highaltitude.log.20180318

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[01:12] <SpacenearUS> New vehicle on the map: 03RS_N1040194 - 12https://tracker.habhub.org/#!qm=All&q=RS_N1040194
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[03:18] <drohan> For an antenna like http://fpvpro.com/12-13-ghz-video-transmitter-antenna-30-cm-super-flexible-coax-extension , is it possible to calculate or determine the gain it would give? Would it vary per antenna, or is it standard?
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[03:32] <SpacenearUS> New position from 03U3B-14 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U3B-14
[03:49] <drohan> Also - Looking @ http://www.hamtv.com/info.html#balloon, do you think one could realistically get a live ATV downlink in the 434 MHz / 70cm band?
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[04:54] <tweetBot> @darksidelemm: @vk4tec If you understood the huge effort by the #ukhas group into building and keeping HabHub/Habitat operational,& https://t.co/ga8MmDHEYk
[05:02] <Ian_> A cursory read up about dipole antennas, the example given by drohan, will reveal that it probably has a gain of 2.1dB relative to an isotropic radiator. Most pucker vendors give a gain figure when advertising their wares. Normally stated as dBi for most 1/4W and dBD for yagis etc.
[05:02] <Darkside> its odd isnt it
[05:02] <Darkside> why not just use dBi everywhere?
[05:03] <Ian_> Unscrupulous - they exist - vendors will often state a dBi figure with no attribution
[05:03] <Ian_> Yep, shame he wants you to do all the work Mark, it's probably for a thesis :)
[05:04] <Ian_> UKHAS Homework channel
[05:04] <Ian_> Good tweet by the way
[05:04] <Darkside> i'm slightly less jaded Ian_ :P
[05:04] <Darkside> Ian_: ahh you've followed that thread
[05:05] <Ian_> Like yourself, I'm fairly persistent here. Not so bright of course!
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[05:41] <SpacenearUS> New vehicle on the map: 03RS_N4620757 - 12https://tracker.habhub.org/#!qm=All&q=RS_N4620757
[07:14] <SpacenearUS> New vehicle on the map: 03RS_P0220053 - 12https://tracker.habhub.org/#!qm=All&q=RS_P0220053
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[07:43] <SpacenearUS> New vehicle on the map: 03RS_N2430761 - 12https://tracker.habhub.org/#!qm=All&q=RS_N2430761
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[07:57] <SpacenearUS> New vehicle on the map: 037_chase - 12https://tracker.habhub.org/#!qm=All&q=7_chase
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[09:19] <mybit> hi
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[09:51] <SpacenearUS> New position from 03BSS13 after 0319 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS13
[09:56] <mfa298> hello mybit
[09:56] Action: cm13g09_ throws snowball to mfa298
[09:56] Nick change: cm13g09_ -> cm13g09
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[10:10] Action: mfa298 would biuld a snowman with it, but might not be enough snow for that
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[10:12] <cm13g09> mfa298: there's enough down here for that
[10:12] <cm13g09> I've got about 3-4 inches on the grass and in the car park
[10:12] <craag> inches on the grass..
[10:13] <craag> less on tarmac here, and looking slushy
[10:13] <cm13g09> craag: It still stopped me from taking the shop to site today
[10:14] <mfa298> well the real reason against building snowmen is: it's cold outside
[10:14] <cm13g09> lol
[10:14] <cm13g09> that too!
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[10:18] <SpacenearUS> New vehicle on the map: 03spacetech2017 - 12https://tracker.habhub.org/#!qm=All&q=spacetech2017
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[10:22] <SpacenearUS> New position from 03RS_N1113555 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=RS_N1113555
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[11:20] <SpacenearUS> New vehicle on the map: 03RS_N2610544 - 12https://tracker.habhub.org/#!qm=All&q=RS_N2610544
[11:20] <SpacenearUS> New position from 03IV3SRD-11 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
[11:24] <SpacenearUS> New vehicle on the map: 03RS_N1253411 - 12https://tracker.habhub.org/#!qm=All&q=RS_N1253411
[11:25] <SpacenearUS> New vehicle on the map: 03RS_N2610608 - 12https://tracker.habhub.org/#!qm=All&q=RS_N2610608
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[12:29] <SpacenearUS> New position from 03FOOL1 after 0318 hours silence - 12https://tracker.habhub.org/#!qm=All&q=FOOL1
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[13:21] <SpacenearUS> New position from 03HB9HFJ-11 after 037 days silence - 12https://tracker.habhub.org/#!qm=All&q=HB9HFJ-11
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[14:13] <SpacenearUS> New vehicle on the map: 03W9YB-11 - 12https://tracker.habhub.org/#!qm=All&q=W9YB-11
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[14:30] <SpacenearUS> New vehicle on the map: 03KC9ZUY-7 - 12https://tracker.habhub.org/#!qm=All&q=KC9ZUY-7
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[16:37] <Ian_> it was interesting out last night - packed, freezing and drifting snow with hills - but there is a lot of hard ice out there at the moment. No slush to talk of.
[16:54] <SpacenearUS> New vehicle on the map: 037022839479_chase - 12https://tracker.habhub.org/#!qm=All&q=7022839479_chase
[16:55] <SpacenearUS> New vehicle on the map: 03KA02AB5319_chase - 12https://tracker.habhub.org/#!qm=All&q=KA02AB5319_chase
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[17:02] <fsphil> no snow here this time, it missed NI
[17:02] <fsphil> plenty of ice though
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[17:03] <Ian_> A mixed blessing I'm sure :)
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[17:11] <SpacenearUS> New vehicle on the map: 03RS_N1033723 - 12https://tracker.habhub.org/#!qm=All&q=RS_N1033723
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[17:35] <SpacenearUS> New position from 03SATIS3 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=SATIS3
[17:55] <SpacenearUS> New vehicle on the map: 03RS_P0220059 - 12https://tracker.habhub.org/#!qm=All&q=RS_P0220059
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[18:27] <SpacenearUS> New vehicle on the map: 03RS_M5023237 - 12https://tracker.habhub.org/#!qm=All&q=RS_M5023237
[18:30] <SpacenearUS> New vehicle on the map: 03RS_N103372s - 12https://tracker.habhub.org/#!qm=All&q=RS_N103372s
[18:35] <PE2BZ> I have a solar stpepup problem...
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[18:36] <PE2BZ> I have built the MSC1640 part of this diagram http://www.om3bc.com/docs/payload/payload_en.html
[18:36] <PE2BZ> MCP1640 that should be ;-)
[18:37] <PE2BZ> But when the sonde gets into clouds (or clouds get between the solar panels and the sun) my payload goes into an ¨unwanted modulation type¨ untill the power is completely gone. Sometimes it takes half an hour to have it restarted
[18:38] <PE2BZ> Anyone any thoughts on that ?
[18:48] Nick change: Kryczek_ -> Kryczek
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[19:04] <Jim__> I have a Habduino mounted on my car to test the tracking capability. I see the radio on aprs.fi but I can't see it on the habhub tracker. Call is ad4xx-11
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[19:21] <SpacenearUS> New vehicle on the map: 03BALTS2 - 12https://tracker.habhub.org/#!qm=All&q=BALTS2
[19:24] <Ian_> jim__ I believe that on #habhub you would have to ask for the call to be added to the APRS import
[19:24] <Ian_> to Habitat
[19:25] <Jim__> I looked for a link to 'sign up' but I've not found it. Is that on the habhub site or elsewhere?
[19:26] <LazyLeopard> In the #habhub channel here.
[19:31] <Jim__> I am unable to find where to add my callsign. I have looked here and on habhub.
[19:36] <craag> Hi Jim__, just post a message in the #habhub channel asking to be added. Click here -> #habhub
[19:37] <Jim__> THANKS! I just did. Now we'll see what happens.
[19:39] <craag> :) Might be a while until an admin stops by.
[19:40] <Jim__> That is fine. One more question. Will my callsign remain registered or is this something I need to do for each test/launch?
[19:45] <craag> They get cleared out every now and then I think, it's worth checking each time. You can do that with the command: .aprs
[19:45] <craag> eg.
[19:45] <craag> .aprs
[19:45] <SpacenearUS> 03craag: Tracking via APRS: 034Z7GUL-11 10(ILHAB), 03AD6AM-11 10(UBSEDS15), 03AD6AM-12 10(UBSEDS18), 03AD6AM-13 10(UBSEDS21), 03AD6AM-2 10(UBSEDS22), 03AD6AM-4 10(UBSEDS24), 03CMAKER-5, 03DK3SB-10, 03DK3SB-12, 03DK3SB-13, 03DK3SB-8, 03DL3AKB-11, 03DL4MDW-11, 03DL7AD-11, 03HABIL-1, 03ILHAB-2, 03ILHAB-3, 03K2BSA-11, 03K2BSA-12, 03K2JJI-11, 03K6RPT-11, 03K6STS-12, 03KC3BJG-11, 03KD0VJI-11
[19:45] <SpacenearUS> 03KG7VFC-11, 03KG7WFR-11, 03KI7CUX-11, 03KI7CUX-9 10(KI7CUX-11_chase), 03KI7NYA-11, 03KM6DYI-12, 03M0SBU-11 10(UBSEDS15), 03M0SBU-12 10(UBSEDS18), 03M0SBU-13 10(UBSEDS21), 03M0SBU-2 10(UBSEDS22), 03M0SBU-4 10(UBSEDS24), 03M0SBU-5 10(UBSEDS25), 03M0UPU-7, 03M0UPU-8, 03M0UPU-9, 03M1023118, 03M1143001, 03MIKEL, 03N6ARA-11, 03N6ARA-12, 03N7SMI-11, 03NA9VY-11, 03OK7DMT-10, 03OK7DMT-11, 03
[19:45] <SpacenearUS> -9, 03SP3OSJ-12, 03SP9UOB-10 10(SP9UOB), 03SP9UOB-11 10(SP9UOB-P28), 03VE3KCL-9, 03VE3KLX-11, 03VK2HAB-11, 03VK3YT-11, 03W7QO-7, 03W8MHS-11, 03WB8ELK-3, 03WB8ELK-6
[19:47] <Jim__> You've been most helpful. Thank you very much.
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[19:53] <Mike-SA6BSS> PE2BZ: the problem is usuly that those inductor based boost circiuts have a quite high startup current,
[19:54] <Mike-SA6BSS> what you can do is try delay the startup until there is enough power on the cells by play a little trick on with the enable pin of the mcp
[19:55] <PE2BZ> Hi Mike, I was thinking in the direction of adding a diode between + solar and the enable pin
[19:55] <Mike-SA6BSS> put a ca 100k ohm resistor from enable pin to gnd
[19:55] <Mike-SA6BSS> yes thats about it
[19:55] <Mike-SA6BSS> but you must keep it low with resistor
[19:55] <Mike-SA6BSS> and just put 2-3 1n4148 or similar i series
[19:55] <Mike-SA6BSS> from solar in to enable
[19:56] <Mike-SA6BSS> you have to play a little but I tried it on the mcp1640 and it did work with 2 or 3 diodes, cant remember which
[19:56] <Mike-SA6BSS> and a 80-130k ohm resistor
[19:57] <PE2BZ> for 3 solar panels I guess 3 diodes would be to much
[19:57] <Mike-SA6BSS> it the just smothly strats the circiut
[19:57] <PE2BZ> But the next week should be sunny :-)
[19:57] <Mike-SA6BSS> i´m using 4 or 5
[19:57] <Mike-SA6BSS> yeap, 3 probably to much
[19:58] <Mike-SA6BSS> * i´m using 4 or 5 solar cells
[19:58] <PE2BZ> I have it running tomorrow with 6 solar panels and without stepup so tomorrow evening I will wire the stepup back in and add the resistor and 2 diodes for testing.
[19:58] <PE2BZ> It´s on the roof now, with a 4 kg brick on it :-)
[19:59] <Mike-SA6BSS> good luck, let us know how it goes
[19:59] <PE2BZ> Thanks, I will !
[20:01] <PE2BZ> Wind will turn to SW next week so perhaps an actual flight might happen. 20 gram with 3 solar panels and stepup on experimental pcb.
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[20:02] <Mike-SA6BSS> nice :)
[20:02] <PE2BZ> One other question, how do you wire the balloon to the solar powered payload, without risking that the wire(s) will damage the solar panels ? I can solve my problem by housing the tracker into foam but that is half the weight of the complete setup
[20:03] <Mike-SA6BSS> hopefully my aprs tracker shouls have reached easter Rusia / asia tomorrom morning 5-6 hours from now
[20:03] <Mike-SA6BSS> lets see if I have a pic
[20:04] <PE2BZ> http://predict.habhub.org/#!/uuid=7382a687ccc408f827ed7346402181ca0a6febe6
[20:04] <PE2BZ> Now, where is the south western wind they promised ....
[20:05] <Mike-SA6BSS> a small trick to play with the predictor :)
[20:05] <Mike-SA6BSS> http://predict.habhub.org/#!/uuid=194430e6505ef0a3119c022002e810714b177b9b
[20:06] <PE2BZ> That´s nice !
[20:07] <PE2BZ> So I should consider Friday :-) http://predict.habhub.org/#!/uuid=7318b31a9a81fb834e1240583e1227266624f91e
[20:08] <Mike-SA6BSS> yes pls :) ages ago I had any habs come this way :)
[20:08] <Mike-SA6BSS> me and david (in stockhol) ready whenever !!
[20:09] <Mike-SA6BSS> https://imgur.com/vOklVPj
[20:09] <PE2BZ> No plans for next friday and off work at 13:00 local time
[20:09] <PE2BZ> So if the prediction keeps this way :-)
[20:10] <Mike-SA6BSS> I solder a small hock to the gnd and just tie a fishingline in the hock
[20:11] <Mike-SA6BSS> Im using a simlple dipole 49cm gnd at the top and a 49cm radiating string at the bottom
[20:11] <Mike-SA6BSS> https://imgur.com/fPoPzyg
[20:11] <PE2BZ> thanks for the image Mike. I will work something out like that. 49 cm is for 2 meter aprs ?
[20:12] <Mike-SA6BSS> yep, 2m aprs and rtty
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[20:12] <Mike-SA6BSS> the tracker I ssnet up last week does both
[20:12] <PE2BZ> I will go for 70 cm, Lora and rtty
[20:13] <PE2BZ> But I will let you know before the flight :-)
[20:13] <PE2BZ> Afk for now. Thanks again !
[20:13] <Mike-SA6BSS> :) l8er!!
[20:14] <Mike-SA6BSS> a side note by soldering the top wire in you will be able to balance the board by bending the wire so the solar cells is leveled for maximum solar input
[20:42] <G8KNN_>
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[21:48] <SpacenearUS> New vehicle on the map: 03SQ3KNO - 12https://tracker.habhub.org/#!qm=All&q=SQ3KNO
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[21:55] <SpacenearUS> New vehicle on the map: 03AD4XX-11 - 12https://tracker.habhub.org/#!qm=All&q=AD4XX-11
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[22:13] <morxa> Hello, I'm interested in seeing tomorrow's launch at Milton Keynes, and just wanted to confirm if it is still having place at Broughton Fields Primary School?
[22:18] <Darkside> probably best to e-mail the ukhas mailing list
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[22:24] <morxa> ok thanks
[22:25] <fsphil> or the organiser directly, if you have their details
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[22:49] <SpacenearUS> New vehicle on the map: 03SQ3KNO_chase - 12https://tracker.habhub.org/#!qm=All&q=SQ3KNO_chase
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[23:03] <gonzo_> if it's a school, you prob can't just turn up. would have to be by invite
[23:05] <SpacenearUS> New vehicle on the map: 03AD4XX-12 - 12https://tracker.habhub.org/#!qm=All&q=AD4XX-12
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[23:18] <SpacenearUS> New vehicle on the map: 03RS_N1740023 - 12https://tracker.habhub.org/#!qm=All&q=RS_N1740023
[23:19] <SpacenearUS> New vehicle on the map: 03RS_N1253388 - 12https://tracker.habhub.org/#!qm=All&q=RS_N1253388
[23:21] <SpacenearUS> New vehicle on the map: 03RS_N3710597 - 12https://tracker.habhub.org/#!qm=All&q=RS_N3710597
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[23:42] <SpacenearUS> New vehicle on the map: 03RS_N2610607 - 12https://tracker.habhub.org/#!qm=All&q=RS_N2610607
[23:46] <SpacenearUS> New vehicle on the map: 03RS_P0220052 - 12https://tracker.habhub.org/#!qm=All&q=RS_P0220052
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[23:56] <SpacenearUS> New vehicle on the map: 03RS_N1040125 - 12https://tracker.habhub.org/#!qm=All&q=RS_N1040125
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[00:00] --- Mon Mar 19 2018