highaltitude.log.20170302

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[02:33] <SpacenearUS> New vehicle on the map: 03VE2WMG-11 - 12https://tracker.habhub.org/#!qm=All&q=VE2WMG-11
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[02:51] <SpacenearUS> New position from 03HIRFW-6 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=HIRFW-6
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[06:18] VE6AZX (603380a5@gateway/web/freenode/ip.96.51.128.165) joined #highaltitude.
[06:18] <VE6AZX> If anyone has a minute, I'd love some feedback on an idea I had the other day.
[06:19] <VE6AZX> Basically, I was wondering what would happen if I made a big bubble of really thin mylar, the 1 or 2 mil stuff that weighs ~10g per m^2
[06:19] <VE6AZX> inflated a kaymont 1600 inside, in the way that we usually make "floater" balloons from the big latex ones
[06:19] <VE6AZX> and during the ascent allowed it to fill the mylar "umbrella"
[06:20] <VE6AZX> would such a contraption last longer than usual, being shielded from a lot of the UV?
[06:20] <VE6AZX> or is there a practical / theoretical reason this shouldn't work?
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[07:08] <SpacenearUS> New position from 03HELLAS after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=HELLAS
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[07:24] <PE2BZ> !flights
[07:24] <SpacenearUS> 03PE2BZ: Current flights: 03Kingsfold190 10(9ea8), 03UBSEDS18 434.612.5 CONTESTIA 16/1000 10(64a5), 03UBSEDS21 434.610 CONTESTIA 16/1000 10(2e88)
[07:31] <VE6AZX> Is there a way to put vehicles on the map? Does one submit them?
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[07:41] <Vaizki> you mean the balloons in the habhub tracker map? Or chase car icons?
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[07:43] <VE6AZX> the habhub map
[07:44] <SA6BSS-Mike> on your first balloon qustion I don beleve it been done
[07:44] <SA6BSS-Mike> but it sounds plausible
[07:44] <VE6AZX> oh?
[07:44] <SA6BSS-Mike> taht it should last for longer
[07:44] <VE6AZX> That's encouraging!
[07:45] <VE6AZX> if you have a second for another question - I'd like to test this with a *smaller* latex balloon a few times - with a suitably light payload, is it possible to make a kaymont 600 or 1000 float?
[07:45] <SpeedEvil> VE6AZX: what is your source of the 1 or 2um stuff?
[07:45] <SA6BSS-Mike> getting a car on the map I´m not sure, I think one way is to download the chase car app from playstore
[07:45] <SpeedEvil> VE6AZX: float altitude just goes down
[07:45] <VE6AZX> SpeedEvil: not sure yet, but I did see that you could buy it on alibaba
[07:45] <VE6AZX> SpeedEvil - understood.
[07:45] <SpacenearUS> New position from 03HORUSLORA1 after 034 days silence - 12https://tracker.habhub.org/#!qm=All&q=HORUSLORA1
[07:46] <VE6AZX> The calculator on habhub notes a possible floater for specific balloons, but I imagine when it reports a crazy-long ascent time it's basically the same thing
[07:46] <SA6BSS-Mike> https://play.google.com/store/apps/details?id=com.pexat.habhub.chasecartracker&hl=sv
[07:47] <VE6AZX> Mike - looks awesome, thanks
[07:48] <SA6BSS-Mike> getting a balloon on the map just make a payload configuration documents and upload and your on the map http://habitat.habhub.org/genpayload/
[07:48] <SA6BSS-Mike> upload goes through dl-fldigi in hab mode
[07:49] <SA6BSS-Mike> and a radio
[07:49] <VE6AZX> got it - thanks. This seems to be a pretty active community and I'd love to be a part of it.
[07:49] <VE6AZX> such a thing does not seem to exist where I am in canada.
[07:50] <SA6BSS-Mike> there is one quite active balloonist , ve3kcl you can see he´s prepping his 22 balloon on the tracker page
[07:52] <VE6AZX> perhaps I ought to see if I can get in contact
[07:53] <SA6BSS-Mike> I have his mail adress, pm me if u want it
[07:53] <SA6BSS-Mike> you can see all his S flight here http://www.qrp-labs.com/flights.html
[07:54] <VE6AZX> ah right, he is the one using WSPR for tracking and telemetry, yes, I've seen his work
[07:54] <VE6AZX> it is impressive.
[07:55] <SA6BSS-Mike> yep, that him
[07:55] <VE6AZX> now
[07:55] <VE6AZX> I was wondering what his payloads weigh in at
[07:55] <VE6AZX> ... lemme see.
[07:55] <SA6BSS-Mike> latest is 10grams
[07:55] <VE6AZX> 10g, I see.
[07:55] <VE6AZX> they look heavier in the pictures
[07:55] <VE6AZX> with the pink insulation
[07:56] <SA6BSS-Mike> it does, but the inslatio on his lates just there to cary the solar panels
[07:56] <VE6AZX> and it looks like he is powering right from the panels - no battery
[07:57] <VE6AZX> unless I'm missing it
[07:57] <SA6BSS-Mike> thats right
[07:58] <SA6BSS-Mike> most floater does that, hard charging a battery at -10-20 deg
[07:58] <VE6AZX> makes me reconsider the radio I'm using - draws too much power, the DRA818V takes ~750 mA during transmit at 4.5 volts or so
[07:58] <VE6AZX> right, that makes sense
[07:58] <SA6BSS-Mike> we are using si5351 on the wspr flights
[07:58] <VE6AZX> any filtering?
[07:59] <VE6AZX> been wondering if it matters much at such low power
[08:00] <SA6BSS-Mike> dont now about dave, i have skiped it as its low power15-20mW mostly over rural areas
[08:01] <VE6AZX> that's what I figured would be reasonable
[08:01] <VE6AZX> I wanted to do it but get tripped up on making light filters
[08:01] <VE6AZX> inductors are heavy... and active filters with op-amps are hard.
[08:02] <SA6BSS-Mike> made a filter for on my first pcb but never used it, one can make a 3 pole filter
[08:02] <SA6BSS-Mike> using smd inductor is not heavy :)
[08:03] <VE6AZX> I couldn't find smd inductors at the right values.. perhaps was looking in the wrong place.
[08:03] <VE6AZX> but I think I get it.
[08:04] <VE6AZX> cool stuff, this. kind of addictive
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[08:05] <VE6AZX> if I had more $$$ I'd probably just spend it on more of this stuff
[08:05] <VE6AZX> haha
[08:05] <SA6BSS-Mike> its not that expensice, but ofc if u looking at the latex balloons it can be
[08:06] <VE6AZX> yeah, the 1000g look like 50 usd / each typically
[08:06] <SA6BSS-Mike> pic of my latest wspr tracker http://imgur.com/a/gHx4Q
[08:07] <SA6BSS-Mike> breaking of the pinhed its about 3grams
[08:07] <VE6AZX> tiny and awesome
[08:07] <VE6AZX> that's really cool
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[08:08] Nick change: AndyEsse1 -> AndyEsser
[08:09] <VE6AZX> hey, thanks for answering my questions - appreciate it. I've got to head off for now, but I'll be around later. 73!
[08:10] <SA6BSS-Mike> 73
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[08:50] <SpacenearUS> New vehicle on the map: 03HORUS - 12https://tracker.habhub.org/#!qm=All&q=HORUS
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[09:00] <gonzo_> did the WESTG balloon tracker ever come back online?
[09:03] <PE2BZ> Not over here in Holland.
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[09:06] <gonzo_> saw it go to carrier. Drifted out of range (or was it, interest?) for me.
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[10:35] <AndyEsser> shame ESOC don't give tours on Saturdays :(
[10:35] <AndyEsser> Darmstadt is only just outside Frankfurt where I'm going this weekend
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[11:19] <PE2BZ> gonzo_ it was still out of reach for me when it stopped on habmap, about one hour later I indeed had a single carrier but stable signal and this morning there was no signal. Not between 434 and 435 MHz at least .
[11:20] <gonzo_> no info on what the payload was. But would be supprides if it had more than 12hrs battery
[11:21] <fsphil> I'm curious about the apparent second launch, why they thought that one would work better
[11:21] <PE2BZ> fsphil on which frequency would that have been ?
[11:22] <fsphil> someone mentioned 434.275
[11:23] <gonzo_> they planned two?
[11:23] <fsphil> possibly
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[11:56] <SpacenearUS> New position from 03RSIST after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=RSIST
[12:16] <pb0ahx> !flights
[12:16] <SpacenearUS> 03pb0ahx: Current flights: 03Kingsfold190 10(9ea8), 03UBSEDS18 434.612.5 CONTESTIA 16/1000 10(64a5), 03UBSEDS21 434.610 CONTESTIA 16/1000 10(2e88)
[12:24] <SpacenearUS> New vehicle on the map: 03X7 - 12https://tracker.habhub.org/#!qm=All&q=X7
[12:25] Nick change: pb0ahx -> PB0AHX
[12:26] Nick change: en4rab_ -> en4rab
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[13:03] <SpacenearUS> New vehicle on the map: 03K1AMO - 12https://tracker.habhub.org/#!qm=All&q=K1AMO
[13:04] <SpacenearUS> New vehicle on the map: 03SKYGATE_chase - 12https://tracker.habhub.org/#!qm=All&q=SKYGATE_chase
[13:20] <SpacenearUS> New vehicle on the map: 03PIPARTY - 12https://tracker.habhub.org/#!qm=All&q=PIPARTY
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[14:12] <SpacenearUS> New position from 03AC6MH-11 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=AC6MH-11
[14:22] <SpacenearUS> New position from 03HELLAS after 036 hours silence - 12https://tracker.habhub.org/#!qm=All&q=HELLAS
[14:26] <SpacenearUS> New vehicle on the map: 03TA4AEI-15_chase - 12https://tracker.habhub.org/#!qm=All&q=TA4AEI-15_chase
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[15:39] <SpacenearUS> New position from 03PYSKY2 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=PYSKY2
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[16:34] <SpacenearUS> New vehicle on the map: 03BARC3 - 12https://tracker.habhub.org/#!qm=All&q=BARC3
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[18:44] <SpacenearUS> New vehicle on the map: 03HYRST - 12https://tracker.habhub.org/#!qm=All&q=HYRST
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[21:47] <Babs> Evening chaps - on the assumption i need two antennas on Stabilotron-II (don't ask) is there any issue with putting a splitter on the SMA connector like this http://www.ebay.co.uk/itm/Female-to-Two-Male-RP-SMA-T-Triple-Adapter-Connector-3-way-Splitter-/182265350787?hash=item2a6fdc8a83:g:-50AAOSwknJXzuZT onto the connector on my tracker board and running two separate pigtails from it?
[21:47] <Babs> Thanks
[21:48] <Babs> I can't think of any outside of maybe either 1/2 the power or double the current draw
[21:48] <adamgreig> yea going to have to ask why you need two antennas
[21:48] <adamgreig> and what you hope to gain from this
[21:48] <adamgreig> the best case is each antenna gets 1/2 the power
[21:48] <adamgreig> worst case is neither antenna gets much of anything
[21:49] <Babs> So the antenna will sit on the one side of the package
[21:49] <Babs> package/payload
[21:49] <Babs> there's quite a bit of carbon fibre in the payload
[21:49] <adamgreig> (also bear in mind your ebay link is to an RP-SMA adapter which is almost certainly not what you want and won't mate with normal SMA)
[21:50] <Babs> and given its going to hopefully point in one direction i'm trying to avoid the potential for it to only putting out a signal on one side (the other side being shielded)
[21:51] <Babs> I'm likely to be the only person tracking it, so don't have a 360 line of sight to it
[21:51] <russss> a T adaptor is not a good power splitter
[21:51] <adamgreig> can you not do the normal thing of having the antenna on the bottom so its ground footprint is mostly omnidirectional?
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[21:53] <Babs> no, the camera is in the way https://www.flickr.com/photos/91049302@N00/32598276402/in/album-72157636929911016/
[21:53] <SA6BSS-Mike> Babs:you can use the splitter and maching it like this http://ham.stackexchange.com/questions/6200/3-way-coax-split-impedance-match
[21:54] <Babs> i think it unlikely that a) it won't rotate a little (there should be some contra rotating from the camera) and b) I'm going to be under it most of the time anyway so it should be fine
[21:54] <adamgreig> good looking payload
[21:54] <adamgreig> don't think that's even close to enough CF inside to be that worried about it shadowing
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[21:55] <Babs> good plan SA6BSS-Mike
[21:55] <adamgreig> I'd be more concerned about how a quarter wave whip pointing sideways out one side already has a complete null along its axis
[21:55] <adamgreig> maybe you could put the antenna ground radials at the top of the payload and the centre element run down one side
[21:55] <adamgreig> rather than having it near the bottom at all
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[22:02] <Babs> going to mount it like this https://www.flickr.com/photos/91049302@N00/33057699452/in/album-72157636929911016/
[22:03] <Babs> I was just thinking maybe it needs another one on the other side
[22:03] <adamgreig> that seems fine tbh
[22:03] <Babs> cool. I'll take that.
[22:04] <adamgreig> if you can mount the driven element further out from the main body, so much the better
[22:04] <adamgreig> e.g. if the radial that's in the east position on that image was sturdy and you could mount its end on the box instead
[22:04] <Babs> agreed.
[22:04] <adamgreig> but given the foam between the antenna and the insides, it's probably fine as is
[22:05] <Babs> I reckon the launch will be quite complex so keeping it neat and tidy would probably be the best option
[22:06] <Babs> I have a spot tracker that I've taken apart and mounted on a self levelling gimbal in there as a back up too
[22:06] <adamgreig> cool
[22:06] <Babs> wouldn't be much good until its back on the ground but it provides a useful back up
[22:06] <Babs> the thing is all basically completed now, i need to spend some time getting the PID settings on the stabilisation board working
[22:07] <adamgreig> cool
[22:07] <Babs> and then work out what PPM signal i need to put into it to correspond to the bearing it needs to be pointing on
[22:07] <adamgreig> and with months to go!
[22:07] <Babs> but that should be it
[22:07] <adamgreig> nice
[22:07] <Babs> I give it a max 20% chance of it all working nonetheless
[22:08] <Babs> its going to be great getting all those wires through airport security
[22:09] <SpacenearUS> New vehicle on the map: 03OM5078-12 - 12https://tracker.habhub.org/#!qm=All&q=OM5078-12
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[23:39] <SpacenearUS> New position from 03RSIST after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=RSIST
[00:00] --- Fri Mar 3 2017