> I should probably add that by "near a pager transmitter" I mean "anywhere"
[14:24] <mikestir> it suffers far worse than I'd expect, and I'm fully aware of how much of a problem pager transmitters are
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[14:27] <gonzo__> what are pagers still used for?
[14:28] <gonzo__> the olny application I know of are doctors and fire call outs
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[14:28] <gonzo__> the local hospital have their own system
[14:29] <gonzo__> but most pagers are 100W tx, hence the prob
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[14:34] <Miek> around here there's loads of hospital stuff going over pagers, also monitoring of servers seems to be popular
[14:34] <Miek> it's kinda scary how much personal information is going around on the hospital stuff
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[14:37] <fsphil> yea the last time I monitored the pager signal it was all servers and people dying
[14:43] <gonzo__> servers dying
[14:43] <myself> rebooting patients
[14:44] <myself> backup kidney in prefail state
[14:44] <mfa298> want to be careful you dont mix the two up. Kicking the patients probably isn't a good idea :p
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[14:48] <gonzo__> core dump could cause confusion
[14:49] <myself> something something hot-swap your mother
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[14:57] <amell> You can read hospital pagers? how? Addenbrookes is next to my work...
[14:58] <gonzo__> what a relief for patients that we don't use floppies any more!
[14:59] <gonzo__> I worked there a while ago. They were comissioning a new building , part of the ct scaning (?)
[14:59] <gonzo__> they forgot about me and I got locked in
[15:00] <eroomde> amell: you're v well located for hab
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[15:01] <eroomde> cambridge was *the* uk centre of hab and is still probably among the most active
[15:04] <daveake> lol poor Steve on list
[15:07] <Upu> if anyone wants to do some detective work I need to know how tall the green thing is here :
[15:07] <Upu> http://www.puertolazarocardenas.com.mx/plc25/malecon-de-la-cultura-y-las-artes
[15:07] <Upu> http://goo.gl/maps/4xt3d
[15:09] <amell> looks like a tall green thing to me.
[15:10] <Geoff-G8DHE> Need a time for the photo then its easy!
[15:10] <Geoff-G8DHE> and date
[15:11] <Upu> haha
[15:11] <Geoff-G8DHE> Have yoy tried wikipedia ?
[15:11] <Laurenceb__> why?
[15:11] <Oddstr13> Upu: looks like an obelisk :P
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[15:12] <Upu> just because
[15:12] <amell> Upu: its 42m high.
[15:12] <Upu> source ?
[15:13] <amell> me
[15:13] <amell> I'm fabled for my google skills
[15:13] <Upu> citation
[15:13] <Upu> :)
[15:13] <amell> http://www.puertolazarocardenas.com.mx/plc25//plc25/news/460-christmas-lights-at-the-culture-and-arts-waterfront-switch-on
[15:13] <Upu> super
[15:13] <Upu> thx
[15:13] <amell> now you have to explain why you need to know...
[15:13] <Upu> in a bit
[15:13] <Upu> just doing some maths
[15:14] <daveake> I can guess :)
[15:15] <db_g6gzh> hmm 42 is always the answer 8-)
[15:15] <db_g6gzh> Upu: stuff arrived, thanks
[15:15] <Upu> cool thx
[15:20] <db_g6gzh> Just reading the list - nice comments about the "cheap crap" on the RFM22B just after I bought one 8-)
[15:20] <db_g6gzh> and yes, I know what to expect
[15:20] <eroomde> :)
[15:20] <eroomde> they all work
[15:20] <db_g6gzh> they are cheap after all
[15:21] <Willdude> What is the benefit of zero-indexing? I've heard a load of places saying it's good but none saying why.
[15:21] <Upu> db_g6gzh they do work
[15:22] <Upu> just don't cold soak them
[15:22] <Upu> I've launched loads
[15:22] <Upu> the drift isn't an issue at all
[15:22] <bertrik> Willdude: easier to calculate an address from an index, I guess
[15:23] <db_g6gzh> Upu: I'm not complaining, just found it amusing
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[15:23] <Upu> I've replace the crystal on a few
[15:26] <mfa298> Willdude: computers generally count from 0 rather than 1 (0 all bits off to (2^n)-1 all bits on)
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[15:28] <amell> Upu: still waiting
[15:28] <Upu> I can't say at this time
[15:29] <eroomde> Willdude:
[15:30] <eroomde> note that he was never short of opinions
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[15:33] <db_g6gzh> given the price of the VCOCXOs we used in Tetra base stations (sorry fsphil) a Tx for under a tenner is fine
[15:34] <db_g6gzh> though we did share that source among mulltiple transceivers
[15:36] <Laurenceb__> ill just leave this here
[15:36] <Laurenceb__> http://end-of-show.blogspot.co.uk/2014/03/hoax-malaysia-airlines-flight-missing.html
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[15:47] <daveake> Nah, I found it ... http://minus.com/i/G9flXwN4oY0E
[15:48] <Laurenceb__> http://www.boston.com/news/source/2014/03/9_crazy_conspiracy_theories_about_malaysian_airlines_flight.html
[15:48] <Geoff-G8DHE> :)
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[15:52] <amell> I don't think this plane has crashed. Everyone is having a party somewhere.
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[15:55] Action: Geoff-G8DHE Missing Larkhill Sonde sploshs into the sea off Portsmouth
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[15:57] <amell> where do all these lost sondes go?
[15:57] <eroomde> the ocean gods
[15:57] <amell> never to land?
[15:57] <myself> long time passing..
[15:58] <Geoff-G8DHE> In this case http://360.g8dhe.net/HAB_Flights/2014_Flights/Sondes/J4143769.jpg
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[16:02] <Geoff-G8DHE> Pretty calm up there today http://360.g8dhe.net/HAB_Flights/2014_Flights/Sondes/J4143769wm.jpg
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[16:12] <mfa298> eroomde: good reply about the 808 and gps.
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[16:15] <eroomde> yes i was even nice about mike's point
[16:15] <eroomde> even if i thought it was stupid
[16:15] <eroomde> i can be politic, you see
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[16:25] <g0pai_ian_> What is the favorite type of battery connector for Lithium Iron Disulphide cells, assuming that they have no tags to solder to?
[16:26] <craag> Scratch the ends, add some flux, and they'll solder fine.
[16:27] <g0pai_ian_> Tnx, and for the immediate connection before flight, just plug in a skinny connector?
[16:27] <craag> Yeah, like the RC battery connectors.
[16:28] <craag> (something that won't come apart when bounced around)
[16:29] <eroomde> <something about strais>
[16:29] <eroomde> stairs*
[16:29] <myself> Even on a nice stable chemistry like that, you still want to minimize the heat effects of soldering.
[16:30] <myself> Scuff the surface, use a very hot iron and lots of flux, tin the end, move away, let it cool completely while you strip and tin the wire. Only once both pieces are tinned, bring together again, flow the solder and call it done.
[16:30] <daveake> hot iron / big bit / scratch surface / flux / be quick
[16:30] <eroomde> JBC irons are good
[16:30] <g0pai_ian_> Yes, I have that message nice and clear, both about the forces involved and about the no fannying around during the soldering..
[16:30] <myself> Yup. Faster you can work, the better.
[16:31] <g0pai_ian_> That was JBC, or the bigger JCB? :-)
[16:31] <myself> Other than that, a cap-discharge spot welder would be a fun project, if you have the time. Philpem's schematic seems to be the canonical hobbyist design.
[16:31] <eroomde> JBC :)
[16:32] <eroomde> i saw someone solder a 2p coin onto a sheet of copper-clad with a jbc iron, just as you'd solder dows a row of smd pins
[16:32] <eroomde> just a perfect little fillet all the way around
[16:32] <g0pai_ian_> I watched a video of a French guy making thermionic valves a few years ago and he had a wonderful spark welder, which I thought was cool
[16:32] <eroomde> and the same iron with the same tip would be just as good for then doing the smd stuff
[16:32] <eroomde> their thermal response is magically good
[16:32] <eroomde> i'm saving up for one
[16:33] <eroomde> just once i have the house...
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[16:37] <g0pai_ian_> I had a hobby once and nowhere to do it. I got married, had somewhere to do it and no ££ to follow my chosen pursuit adequately. Kids have their own now and I get to have a hobby and clutter the pace up.
[16:37] <eroomde> i basically want to retire now
[16:37] <eroomde> except i'm 27
[16:37] <eroomde> but, i do have a spare room in the house
[16:37] <eroomde> which might become the electrons lab
[16:37] <eroomde> aswell as the place for the ironing board and for guests to sleep
[16:38] <eroomde> i'm very very slowly collecting nice equipment myself for my lab, as and when it comes up on ebay/craiglist, and funds allow
[16:38] <eroomde> i can be slow because i have a lab at work which does duty for when i don't have something at home
[16:38] <eroomde> so the home lab will be almost all old hp/agilent and other good stuff
[16:38] <eroomde> like the jbc iron!
[16:39] <eroomde> stuff with service manuals that i can repair
[16:39] <g0pai_ian_> I guess that it could be fun leaving things at the bench at your work Ed, whoosh, it goes with the job . . .
[16:40] <eroomde> well there's onyl 2 of us who are into electronics
[16:40] <eroomde> me the student, james the mentor
[16:40] <eroomde> and we sort of have a bench each in the lab
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[16:41] <g0pai_ian_> Ah, so it will be you launching James' watch if he leaves it lying around unattended :-)
[16:41] Nick change: crash_18974_ -> crash_18974
[16:41] <eroomde> it's a bit of a sanctury really, it used to be an ammo/explosives bonded store, so it's lead-lined (good for rf) and the doors are thick and heavy, so when there's workshop noise you can just escape into there
[16:41] <eroomde> and have radio 3 come from a little roberts radio in the corner
[16:41] <eroomde> unless the metal window shutters are down in which case the poor radio has no reception
[16:42] <g0pai_ian_> Don't lick the walls!
[16:42] <eroomde> i try not too
[16:42] <eroomde> but sometimes telecons can be pretty bad
[16:43] <myself> lmao
[16:43] <myself> I love the idea of a shielded room of silence. Hang some acoustic panels on the walls..
[16:44] <myself> Hammock, radiant heater..
[16:44] <myself> White-noise generator, maybe some sunlamps. Yeah, I'll be in the lab for the next 4 hours.
[16:44] <eroomde> the quiet humm of old test equipment
[16:45] <eroomde> actually it's nice to have the window open as it opens onto a field
[16:45] <eroomde> just some birds outside
[16:45] <myself> I think my blood pressure just dropped.
[16:47] <eroomde> infact this is the view from the electronics lab, and almost my office
[16:47] <eroomde> http://www.flickr.com/photos/rocketengines/8003464080/
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[16:50] <db_g6gzh> I've spent some time in a screened RF room (nice copper finger strip around the door seal) and I can't recommend it for long periods 8-)
[16:50] <eroomde> need dem rays
[16:50] <db_g6gzh> of course, it didn't affect my mental state at all
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[17:01] <g0pai_ian_> Nice pics. I worked in a place with a big blast door and after a lock in they opened the door, convinced that the over pressure would keep everyone of safe from nuclear fallout. And the air rushed in . . . Hmmmm!
[17:03] <eroomde> nice
[17:04] <g0pai_ian_> Not as nice as your pies look though. Very creative.
[17:05] <eroomde> i like a good pie
[17:05] <eroomde> i got several meals out of the skylon pie
[17:05] <eroomde> i thought that was appropriate
[17:07] <Willdude123_> Was it a pi pie?
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[17:08] <Reb-SM3ULC> doubble quit
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[17:13] <fsphil> home early on a friday, sun shining outside. perfect time to solder stuff
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[17:19] <Pascend-Ross> Do people ever do evening/night launches to see stars etc?
[17:20] <fsphil> with a decent camera and a sun sheild, you could image stars during the day
[17:20] <fsphil> the sky is dark enough up there
[17:20] <eroomde> but the issue would be getting a payload stable enough to cope with some decently long exposure photos
[17:20] <fsphil> the problem is keeping it steady for long exposures
[17:20] <eroomde> stars are quite unforgiving
[17:21] <fsphil> my idea was to have the camera only expose while the payload is steady
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[17:21] <craag> We've got an astrophotography project here at the uni, but as Phil and Ed say, the bulk of the effort is in the stabilisation.
[17:21] <fsphil> no guarantee though
[17:21] <fsphil> many flights have imaged the moon, venus and I believe jupiter has been imaged
[17:21] <craag> They're currently copying all Babs' designs....
[17:21] <fsphil> lol
[17:22] <Pascend-Ross> ahhh okay cool! :)
[17:22] <gonzo__> however much magnification you have, stars should always appear as a single pixe;
[17:22] <gonzo__> l
[17:23] <fsphil> you'd get some pretty good planetary images at that altitude, if it could be aimed
[17:23] <fsphil> exposure times are short because of the bright target
[17:23] <fsphil> and there'd be almost no atmospheric turbulance
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[17:28] <gonzo__> are the gains from alt enough to overcome the weight lomit? ie, can you improve on what you can do with a moderate scope on the ground?
[17:30] <eroomde> IR
[17:30] <fsphil> uv too
[17:32] <Reb-SM3ULC> how have people been handling the stabilisation on the horisontal plane, i.e. rotation?
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[17:32] <DL7AD> evening+
[17:32] <Reb-SM3ULC> ++evening
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[17:32] <DL7AD> ^^
[17:32] <DL7AD> ping Upu
[17:32] <Upu> evening
[17:33] <DL7AD> Upu: what is the common time packets will travel to germany?
[17:33] <Upu> 3-4 days maybe quicker for Airsure
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[17:35] <Pascend-Ross> We were also thinking about some sort of gyro to mount the gopro, anything like that been done?
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[17:38] <mfa298> Babs is probably the person to talk to about stabalisation and gyros when he's around.
[17:38] <Pascend-Ross> okay thanks
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[17:41] <Geoff-G8DHE-M> Pascend-Ross, The High altitude sets will give you an idea of he's into http://www.flickr.com/photos/91049302@N00/sets/
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[17:45] <Pascend-Ross> wooow, thats high quality stuff!
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[17:52] <Willdude123_> Just inherited a WAP54G from parents after they got a new router
[17:52] <Willdude123_> Anything hammy i can do?
[17:54] <mikestir> use it to prop up your rig?
[17:54] <Willdude123_> Heh
[17:55] <mfa298> stick openwrt on it and see if you can get it doing anything useful over any onboard gpio/uart
[17:56] <mikestir> http://www.dimebank.com/cak/k6dbg/k6dbg_igate.html
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[17:58] <mfa298> if an AP doesn't run openwrt or IOS* it's not a real AP (* Not Apple ios as runs on thier phones)
[17:59] <Upu> WAP54G ?
[17:59] <Upu> place in the bin
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[17:59] <Upu> if it hasn't lost its config it will soon
[18:00] <Upu> maybe even before the PSU dies
[18:00] <tweetBot> @shhmakers: If you want to see 3D Printing, #UKHAS and many even some #LaserCutting, then @AccessSpace is the place be on Saturday!
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[18:00] <cm13g09> mfa298: I have arrived
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[18:17] <fsphil> linksys PSUs fail soooo often
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[18:26] <Laurenceb__> http://www.youtube.com/watch?v=efcjU4tV3yM
[18:40] <Laurenceb__> how can i like to a file using a location relative to the script in matlab?
[18:40] <Laurenceb__> *link
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[20:18] <bertrik> is there anything going up this weekend in the UK?
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[20:23] <gb73d> prices
[20:23] <gb73d> sri
[20:24] <ibanezmatt13> I was supposed to be bertrik but the winds have changed for the worse :(
[20:35] <edusupport> bertrik ?
[20:35] <ibanezmatt13> ping adamgreig
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[21:08] <aadamson> Wow, if I could get a balloon to stay above 25k ft, I could send a balloon west from atlanta today... that *never happens* :)
[21:12] <bertrik> ibanezmatt13: ok thanks for the update :)
[21:12] <ibanezmatt13> np
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[21:22] <mikestir> no friday night C challenge today Willdude123?
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[21:25] <jtbel> Where can i buy balloons similar to polystrene one?
[21:26] <jtbel> Ultra long floati
[21:27] <jtbel> Ultra long floating balloons?
[21:27] <jtbel> Where to buy?
[21:27] <Geoff-G8DHE> Do you mean Latex types ?
[21:27] <jtbel> No
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[21:28] <ibanezmatt13> You can buy the qualtex foil balloons here at the top: http://randomsolutions.co.uk/Random_Aerospace/Balloons.html
[21:28] <jtbel> Ultra thin polystrene
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[21:28] <Geoff-G8DHE> Not heard of them do you have a refrence or link to them ?
[21:29] <jtbel> Polystyrene balloons
[21:29] <Lunar_Lander> hello everybody
[21:31] <ibanezmatt13> jtbel, http://www.grahamsweet.com/balls/balloons/balloon2tn.jpg ?
[21:31] <Geoff-G8DHE> I wouldn't have thought that polystyrene would hold gas, it would loose it thru the granule edges ? Its normally only used for payload boxes.
[21:34] <kc2pit> Polyethylele terephthalate (a.k.a. Mylar), perhaps?
[21:35] <kc2pit> erm, ethylene.
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[21:44] <aadamson> https://www.youtube.com/watch?v=0Zl2GY-Jomg - snake oil! :)
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[21:51] <ibanezmatt13> Can't believe it's been suggested that the 777 disappearance may have been an alien abduction...
[21:52] <Laurenceb> i can
[21:52] <mikestir> I can't believe it's taken them a whole week to realise it was still pinging inmarsat
[21:52] <Geoff-G8DHE> Well what else could it be ?
[21:52] <Laurenceb> yeah
[21:52] <Laurenceb> wtf inmarsat
[21:52] <ibanezmatt13> :)
[21:53] <mikestir> and what about acars
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[21:54] <Geoff-G8DHE> What system on board uses Inmarsat then ?
[21:55] <Geoff-G8DHE> they claim to have discounted that ACARS continued for longer ?
[21:55] <mikestir> well the public phones for one, but I bet there's private data comms as well
[21:55] <Laurenceb> ive just been at the free firework display in derby
[21:55] <mikestir> so they reckon the acars and ads-b stopped at the same time?
[21:56] <Laurenceb> http://i.imgur.com/ZiMfWN3.jpg
[21:56] <Geoff-G8DHE> The release of information seems to be either very tightly controlled or just lots of rumour ..
[21:57] <Lunar_Lander> didn't the engines transmit telemetry?
[21:57] <mikestir> and don't the flight recorders have their own self-contained emergency beacons?
[21:58] <Geoff-G8DHE> During climb and then after that only once or twice apparently but the last I heard was that none after the time of the last message
[21:58] <Geoff-G8DHE> The Black boxes have Sonar and Radio, but Sonar is only about 2Km range
[22:01] <Geoff-G8DHE> This sounds about right no real details given http://www.flightglobal.com/news/articles/inmarsat-confirms-automated-signals-from-mh370-397034/
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[22:06] <Geoff-G8DHE> and if you follow the link to the ACARS info, exactly the same no info given out. despite the fact that the ASir France crash they released details within 3 days ...
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[22:11] <Geoff-G8DHE> and the relase from Inmarsat itself http://www.inmarsat.com/news/inmarsat-statement-malaysia-airlines-flight-mh370/ says nothing really
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[22:20] <Willdude123_> This WAP54G is a bit crap
[22:20] <Willdude123_> Can't connect
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[22:20] <Willdude123_> I could take it apart
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[22:22] <chrisstubbs> wow, this company really dont want you to know what transistors they are using
[22:22] <chrisstubbs> the markings have been filed off
[22:24] <Willdude123_> Might see if i can get a cheap WRT54G
[22:24] <Willdude123_> Just for HSMM
[22:24] <Willdude123_> But I don't know if there are any nodes this side of the world
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[22:27] <g0pai_ian> They maintain now that the 777 may have flown on for up to 5 hours after losing comms (ACARS included), but the engines talk to satellites. Do they mean that they can't figure out what sats could and couldn't hear the darn thing ansd at least reduce the footprint a little.
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[22:27] Nick change: Geoff-G8DHE_ -> Geoff-G8DHE-M
[22:27] <g0pai_ian> People are telling lies and it will be good to hear the truth when it eventually leaks out.
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[22:28] <Geoff-G8DHE> Not sure those who know anything are lying, they seem to say nothing, but every body else misinterprets or creates rumour
[22:28] <S_Mark> Thanks for delaying your flight yesterday daveake - it helped enormously with a presentation we were doing to a school - able to show a live flight!
[22:29] <S_Mark> :p
[22:29] <Lunar_Lander> hello S_Mark
[22:29] <S_Mark> Hi Lunar_Lander
[22:29] <Lunar_Lander> how are you today?
[22:30] <S_Mark> good thank you
[22:30] <S_Mark> you?
[22:30] <daveake> ha :)
[22:30] <Lunar_Lander> well there is the thing
[22:30] <daveake> Such a good place to launch from :)
[22:31] <Lunar_Lander> since today I am officially a B.Sc.
[22:31] <daveake> well done
[22:31] <S_Mark> good work Lunar_Lander
[22:32] <mikestir> g0pai_ian: the bbc report says the inmarsat data should enable them to get a rough location and altitude
[22:33] <Pascend-Ross> nice one Lunar!
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[22:33] <Lunar_Lander> thank you
[22:38] <Geoff-G8DHE> Great news Lunar_Lander
[22:39] <Lunar_Lander> thanks
[22:39] <Lunar_Lander> it is a strange feeling to be a Physicist now
[22:39] <Lunar_Lander> because it has been what I have been doing since 2009 and even before
[22:41] <Lunar_Lander> but it is done
[22:41] <g0pai_ian> Congrats LL, job well done.
[22:42] <Lunar_Lander> next tasks awaiting though, some work on Analog devices, as our electrometer did oscillate all around back then...have to find out more about opamp basics first
[22:42] <Lunar_Lander> thanks
[22:42] <Lunar_Lander> anyways, we had a little party at Uni today: http://s.gullipics.com/image/1/d/h/5yve9k-k5xjft-peyz/IMG1036.jpeg
[22:45] <Lunar_Lander> :)
[22:46] <RocketBoy> Anyone got a suitable alternative to the 12V cigarette light plugs - I found a burned plug from the HAB chase the other day - just due to a poor connection - something that can handle 15A and not catch fire
[22:46] <RocketBoy> lighter
[22:46] <RocketBoy> the din plugs don't look much better
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[22:48] <kc2pit> My default answer to "How do I feed 12V into this thing?" is Anderson Powerpoles. 15A continuous is very comfortable for them.
[22:48] <Geoff-G8DHE> Simple but reliable http://cpc.farnell.com/camdenboss/ctbs431-12m-f/12-way-block-plug-in/dp/CN00143?Ntt=cn00143
[22:48] <daveake> Have a look at the car stereo stuff
[22:48] <daveake> http://www.parts-express.com/cat/high-current-dc-power-connectors/1569
[22:49] <RocketBoy> their interesting - are they single sex?
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[22:50] <Geoff-G8DHE> I reverse alternates and make them polarised, then cut one half into pairs for each device, the other is wired in permanent
[22:50] <Babs_> woaaah. my flickr account stats went nuts today. did i miss anything?
[22:50] <RocketBoy> the power poles - look like the ones used for RC?
[22:51] <kc2pit> I believe the're popular in some RC circles, yeah. And yes, they're genderless.
[22:52] <kc2pit> The 15/30/45A plugs are mutually compatible; the only difference is the wire gague the contacts crimp on to.
[22:53] <Geoff-G8DHE> They do a higher curent version as well
[22:55] <RocketBoy> thanks guys
[22:55] <kc2pit> Yep, the SB50/120/175/etc series. Same concept, but packaged as inseparably paired contacts and much larger sizes. Haven't used them myself, as I have yet to need more than about 30A at a time.
[22:57] <LeoBodnar> RocketBoy: http://uk.farnell.com/jsp/search/browse.jsp?N=2031+203761&Ntk=PLS_MAN_BRAND_NAME&Ntt=neutrik&Ntx=
[22:57] <Geoff-G8DHE> Yup three types up to 57Amps http://www.farnell.com/datasheets/1537721.pdf
[22:58] <LeoBodnar> Neutrik have screw terminals inside. No soldering required
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[23:12] <Geoff-G8DHE> The video from the Peoject Ascend team flight this week https://www.youtube.com/watch?v=Lysls93tLd0&feature=player_detailpage
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[23:14] <Lunar_Lander> cool!
[23:14] <Lunar_Lander> Pascend-Ross, ah if you are still there I have a comment on your launch
[23:14] <Pascend-Ross> hellooo
[23:15] <Geoff-G8DHE> Just seen the video looks good!
[23:16] <Lunar_Lander> yeah
[23:16] <Lunar_Lander> what I would like to say is that it looked like someone just let go of the balloon line, letting the balloon rise and then snapping to a stop and then the box was released
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[23:17] <Lunar_Lander> that was not good, something like this has resulted in a balloon flying away without a payload last year
[23:17] <Pascend-Ross> yep! I think the person realised their mistake as soon as they did it!
[23:17] <Lunar_Lander> yea
[23:20] <Geoff-G8DHE> Was it yourself asking about camera stablisation earlier Babs_ is about I think
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[23:20] <mikestir> Pascend-Ross: isn't there any video of the tractor ride? :)
[23:21] <Pascend-Ross> there is indeed :D we are doing a longer documentary style vid with the hole proccess (pen and paper to driving onto the guys farm) which will have a lot more footage!
[23:22] <Lunar_Lander> cool!
[23:22] <Lunar_Lander> now on DVD and Blu-Ray!
[23:22] <Lunar_Lander> :D
[23:23] <Pascend-Ross> XD
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[23:36] <arko> danielsaul: yo!
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[23:40] <Pascend-Ross> What is the best way to display a map with overlay like it was on spacenear from offline data?
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[23:40] <Willdude123> mikestir: I had a break
[23:41] <Willdude123> Was playing minecraft and using mumble with a load of nice american kids I've never met
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[23:44] <Geoff-G8DHE> Yopu can play with GPS Visulizer http://www.gpsvisualizer.com/ if you need the GE KMZ/KML files they are on Habitat or similar copies on my pages
[23:45] <Geoff-G8DHE> still with us Pascend-Ross ?
[23:45] <Pascend-Ross> yeah, that looks good thanks!
[23:45] <Geoff-G8DHE> Takes a bit of playing with but quite powerful once you dig into it!
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[23:46] <Lunar_Lander> I used this to generate a KML out of my flight records and then put that onto Google Maps
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[23:48] <Pascend-Ross> yeah, It needs to be pretty :)
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[23:51] <Pascend-Ross> wow, that was a lot easier than I expected! http://www.gpsvisualizer.com/display/20140314164827-46242-map.html - it seems kml is my friend :D
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[23:52] <Geoff-G8DHE> Oh you can do better than that! Plot the temps and pressures the lot! at least1
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[23:53] <Geoff-G8DHE> Don't forget the Elevation Profile facility in Google Earth either
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[23:55] <Geoff-G8DHE> http://360.g8dhe.net/HAB_Flights/2014_Flights/HAB55331_20140312/index.php?ind=14 click the larger thumbnail for full details
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[00:00] --- Sat Mar 15 2014