highaltitude.log.20110106

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[03:16] <Zuph> This wiki is ass
[03:17] <stilldavid> why so?
[03:17] <Zuph> Because the White Star team is horrible at internal consistency
[03:18] <Zuph> Good news, though, the wiki should be much more navigable in the coming days.
[03:18] <stilldavid> that's good news I guess, but I never had much trouble with it...
[03:18] <stilldavid> I do search more often than not to find what I'm after though :)
[03:19] <Zuph> heh
[03:19] <Zuph> Yeah, the search option has become the only way to navigate the wiki
[03:19] <Zuph> Even for us
[03:20] <Zuph> So we figured it has to be intimidating to any balloonist (or potential balloonist) wanting to learn from us.
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[03:25] <Dan-K2VOL> stilldavid: Great to hear you're able to glean useful info from the wiki!
[03:26] <stilldavid> Dan-K2VOL: I am, and want to thank all involved! please spread the word at your next meeting or whatever if it helps morale
[03:26] <stilldavid> I'm working on the ballast right now and found that page and its measurements to be helpful
[03:26] <Dan-K2VOL> Nice, I will.
[03:26] <Dan-K2VOL> Yes ballast requires a
[03:27] <Zuph> ballast requires a non iPad keyboard
[03:27] <Dan-K2VOL> Lot of trial and error that not everyone should have to repeat
[03:27] <Dan-K2VOL> Har har
[03:27] <stilldavid> LOL, nice :)
[03:27] <Dan-K2VOL> Zuph and I are coding at LVL1 here
[03:27] <stilldavid> agreed! I'm suddenly glad I got the same solenoid valve as y'all
[03:28] <stilldavid> related question: will you have a ballast level sensor?
[03:28] <Zuph> HEH
[03:28] Last message repeated 1 time(s).
[03:28] <Dan-K2VOL> No
[03:28] <stilldavid> I found a supplier sample of one of these: http://www.sparkfun.com/products/10221
[03:28] <Zuph> Funny question that
[03:28] <stilldavid> that's about 15" long
[03:29] <stilldavid> Zuph: go on...
[03:29] <Zuph> Well, this question actually has two facets
[03:29] <Zuph> We bought one of the sparkfun magnetopots to play around with
[03:29] <Zuph> but the guy doing our ballast was too lazy to actually use it.
[03:30] <Dan-K2VOL> Yeah we talked to their CEO, cool place, but... The etape sensor requires plastic envelope to compress
[03:30] <stilldavid> I'm not sure that the magnepots are all the great, from what jcoxon has said
[03:30] <Zuph> We also talked the eTape manufacturer into giving us free samples, but they aren't temp rated
[03:30] <stilldavid> ah, bummer. well, there goes that idea.
[03:30] <Dan-K2VOL> And they just won't at -40c, the guy said they'd tried in the cold far warmer than that
[03:31] <Dan-K2VOL> He suggested we could just run high current thru it, using it as a resistive heater.
[03:31] <stilldavid> well, on the plus side, the discharge from the ballast looks pretty consistent, at least in my basic testing
[03:31] <Dan-K2VOL> I suggested that would actually be a resistive igniter
[03:32] <stilldavid> I'm waiting for the pro's over at White Star to do some testing with alcohol in an ice chest, though :P
[03:32] <Zuph> hah
[03:32] <Zuph> Unfortunately, we haven't devised a method to test flow rate in the cold vs. flow rate in the warm
[03:32] <stilldavid> I'll need an address to send several cases of beer to when this is all over with...
[03:33] <Dan-K2VOL> Hehe gracias
[03:33] <Zuph> We've tested all the hardware in the cold, though, and the valves/tank/liquid all work
[03:33] <Zuph> Oh, one thing to note: if you don't actuate the ballast valve every once and a while in the cold, it will stick
[03:33] <Dan-K2VOL> The problem is weighing it live through a cold test
[03:33] <Zuph> If you tickle the valve once per hour for one second, it solves that problem
[03:34] <stilldavid> Zuph: duly noted, thanks for the heads up
[03:35] <Dan-K2VOL> You should check out our current ballast algorithm, it's about the most elegant formula I've ever come across in amateur ballooning
[03:35] <Dan-K2VOL> I just got word that it isn't on the wiki yet -P
[03:35] <Zuph> heh
[03:36] Action: stilldavid waits patiently
[03:36] <stilldavid> no pressure on anything, though, I'm still several months out from thinking of a launch
[03:36] <Zuph> heh
[03:37] <stilldavid> and I only have one envelope, so I want to use it wisely
[03:37] <Zuph> It's inspired by an algorithm used by a similar balloons in the 1940s
[03:37] <stilldavid> hm, now you have me curious :P
[03:37] <stilldavid> and I have been fretting over that part of things for a while.
[03:37] <stilldavid> I really have no idea where to start.
[03:38] <stilldavid> heh, so I'm in Boulder, CO just a few miles from NIST/NOAA offices. I think I might show up one afternoon and see if anyone wants to help with predictions, weather, etc...
[03:38] <Dan-K2VOL> Use the results from our flights to see how it works before you worry too much
[03:38] <Zuph> Basically, you set a target altitude: if you're above the altitude, your target vertical velocity is a small negative value (you try to sink slowly). If you're below the target, you set a small positive target (you try to rise slowly).
[03:39] <Zuph> If you're falling too fast, open the ballast valve
[03:40] <stilldavid> I've been thinking of having a variable target altitude; as in trying to determine where it floats dynamically
[03:40] <Dan-K2VOL> Good plan
[03:40] <stilldavid> eg: record peak altitude before plateu/descent and record that as a target
[03:40] <Zuph> While your valve is open, babysit it: Wait until you reach halfway between your current vertical speed and your target vertical speed, then close the valve for a minute.
[03:41] <Zuph> That minute allows inertia to "catch up"
[03:41] <Zuph> if you're still falling faster than you want, open the valve again.
[03:42] <Zuph> Actually, I have a short C program which will allow you to check out the algorithm on your desktop, if you'd like :)
[03:42] <Dan-K2VOL> For the flighgt profile, e.g. Target altitude, Read the paper referenced from our front page about early work on zero pressure balloons.
[03:42] <Dan-K2VOL> Its gold
[03:42] <stilldavid> Zuph: I'm all ears :) (eyes?)
[03:42] <Zuph> heh
[03:42] <stilldavid> Dan-K2VOL: will do
[03:42] <Zuph> It'll probably be confusing, since it's completely uncommented, but what's your email?
[03:43] <Dan-K2VOL> It's very conversational, and 8 pages, a good bedtime read. From 1947
[03:43] <Dan-K2VOL> My favorite part was how they'd lose track of them and use UFO reports to figure out where they went over NM and Colorado
[03:43] <stilldavid> me@stilldavid.com
[03:44] <Zuph> (Direct Link) http://ufos.homestead.com/balloons.pdf
[03:44] <stilldavid> awesome! conspiracy theorists, anyone?
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[03:46] <Dan-K2VOL> Hehe they mention reports of passing over Roswell among other towns
[03:50] <Zuph> As an aside, there are a whole lot of potentially interesting balloon files up in Boulder: https://nldr.library.ucar.edu/archon/?p=collections/findingaid&id=18&q=&rootcontentid=2602
[03:50] <Zuph> We'd just about give our left arms to sift through it.
[03:51] <stilldavid> is this publicly accessible?
[03:52] <stilldavid> if you give me a list of folders I can go photocopy them and/or other stuff I find interesting
[03:52] <Zuph> The page is kind of nebulous as to how publicly accessible things are.
[03:53] <Zuph> And there's 6 linear feet of stuff. We can only provide a basic idea of what might be interesting.
[03:53] <stilldavid> I'm sending an email through the "contact us"
[03:53] <stilldavid> well, it looks like stuff is in boxes/folders and somewhat organized
[03:55] <Zuph> yeah
[03:55] <stilldavid> are we ballooners or balloonists?
[03:56] <Zuph> heh
[03:56] <Zuph> I'm not sure :-p
[03:56] <Zuph> we'll have to sift through the list and see what would be most interesting
[03:56] <Zuph> That would be incredible, though
[03:57] <Zuph> I'm sure it's a treasure trove of nearly-lost information
[03:57] <stilldavid> well, I'd love to sift through in person, too.
[03:57] <stilldavid> and can take photos/photocopies/reproduce whatever looks fun
[03:58] <Zuph> That would be absolutely amazing
[03:58] <Zuph> We'd owe *you* a lot of beer :-p
[04:03] <stilldavid> email sent!
[04:03] <Zuph> Cool!
[04:08] <stilldavid> Zuph: this is really cool (ballast.c)
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[04:11] <Zuph> Thanks :)
[04:11] <stilldavid> oh, cool. I made an account on the NCAR site
[04:12] <stilldavid> and now I can make an appointment to view the records.
[04:12] <stilldavid> but it might be a couple weeks until I can get there. I've got to deal with this whole "free day" thing at work :-/
[04:12] <Zuph> heh
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[04:13] Nick change: Dan-K2VOL_ -> Dan-K2VOL
[04:13] <stilldavid> it's stressful. 150k is a lot of money and there will be a lot of people hacking on that code
[04:13] <Zuph> Planning for more servers melting?
[04:13] <stilldavid> don't know what to plan for, really.
[04:13] <stilldavid> but worst case, yes :)
[04:13] <Zuph> were you there for the last free day?
[04:14] <stilldavid> I think this year bandwidth will be the bottleneck
[04:14] <stilldavid> I was hired right after the last one; I think it was a wake-up call that they all needed more people
[04:14] <stilldavid> my interview was seriously a week or so after it
[04:15] <stilldavid> but I was certainly a customer hitting F5 with the rest of the world :)
[04:15] <Zuph> hehe
[04:16] <Zuph> White star will be F5ing with the best of 'em :-p
[04:16] <stilldavid> oh, on that note: I think we're going to make it so you can combine/share free day earnings
[04:16] <Zuph> Oh, cool :)
[04:17] <stilldavid> so if everyone at WS had an account and tried for the quiz... just sayin'
[04:17] <Zuph> We were already planning to do that :-p
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[04:17] <stilldavid> I'm really not sure how long it will go for, what the odds are like, anything. nobody is. but it'll be fun
[04:18] Action: SpeedEvil sighs.
[04:18] <Zuph> Aye aye
[04:18] <SpeedEvil> I got in at free day last year - but paypal dropped me 2/3 of the way through.
[04:18] <stilldavid> but I can say: study the bite-sized tutorials and know your electronics!
[04:18] <SpeedEvil> So no luck.
[04:18] <Zuph> SpeedEvil: :(
[04:18] <stilldavid> SpeedEvil: I never got past the shipping page
[04:18] <Zuph> At least the side decided to crash for me straight out.
[04:19] <stilldavid> well, we've got some beefy boxes doing the heavy lifting now
[04:19] <SpeedEvil> I was using - at the same time - paypal from US and UK IPs - so paypal put me to extra verification, and broke the order
[04:19] <stilldavid> 2x dell r900 with 16 cores/32G ram each
[04:19] <stilldavid> and 2x hardware load balancers
[04:20] <stilldavid> not to mention the beefed up DB server and slaves....
[04:20] <stilldavid> but yes, it's going to be a stressful 7 days for IT at SF
[04:20] <Zuph> Just trust the *cloud* man :-p
[04:20] <SpeedEvil> I was wondering last year why you bothered with a db server
[04:20] <stilldavid> Zuph: oh, not you too :P
[04:20] <SpeedEvil> not simply go with a completely static site
[04:20] <Zuph> Heh
[04:20] <stilldavid> SpeedEvil: very good question
[04:20] <stilldavid> this year we don't have a choice
[04:20] <Zuph> White Star is preparing for a potential slashdottting, and the only way we would be able to afford it is with AWS
[04:20] <SpeedEvil> Ah.
[04:21] <stilldavid> but I have hand-written all the SQL statements for the quiz
[04:21] <SpeedEvil> Zuph: Or flex down to a 1K text page. :)
[04:21] <Dan-K2VOL> Snox
[04:21] <stilldavid> and all the product pages and everything else that can be is memcached
[04:21] <SpeedEvil> Sounds fun.
[04:21] <stilldavid> Zuph: is that a wordpress site?
[04:21] <Dan-K2VOL> Went down hard every time word got out and ppl started refreshing the pretty tracking page
[04:22] Nick change: TraumaKitteh -> TraumaPony
[04:22] <Zuph> stilldavid: We honestly expect our wordpress to go down. The tracking page will hopefully stay up, though.
[04:22] <stilldavid> WP SuperCache works wonders
[04:22] <Zuph> SpeedEvil: We're using JavaScript for everything this time. After the initial page load for tracking, the it's mere bytes per telemetry update per client.
[04:22] <SpeedEvil> Zuph: makes sense
[04:22] <Zuph> And all the JavaScript bits are hosted at google :-p
[04:23] <Dan-K2VOL> We should put a big DO NOT RELOAD THE PAGE warning
[04:23] <stilldavid> won't help, users are dumb :P
[04:24] <Zuph> Dan-K2VOL: With any luck, browser caching will help on that end
[04:24] <Zuph> :-p
[04:24] <stilldavid> also: apache page speed
[04:24] <Dan-K2VOL> Haha wonder if you could penalize each reloader with some sort of visible delay for reloading that gets longer each reload :-P
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[04:24] <Zuph> Using nginx as a web server.
[04:25] <stilldavid> ah, well even better I guess
[04:25] <Zuph> Here's hoping, anyway
[04:25] <Zuph> I'm just an armchair web dev. I have no idea how to do realistic load testing.
[04:26] <stilldavid> Zuph: we use the cloud!
[04:26] <Zuph> heh
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[04:46] <stilldavid> alright, I'm off. g'nite all, and I'll keep you posed on NCAR
[04:47] <Zuph> awesome, talk to you later
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[09:11] <Upu> morning
[09:18] <fsphil> hi hi
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[09:28] <Upu> does anyone have that picture of Rob Harrisons pyro cut down design ?
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[09:34] <Upu> http://www.flickr.com/photos/30721501@N05/sets/72157619368022480/
[09:34] <Upu> foudn it
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[10:06] <Laurenceb_> http://i.imgur.com/fBa4m.jpg
[10:06] <Laurenceb_> fun with panaramas
[10:13] <fsphil> yikes, the caa are getting even quicker. notam received for this weekend :)
[10:14] <Upu> you launching ?
[10:14] <Upu> nice pic Laurenceb
[10:15] <fsphil> looking likely Upu, unless it snows again
[10:16] <fsphil> predictions still show very strong winds, landing in england
[10:16] <fsphil> http://habhub.org/predict/#!/uuid=d056f389639ec36861012f2fde699be44a745adc
[10:17] <fsphil> bit near the lake district
[10:17] <fsphil> if it landed in there I'd never see it again
[10:17] <Upu> don't know
[10:19] <Upu> that someones house if you zoom in :)
[10:20] <fsphil> haha
[10:21] <fsphil> it's a shame google maps doesn't have residential phone numbers on there
[10:22] <fsphil> a slower ascent puts it near middlesbrough
[10:22] <fsphil> http://habhub.org/predict/#!/uuid=0051143bf6c2529868600499d5cb8f2f844ec28b
[10:23] <Upu> http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=54.3796++-2.6611&sll=51.506721,-0.088571&sspn=0.009122,0.01811&g=Lon:+-2.6611&ie=UTF8&ll=54.376962,-2.661323&spn=0,0.009055&t=h&z=17&layer=c&cbll=54.376962,-2.661323&panoid=J_igoNaxI-QOl8MbctBN7g&cbp=12,9.26,,0,2.24
[10:23] <Upu> looks nice
[10:23] <Upu> no don't land in Middlesbrough you'll never see it again the natives will steal it
[10:23] <Upu> also ICI Wilton is a no fly zone
[10:24] <Upu> Ever seen the start of Blade Runner ? With the flame stacks ? Thats ICI Wilton
[10:24] <fsphil> eek
[10:25] <Upu> http://maps.google.com/maps?source=s_q&hl=en&geocode=&q=ICI+Wilton&sll=54.376962,-2.661323&sspn=0.004293,0.009055&ie=UTF8&hq=ICI+Wilton&radius=15000.000000&split=1&hnear=&ll=54.585095,-1.116915&spn=0.032728,0.072441&t=h&z=14
[10:25] <Upu> Petro-chemical wonderland
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[10:26] <fsphil> wow, it really is bladerunner like
[10:26] <Upu> can you get it to Skipton ?
[10:27] <Upu> too far down :)
[10:27] <Upu> not going to wait until winds are ok ?
[10:27] <fsphil> the prediction will likely change, it might move towards you
[10:27] <Upu> ok lets see I'm free all day tommorrow but have opticians @ 10am
[10:27] <fsphil> nah, this is my third notam - not wasting it :)
[10:28] <Upu> so after that I'm all yours
[10:28] <Upu> Saturday yeah ?
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[10:28] <fsphil> sunday
[10:28] Nick change: GW8RAK_ -> GW8RAK
[10:28] <Upu> ok even better
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[10:28] <fsphil> I made a mistake on the notam application, so it begins on sunday instead of saturday
[10:28] <Upu> lets see how the predictions go
[10:29] <Upu> I'm even considering driving to the Lakes to get it
[10:29] <fsphil> yea, they'll be fairly accurate by tomorrow evening
[10:29] Nick change: shenki_ -> shenki
[10:29] <fsphil> the only big variable is the burst altitude
[10:30] <Upu> btw http://s0.geograph.org.uk/photos/11/19/111909_8e8b03c9.jpg ICI Wilton at night
[10:30] <Upu> lol
[10:31] <fsphil> a nice friendly place to land ;)
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[10:45] <Upu> what sized balloon ?
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[10:45] Action: Laurenceb_ has got the IR modules from foodlamps.co.uk
[10:46] <Laurenceb_> very nice stuff - unfortunately theres some exposed metal contacts on the side that will be live in use :S
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[10:48] <fsphil> Upu: 1000g
[10:57] <Upu> ok cool well lets check back tommorrow and see where it's going
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[11:52] Action: Laurenceb_ has found a way to tune 434mhz ants
[11:52] <Laurenceb_> put the tx in a microwave
[12:00] <Laurenceb_> annyoingly its still maxing out
[12:03] <fsphil> how about the neighbours microwave
[12:03] <Laurenceb_> i seem to have got the zl-special tuned, but its hard to tell - even 6m away with no antenni on the tx and sticking it inside a microwave im still completely saturating
[12:04] <Laurenceb_> just left the tuning cap in the center of the region where it saturates
[12:05] <Laurenceb_> its amazing how sensitive it is - a few pF more or less capacitance and theres no signal at all
[12:05] <fsphil> what about a 50ohm resistor between tx and rf-gnd?
[12:05] <Laurenceb_> cant see it giving any less radiation
[12:06] <Laurenceb_> atm ive left the connector with nothing on - its an sma header on a ntx2 carrier board
[12:06] <Laurenceb_> microstrip line for the Rf
[12:06] <Laurenceb_> so its all sheilded
[12:07] <Laurenceb_> ntx2 dont mind being run with no antenni
[12:07] <fsphil> yea noticed that
[12:08] <Laurenceb_> very close to being outside the range of my trimcap
[12:09] <Laurenceb_> i swapped the 30pF one for a 22pF that could be adjusted through a small hole drilled through the casing
[12:09] <Laurenceb_> looks like something between 18 and 20pF is needed
[12:10] <Laurenceb_> active antenni supply circuit seems to work ok as well XD
[12:10] <Laurenceb_> need to take it all to a launch now
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[13:01] <SpeedEvil> microwaves have moderately poor shielding at ~2.4G
[13:01] <SpeedEvil> quarter wave choke and all that
[13:06] <Laurenceb_> i thought they ran at 2.4G
[13:06] <SpeedEvil> err
[13:07] <SpeedEvil> I was looking at my keyboard.
[13:07] <SpeedEvil> That should read !2.4G
[13:07] <Laurenceb_> ah
[13:07] <Laurenceb_> it seems to be pretty strong
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[13:08] <Laurenceb_> biscuit tin might be worth a shot if i can find one the right size
[13:09] <SpeedEvil> corned beef can?
[13:09] <SpeedEvil> you can open them, and then push the top down on the bottom and it fits nicely due to the slope
[13:09] <SpeedEvil> then solder
[13:09] <Laurenceb_> interesting
[13:10] <Laurenceb_> dont have any tho
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[14:03] <fsphil> ah crap it's snowing a bit
[14:04] <jonsowman> oh dear
[14:04] <jonsowman> saw your list email fsphil, hope the weather is alright this time
[14:04] <jonsowman> :)
[14:04] <jonsowman> got a prediction link?
[14:06] <Upu> o7 recovery team ready to roll :)
[14:07] <Upu> http://habhub.org/predict/#!/uuid=d056f389639ec36861012f2fde699be44a745adc
[14:09] <fsphil> hiys jonsowman, yea I don't expect as much snow this time - hope not anyway
[14:11] <Upu> I just found a nice app for my iPhone to do GPS range finding with no internet connectivity
[14:11] <fsphil> nice
[14:12] <fsphil> I seen an ipad today, our boss got one. lovely screen, but too big and heavy.
[14:18] <fsphil> 3.5m/s seems the ideal ascent rate
[14:22] <jonsowman> looks like a decent path
[14:22] <fsphil> lots of water :)
[14:22] <fsphil> forecast is for a sunny but cold day
[14:23] <jonsowman> as long as it's not too windy at ground level you'll be alright then
[14:23] <fsphil> 17mph.. hmm
[14:24] <jonsowman> have you got anywhere a bit sheltered you can fill it?
[14:24] <Elwell> trying to build dl-fldigi -- does http://elwell.pastebin.com/FFNnWkjS look OK?
[14:24] <Elwell> hmm no hamlib
[14:24] <fsphil> nope.. I might have to setup a tent
[14:24] <jonsowman> filling in wind is horribly tricky, especially if you're aiming for an accurate fill for a accurate ascent rate
[14:25] <fsphil> Elwell: you'll probably want portaudio and sndfile too
[14:25] <Elwell> yeah - its been a case of ./configure , fail, yum install foo-devel
[14:26] <Elwell> lather, rinse and repeat
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[14:36] <fsphil> Elwell: fedora? I've a list of dependencies somewhere
[14:36] <Elwell> fsphil: yeah 's OK - seems to have built OK
[14:36] <fsphil> np
[14:37] <fsphil> it's at the bottom of this page anyway: https://github.com/fsphil/dl-fldigi/wiki
[14:38] <Elwell> if you folks do midweek launches I have more chance of tracking (don't have a rig at home. yet...)
[14:39] <fsphil> it happens, occasionally
[14:40] <Elwell> yeah, but I've gotta unbugger the rotor on the shack at work anyway, so there's no rush :-)
[14:41] <jonsowman> many more CUSF midweek launches (and launches generally) towards the end of this year, once I have a car :)
[14:42] <Elwell> ok - be v interested to see if I can pick that up as far south as here.
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[14:50] <fsphil> if your horizon is clear you should be fine
[14:54] <jonsowman> Elwell: whereabouts are you?
[14:56] <Upu> great snow forcast here
[14:56] <Upu> and unfortunately my car is in the garage and I have this 2WD thing
[14:57] <Elwell> jonsowman: Geneva (so slight problem with the Jura being in the way for north facing reception)
[14:57] <jonsowman> ah okay
[14:58] <jonsowman> well there is still some chance you'll hear CUSF launches
[14:58] <Elwell> yeah, 's pushing it _slightly_ :-)
[14:58] <jonsowman> especially as they usually head east from the launch site
[14:59] <Upu> Launches from CUSF at the weekend too ?
[15:00] <jonsowman> whenever suits really, weekend ones are likely
[15:00] <jonsowman> since we have the whole day to launch, chase & recover
[15:01] <fsphil> ah, geneva is a bit far ;-)
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[15:01] <fsphil> actually would have been a good spot had the last floater actually floated
[15:02] <jonsowman> indeed
[15:02] <jonsowman> another soon though hopefully :)
[15:02] <fsphil> Upu: when's the snow arriving?
[15:02] <jonsowman> wonder where james has got to with that
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[15:02] <Upu> http://metcheck.com/V40/UK/FREE/today.asp?zipcode=hx3
[15:02] <Upu> sleet hopefully
[15:02] <Upu> http://metcheck.com/V40/UK/FREE/today.asp?zipcode=kendal
[15:03] <Upu> thats your target
[15:03] <Upu> http://www.w0eea.com/newrov.jpg haha love it
[15:03] <Upu> I need roof mounting for my Yagi that I can rotate using some sort of stepper
[15:04] <fsphil> wow, that beats the projecthorus guys' car
[15:05] <Upu> are there any off the shelf units ?
[15:12] <fsphil> you could modify a satellite dish motor mount
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[15:37] <Laurenceb_> i was looking at beefy servos
[15:37] <Laurenceb_> but they arent powerful enough
[15:37] <SpeedEvil1> for?
[15:37] Nick change: SpeedEvil1 -> SpeedEvil
[15:39] <Laurenceb_> pointing antenna
[15:40] <Laurenceb_> http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=2084432
[15:40] <Laurenceb_> pneumatics isnt that expensive, even from RS
[15:41] <SpeedEvil> ah
[15:41] <SpeedEvil> surely they are if you have htem at the middle
[15:41] <SpeedEvil> or do you want to do az/el
[15:42] <Laurenceb_> then it interferes
[15:42] <Laurenceb_> maybe no i guess - with clever use of fibreglass poles
[15:42] <SpeedEvil> not if you have it on a bamboo pole to the balance point, with a bearing
[15:42] <SpeedEvil> but you only get az that way
[15:43] <SpeedEvil> With a bearing, and a clutch, or link, in case birds land on it.
[15:43] <Laurenceb_> have the bottom of the pole attach to tripod
[15:43] <Laurenceb_> then stick another bearing and servo in there
[15:43] <SpeedEvil> yeah
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[15:46] <Laurenceb_> once you get the valves and everything else for pneuatic is hideously expensive
[15:49] <SpeedEvil> get USB missile launcher, 2 car windscreen wiper motors, h-bridge and a beefy 12V supply.
[15:52] <Laurenceb_> lsm303dlh mounted in the antenna somewhere would be interesting
[15:53] <SpeedEvil> yep
[15:54] <SpeedEvil> Make it wireless, add a teeny reaction wheel, a swivel, and you can just hang it on a string.
[15:54] <SpeedEvil> Also that means you can hang it on a balloon.
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[15:57] <Laurenceb_> lmao
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[16:27] <stilldavid> Dan-K2VOL, the archivist got back in touch with me and we have a date for sometime the week of the 17th
[16:29] <jonsowman> oi zeusbot
[16:30] <jonsowman> >.>
[16:34] <stilldavid> :(
[16:41] <SpeedEvil> http://www.b3tards.com/u/d81a83cf6d5a93144ba7/caaaaaaaans600.jpg
[16:42] <stilldavid> priceless
[16:44] <fsphil> lol
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[17:10] <stilldavid> w00t! set to browse the archives on Wed. the 19th!
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[17:13] <Zuph> stilldavid: Awesome!
[17:13] <stilldavid> I can take pictures for "personal use"
[17:14] <stilldavid> so if you find anything that piques your interest, let me know and I'll be sure to grab it
[17:14] <Zuph> We'll peruse through the listing to see if anything looks particularly interesting from our end.
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[17:18] Topic changed on #highaltitude by ChanServ!ChanServ@services.: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk - Launch: HADIE 2, 11:00 GMT Sunday 9th Jan, N.Ire
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[17:54] <MrCraig> Parachutes and radios arrived :-)
[17:55] <stilldavid> MrCraig, Nice! what 'chute did you get?
[17:55] <MrCraig> I found a couple of military surplus 1.5meter UAV chutes online so snapped them up
[17:56] <MrCraig> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=230564585152&ssPageName=STRK:MEWAX:IT
[17:57] <stilldavid> ah, very cool
[17:58] <MrCraig> yeah, great fun to play with hehe - should have seen the looks I got from staff at the office when they arrived and I unboxed them
[18:00] <stilldavid> hah, same way when I got the ZP envelope
[18:00] <stilldavid> some classic wtf looks
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[18:00] <stilldavid> I hope you ran up to the roof and started throwing them off right away
[18:01] <MrCraig> lol I wanted to but was at work - no fear though, the weekend is a day away and I live in flats.
[18:02] <MrCraig> I got lots of sugestions to test them off the fire escape but they wanted me to take the flight and I weigh a little more than these little chutes can carry.
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[18:07] <jcoxon> evening all
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[18:07] <SpeedEvil> evening
[18:08] <MrCraig> evening
[18:08] Action: SpeedEvil is having an odding.
[18:08] <jcoxon> hooray for a launch
[18:11] <jcoxon> ping jonsowman
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[18:15] <jcoxon> did rob launch today?
[18:15] <jcoxon> some flight data appeared on the server
[18:16] <jonsowman> hi jcoxon
[18:16] <jonsowman> how's things
[18:17] <jcoxon> jonsowman, good thanks - noticed in the logs you were asking about a floater flight
[18:17] <jcoxon> will be ready by teh end of this weekend
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[18:19] <jonsowman> nice one :D
[18:19] <jonsowman> looking forward to that
[18:20] <jcoxon> is the notam in place?
[18:20] <jcoxon> as i've got annual leave from 14/1 to 18/1
[18:20] <jonsowman> yep, we're covered until middle of may when the current one runs out
[18:21] <jcoxon> fancy a floater launch?
[18:21] <jonsowman> of course :D
[18:21] <jonsowman> I'm not back in cam until 16/1, but Randomskk is back earlier
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[18:22] <jcoxon> i think eroomde should be around as well
[18:22] <jonsowman> I will be there if I'm in cam by the time you launch :)
[18:22] <jonsowman> excellent, haven't seen him for a long time
[18:22] <jcoxon> well i was thinking we could also try out hte super-pressure as well
[18:22] Action: Randomskk is back saturday
[18:22] <jonsowman> launch both at the same time?
[18:22] <jcoxon> could do...
[18:23] <jcoxon> would need a super-pressure payload
[18:23] <jcoxon> but that wouldn't take long
[18:23] <jonsowman> i.e. super-light?
[18:23] <jcoxon> fsa03 + seeeduino film + ntx2
[18:23] <jonsowman> cool
[18:24] <jcoxon> reckon i can get it < 80g
[18:24] <jcoxon> and with some proper He we can get it floating off 1 foil balloon
[18:24] <jonsowman> that'd be good
[18:24] <jonsowman> you got two NTX2 on different freqs?
[18:24] <jcoxon> might be worth launching the super-pressure first - say in the morning
[18:25] <jcoxon> then atlas before sunset
[18:25] <jonsowman> speaking of NTX2s, Randomskk - heard anything about the cusf order?
[18:25] <jonsowman> jcoxon: yeah, makes sense
[18:25] <Randomskk> I haven't, no
[18:25] <jonsowman> will email Dan
[18:25] <jcoxon> jonsowman, only have .075
[18:25] <jonsowman> I meant to do some ferret hard/software over the holidays
[18:25] <jonsowman> pff
[18:25] <jonsowman> jcoxon: righto
[18:26] <Randomskk> you're not the only one
[18:26] <Randomskk> man, the things I meant to do over the holidays...
[18:26] <jonsowman> always happens
[18:26] <Randomskk> seriously
[18:26] <Randomskk> okay deloying some code to live, brb
[18:26] <jonsowman> hehe ok
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[18:28] <jcoxon> check this out: http://de8msh.blogspot.com/
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[18:32] <fsphil> like the screen
[18:32] <jcoxon> on a balloon... for uplink
[18:33] <jonsowman> neat
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[19:27] <Laurenceb_> me has been assembling IR reflow oven
[19:28] <Laurenceb_> needs big enclosure box form farnell still
[19:30] <Laurenceb_> the module thingys from fodlamps seem to be stainless steel so thats good
[19:31] <SpeedEvil> neat.
[19:31] <SpeedEvil> I just got my new linux boxes.
[19:32] <SpeedEvil> http://www.amazon.co.uk/Parrot-DF3120-Wireless-Digital-Photo/dp/B0018A55B0/ref=sr_1_1?ie=UTF8&m=A3CV872FYAAA4E&qid=1293509900&sr=1-1
[19:32] <SpeedEvil> They are unfortunately selling below cost - so this'll run out It's old QVC stock.
[19:33] <Laurenceb_> interesting
[19:33] <Laurenceb_> does it have serial?
[19:33] <SpeedEvil> BT serial
[19:33] <Laurenceb_> ah
[19:33] <SpeedEvil> You can upload photos directly to it from phones
[19:34] <Laurenceb_> i see
[19:34] <Laurenceb_> http://www.food-lamps.co.uk/products/full-assemblies-reflector-holder-bulb/full-assembly-300w-jacketed-quartz-bulb.html
[19:34] <SpeedEvil> https://sites.google.com/site/repurposelinux/df3120
[19:34] <Laurenceb_> thats what im using
[19:34] <SpeedEvil> And you can upgrade it to 64M
[19:34] <SpeedEvil> RAM
[19:34] <SpeedEvil> neat
[19:35] <SpeedEvil> you got two?
[19:36] <Laurenceb_> yes, one top one bottom
[19:36] <Laurenceb_> im a little owrried about uneaven heating
[19:37] <Laurenceb_> ive managed to add wont M4 bolts to mount the bulb about 1cm lower than designed
[19:37] <Laurenceb_> s/wont/two
[19:37] <SpeedEvil> to aberrate the beam?
[19:37] <Laurenceb_> hopefully that will give a getter radiation pattern - it can be adjust up down now as well
[19:37] <Laurenceb_> yes
[19:38] <Laurenceb_> looks like theres a lot of work gone into the parrot thingy
[19:38] <SpeedEvil> yeah
[19:38] <SpeedEvil> In a way it's awesome, in a way it's annoying that it reduces the market for small vendors of friendly stuff
[19:39] <Laurenceb_> i guess
[19:39] <SpeedEvil> I'm planning on hooking up BT GPS, and BT ODBII into a car info dipsplay, including fuel burn
[19:39] <Laurenceb_> nice - does it have hardware serial?
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[19:41] <Laurenceb_> ah i see - one usable
[19:42] <Laurenceb_> ive found spash guard things of pans are a cheap source of stainless mesh
[19:42] <Laurenceb_> *for
[19:42] <Laurenceb_> - to support the pcb
[19:42] <SpeedEvil> Aren't they Al?
[19:42] <SpeedEvil> My two are.
[19:42] <SpeedEvil> MAybe there are SS ones too though
[19:43] <Laurenceb_> hmm that would be annoying
[19:43] <Laurenceb_> didnt think of that one
[19:43] <SpeedEvil> Mine is Al, with lots of little holes
[19:43] <SpeedEvil> not a SS mesh
[19:43] <Laurenceb_> as cooking stuff is usually stainless
[19:44] <SpeedEvil> yeah
[19:44] <Laurenceb_> well it looks like some sort of expanded metal as its called
[19:44] Action: SpeedEvil checks.
[19:44] <Laurenceb_> the cheaper ones were tin plated steel
[19:44] <Laurenceb_> as there was some corrosion
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[19:50] <Laurenceb_> guess i could return it - havent cut out the mesh yet
[19:52] <Laurenceb_> does the parrot thing have a power supply?
[19:53] <SpeedEvil> Actually.
[19:53] <SpeedEvil> Mine looks too 'white' to be SS
[19:53] <SpeedEvil> but - it's too rigid to be Al
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[19:53] <SpeedEvil> It might be SS
[19:53] <Lunar_Lander> hello
[19:53] <SpeedEvil> oh
[19:54] <Laurenceb_> burn it?
[19:54] <Lunar_Lander> what's up?
[19:55] <SpeedEvil> IT's not noticably magnetic - so not plated steel
[19:56] <SpeedEvil> It must just be SS, though I don't understand the colour
[19:56] <Laurenceb_> yeah, when i looked in the local hardware store only the really cheap ones wher eplated
[19:56] <Laurenceb_> poor surface polishing?
[19:56] <SpeedEvil> maybe
[19:56] <Lunar_Lander> what's up?
[19:56] <Lunar_Lander> do you have unidentified material?
[19:56] <Laurenceb_> only 5 parrot thingys left :/
[19:56] <SpeedEvil> We are debating the composition of frying-pan splash-guards
[19:57] <Lunar_Lander> ah#
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[19:57] <Laurenceb_> for use in diy IR reflow ovens
[19:57] <Laurenceb_> id better buy a couple of parrot photo frames if they can run on batteries
[19:57] <SpeedEvil> Laurenceb: there is the - near identical http://www.amazon.co.uk/Parrot-DF7220-7-inch-Digital-Photo/dp/B000ZRRXWQ/ref=sr_1_4?ie=UTF8&m=A3CV872FYAAA4E&s=generic&qid=1292181391&sr=1-4 too
[19:58] <Laurenceb_> thats way more
[19:58] <Laurenceb_> what power does it take?
[19:58] <SpeedEvil> 5V@1A
[19:58] <SpeedEvil> And I haven't measured it
[19:59] <SpeedEvil> yeah - way more - but 7" screen
[19:59] <SpeedEvil> other hardware identical
[19:59] <Laurenceb_> if it says that on the supply it should be much less
[19:59] <SpeedEvil> sure - it's printed on the side of the box
[19:59] <Laurenceb_> well in most cases it is
[19:59] <Laurenceb_> ah ok
[19:59] <Laurenceb_> does it get hot/warm?
[19:59] <SpeedEvil> It runs off USB too - so 500mA at most I imagine
[19:59] <SpeedEvil> naah
[19:59] <Laurenceb_> the processor?
[19:59] <SpeedEvil> and the screen is variable brightness
[20:00] <SpeedEvil> so ...
[20:00] <Laurenceb_> wondering if itll run off lipos
[20:01] <Lunar_Lander> the 42th anniversary of the Hixon Rail Crash
[20:01] <Lunar_Lander> is today
[20:02] <SpeedEvil> https://sites.google.com/site/repurposelinux/df3120 - has scans
[20:03] <SpeedEvil> 'two cheap buck regulators' - implying probably yes
[20:06] Nick change: sumeet_ -> shipit
[20:07] <Laurenceb_> looks like its probably just a buck circuit
[20:07] <Laurenceb_> that thing can do buck or boost but nothing more clever
[20:07] <Laurenceb_> so presumably needs >3.3V
[20:08] <Laurenceb_> any chance you could check the current draw?
[20:12] <Elwell> re parrot thing -- saw some chat on the bifferboard list about it. Have you got one?
[20:13] <SpeedEvil> I have one - I have not played with it significantly.
[20:13] <SpeedEvil> It's remaindered stock, so ...
[20:13] <Laurenceb_> can you jam a multimeter inline with the supply?
[20:14] <SpeedEvil> Sorry - I'm not feeling up to anything more tonight than going to sleep.
[20:14] <SpeedEvil> The processor is the same one in my phone. I'd be astonished if it wanted more than ~200mA@3.3V for the basic CPU
[20:15] <SpeedEvil> And idle should be ~50mA - but suspend can be screwed up - and probably is.
[20:15] <SpeedEvil> (lack of required power sequencing)
[20:15] <Laurenceb_> i see
[20:15] <Laurenceb_> thanks
[20:16] <SpeedEvil> Night all. Though I may wake up again later.
[20:16] <Laurenceb_> cya
[20:21] <Laurenceb_> ordered 2 XD
[20:25] <Laurenceb_> might try using it as a uav platform
[20:25] <Laurenceb_> stic an avr on the serial
[20:26] <Laurenceb_> arm9 floating point perofrmance is a bit dire with linux aiui
[20:27] <Laurenceb_> guess itd be useful as a quick inferface for stuff
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[20:30] Action: Laurenceb_ wonders if dl-fldigi would run on it
[20:30] <MrCraig> quick question for the electronically astute :) I have my pic putting out a simple half second pulse for flashing an LED - feeding that into the ntx2 data line (via resistor at 10k) - I know it's not data but that should be transmitting something audiable right?
[20:30] <Laurenceb_> probably not enough ram.. maybe if upgraded to 64MB
[20:31] <GW8RAK> Yes, it should produce a shift in frequency of the NTX2 which can be detected.
[20:32] <GW8RAK> But the NTX2 can produce a big shift in frequency between the two input states, so it may be some way away from the nominal frequency.
[20:34] <MrCraig> thanks. I suspect that the resistors are too high because I'm also using 10k for the ntx2 supply - but I'll check up and down the frequency range some before trying to supply more voltage.
[20:34] <GW8RAK> My first attempt at modulation produced about 4.5KHz of shift.
[20:34] <MrCraig> that's pretty big!
[20:36] <GW8RAK> All I could see on fldigi was a lot of noise about every 100Hz. Couldn't understand it until I tuned up and down the band
[20:37] <MrCraig> tbh I may not be operating the radio correctly too - I'm totally new at this stuff :-/
[20:37] <GW8RAK> The NTX2 produces about 1.9KHz per volt
[20:38] <MrCraig> I should be dialing on LSB?
[20:38] <GW8RAK> I don't think it makes any difference. LSB or USB will work, but one will invert the 1's and 0's
[20:39] <GW8RAK> But USB is the "standard"
[20:39] <GW8RAK> Which radio have you got?
[20:39] <MrCraig> the Yaesu FT-790R
[20:40] <GW8RAK> Okay. If you are applying full supply voltage to the NTX2, the shift at 3.3V could be around 6KHz.
[20:40] <GW8RAK> Which is outside the passband of the 790 filter
[20:42] <MrCraig> I think the problem is the supply, I'm supplying less than a volt *doh*
[20:42] <GW8RAK> To the NTX2?
[20:43] <MrCraig> yeah
[20:43] <MrCraig> the pic was at 5
[20:44] <GW8RAK> The minimum for the NTX2 is 2.9V
[20:44] <GW8RAK> Max 15V
[20:47] <MrCraig> upped it to 5 and I'm hearing something :)
[20:47] <GW8RAK> Sounds promising
[20:47] <GW8RAK> You'll probably find there's a lot of "doh" moments when playing with radios and chips.
[20:48] <MrCraig> I'm certain for me more than most :)
[20:49] <MrCraig> ty GW8RAK - next experiment is going to be transmitting data - before trying to figure out digi to recieve it
[20:50] <GW8RAK> You'll probably find that transmitting data is the easy bit. It's producing the data to transmit and how to receive it which is the tricky bit!
[20:51] <MrCraig> yeah - for day one though, I'm going to hard-code an ascii string and probably repeat it through the chip's uart
[20:51] <MrCraig> some day next week I should get the connectors for the gps recievers - then the real fun begins
[20:52] <GW8RAK> If you are anything like me, you'll send that text string until you are sick of it and you start to decode the noise in your head!
[20:53] <MrCraig> lol - off of the sillyscope perhaps
[20:54] <MrCraig> now - the real *doh* moment. it's amost 9pm and thus far I've forgotten that generally humans should eat.
[20:54] <fsphil> braaains
[20:54] <GW8RAK> It's a well known fact that there is no need to eat when you are engrossed in a hobby.
[20:54] <GW8RAK> Nor sleep.
[20:54] <MrCraig> I'd like to lol that fsphil but it's also marginally scarey.
[20:55] <MrCraig> I could stand to shed a lb or two
[20:55] <fsphil> same here, too much chocs at christmas :)
[20:55] <Lunar_Lander> yeah same here too :D
[20:55] <MrCraig> oh I ate too much food since about october last year and pretty much carried on through two christmases.
[20:56] <Lunar_Lander> you mean october 2009?
[20:56] <MrCraig> actually 2008
[20:56] <GW8RAK> That's a lot o chocs
[20:56] <Lunar_Lander> ah ok
[20:56] <GW8RAK> of chocs
[20:56] <MrCraig> change in job, location, habits and diet - keep meaning to correct some of that.
[20:57] <SpeedEvil> For every 1.4Kg you lose, buy 1m^3 of helium
[20:58] <MrCraig> hmm, if I attach the balloons to myself I can combat 1.4kg for every 1m^3 of helium I buy... winner!
[20:59] <Laurenceb_> quick google search finds demo board schematic for that ARM9 soc
[20:59] <Laurenceb_> also 200ma @1.2V
[20:59] <MrCraig> right now though I'm going to call it a night, go get some groceries from the 24-hour. Thanks for the helps :-) night night!
[20:59] <GW8RAK> ttfn
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[21:01] <Laurenceb_> wonder if theres any driver for the I2C
[21:03] <Laurenceb_> http://www.mjmwired.net/kernel/Documentation/arm/Samsung-S3C24XX/S3C2412.txt
[21:03] <Laurenceb_> epic
[21:09] <GW8RAK> Laurenceb_ Have you managed to get the ZL special working?
[21:09] <Laurenceb_> yup
[21:09] <Laurenceb_> tested it with ntx2 in a microwave oven
[21:09] <GW8RAK> Great. That's original
[21:09] <Laurenceb_> looks like it needs ~20pf capacitance
[21:10] <GW8RAK> You added a discrete capacitor?
[21:10] <Laurenceb_> which is close to the limit of my cap - it does 2 to 22pf
[21:10] <GW8RAK> If that is all it needs, I'll get one ordered sometime.
[21:10] <Laurenceb_> i might add a 10pf cap in there so i can be more sure of the tuning
[21:10] <Laurenceb_> its very sensitive to the tuning
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[21:11] <Laurenceb_> - i swapped the one if shipped with for something i could adjust through a hole drilled in the casing - so its more weather tight
[21:11] <Laurenceb_> *it
[21:12] <GW8RAK> Having spent much of the holiday tuning things, I know how sensitive some things are.
[21:12] <Laurenceb_> the lna seems to be working ok as well
[21:12] <Laurenceb_> might add a lable on the top warning not to try using it for Tx :P
[21:13] <GW8RAK> But after spending a lot of time on a repeater, it now seems to be ultra sensitive. I can get into it from even very poor locations.
[21:13] <GW8RAK> TX'ing will it dead
[21:13] <Laurenceb_> ill take some shots for the wiki page, but my camera is flat atm
[21:13] <GW8RAK> I'm not taking a chance and am fitting a pair of relays so it can be switched in and out, or via an amp.
[21:14] <Laurenceb_> you have a ant with built in lna?
[21:15] <GW8RAK> I was going to try to fit it in a 70cms amp I have, but there's no simple path to build it into.
[21:15] <Laurenceb_> i see - i have a mmic thingy for rfmd
[21:15] <GW8RAK> Have only fitted the preamp to the colinear so far.
[21:15] <Laurenceb_> *from
[21:15] <SpeedEvil> Laurenceb: 'The CPU is BGA, but they have very conveniently used micro-via under each pad, so all the pins are prodable from the bottom side of the board.'
[21:15] <Laurenceb_> i know XD
[21:16] <Laurenceb_> looks like i2c could be made to work if the pins are there - ill look on the demo board pinout
[21:16] <GW8RAK> I want to fit it close to the aerial as putting it in the shack adds a lot of signal strength, but almost as much noise.
[21:16] <Laurenceb_> SpeedEvil: wonder if one of those buck regs is 1.2V
[21:16] <GW8RAK> Nearer the aerial, it should provide more signal without noise
[21:17] <Laurenceb_> GW*RAK: mine is inside the aerial
[21:17] <Laurenceb_> real pita to assemble
[21:17] <GW8RAK> I remember you saying. When I get the final beam for 70cm's, I'll put the preamp and the tx amp at the masthead
[21:18] <GW8RAK> But other projects are keeping me busy at present.
[21:19] <Laurenceb_> i had to splice the rg58m onto some rg178 to get enough flexibility
[21:19] <GW8RAK> I want to build a very low level RF power meter and a DDS module which should give me a basic spectrum analyser for tuning filters
[21:20] <Laurenceb_> neat
[21:20] <GW8RAK> I can see that controlling the DDS from a Picaxe could be quite a problem.
[21:20] <Laurenceb_> heh
[21:21] <Laurenceb_> AD make some nice stuff
[21:21] <Laurenceb_> i want to try DDS + upconvertor
[21:21] <GW8RAK> This is the AMQRP DDS60 module.
[21:21] <Laurenceb_> then id have something decent to pick up with my sdr
[21:22] <Laurenceb_> oh that board is really awesome
[21:22] <fsphil> nice board, got one but haven't played with it yet :) hoping to do some wspr with it
[21:22] <GW8RAK> There's an article in the Amsat magazine about the Funcube dongle.
[21:22] <GW8RAK> Which looks quite interesting.
[21:23] <Laurenceb_> http://www.sdr-cube.com/
[21:23] <Laurenceb_> wow
[21:23] <Laurenceb_> some seriously nice stuff
[21:24] <GW8RAK> I was looking at that yesterday. Looks nice.
[21:24] <GW8RAK> But I think I'd have to use someone else's software as my skills aren't up to that level of programming
[21:25] <GW8RAK> The Funcube info is 60MHz to 1.7GHZ with 96KHz bandwidth
[21:26] <GW8RAK> and 100 units being produced.
[21:26] <Laurenceb_> funcube?
[21:26] <fsphil> they sold out instantly I think
[21:27] <GW8RAK> Doesn't surprise me.
[21:27] <fsphil> it's a nice price point -- good coverage, and not stupid expensive like the usrp
[21:29] <Laurenceb_> link?
[21:29] <GW8RAK> www.funcubedongle.com
[21:29] <fsphil> http://www.funcubedongle.com/
[21:29] <GW8RAK> Got there first phil
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[21:31] <Laurenceb_> oh wow
[21:31] <fsphil> might be a good project for the summer
[21:31] <Laurenceb_> i was tihnking something like that should be possible last year
[21:31] <Laurenceb_> but couldnt see how to get current draw down
[21:31] <Laurenceb_> cc1020 looked a better bet
[21:32] <Laurenceb_> is there a schematic?
[21:34] <GW8RAK> The assembly video is boring, but I like the solder paste melting. I'll have to see if that is feasible for the DDS module.
[21:36] <Laurenceb_> "To keep costs down, inside the FUNcube Dongle we are using a hjighly integrated device that is subject to a non-disclosure agreement and thus I am afraid that the schematics arent publicly available"
[21:36] <Laurenceb_> bah
[21:37] <fsphil> embed it in the antenna with a small pre-amp, just a usb cable going up to it :)
[21:38] <Laurenceb_> http://www.funcubedongle.com/wp-content/uploads/2010/12/P1010470.jpg
[21:38] <Laurenceb_> whats the name on the rhs ic ?
[21:39] Action: Elwell managed to get one of the 2nd batch
[21:39] <Elwell> not yet arrived
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[21:42] <Laurenceb_> vptonics or something
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[21:43] <Elwell> its the ADC apparently (http://www.funcubedongle.com/?p=155#comment-223)
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[21:45] <Laurenceb_> thatd be the middle one
[21:45] <Laurenceb_> apparently the front end is some sort of integrated pll + quadrature mixer
[21:46] <Elwell> I plan to use mine for sat tracking n various other stuff
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[22:53] <Laurenceb_> im amazed by the frequency range
[22:53] <Laurenceb_> thats some pretty impressive hardware on the front end.. id be slightly worried about harmonics on the vco
[22:54] <Laurenceb_> AD did have a fully integrated front end IC with similar specs, but it was very power hungry and appeared to suffer due to hardmonics on the VCO
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[23:15] <Laurenceb_> looks like its a DVBT receiver ic from "pionics?"
[23:15] <kylehotchkiss> Any nice GFS graph applications for OS X that y'all know about?
[23:15] <Laurenceb_> im really suprised it does that massive range
[23:15] <Laurenceb_> dunno sorry
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[00:00] --- Fri Jan 7 2011