highaltitude.log.20220406

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[00:08] <SpacenearUS> New position from 03W5KUB-110 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W5KUB-110
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[06:41] <SpacenearUS> New position from 03NOB9 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NOB9
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[09:09] <SpacenearUS> New position from 03NOB11 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NOB11
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[09:28] <SpacenearUS> New position from 03SA6BSS-7 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=SA6BSS-7
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[10:01] <michal_f> hey! what happened to spacenear.us ?
[10:04] <VK5QI> the spacenear.us domain is gone
[10:05] <VK5QI> services that were on there are now on https://legacy-snus.habhub.org/
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[10:27] <michal_f> merci !
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[15:33] <SpacenearUS> New vehicle on the map: 03SQ3XBD-4FSK - 12https://tracker.habhub.org/#!qm=All&q=SQ3XBD-4FSK
[15:50] <SpacenearUS> New vehicle on the map: 03KN6SPE-V2 - 12https://tracker.habhub.org/#!qm=All&q=KN6SPE-V2
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[16:33] <SpacenearUS> New vehicle on the map: 03SQ3XBD-12 - 12https://tracker.habhub.org/#!qm=All&q=SQ3XBD-12
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[16:57] <SpacenearUS> New position from 03BSS43 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS43
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[17:33] <ly2en> is it okay to use smaller chinese solar cells 0.5v each and stack them up to create 5V voltage ?
[17:33] <ly2en> the voltage drops anyway to something like 3.5 and low current doesn't hurt the si5351
[17:34] <ly2en> i'm trying to find the best weight/voltage ratio
[17:34] <ly2en> (without using a LDO)
[17:34] <SA6BSS-Mike> 6 cells gets you close to to 3,8 or so, no ldo needed
[17:35] <ly2en> testing 6 cells now it gives 3V (6x0.5)
[17:35] <ly2en> and with load, it goes down close to BOD
[17:35] <SA6BSS-Mike> but that cant be under real sunlight?
[17:35] <SA6BSS-Mike> I use it all the time
[17:35] <ly2en> interesting
[17:35] <SA6BSS-Mike> thats basicaly all I use
[17:36] <SA6BSS-Mike> and have done on the last 30-40 flights
[17:36] <SA6BSS-Mike> whats the size of the ells?
[17:36] <ly2en> maybe I need to test more, but here I had to stack up 8 cells like yours to get 4V
[17:36] <SA6BSS-Mike> cells*
[17:36] <ly2en> and then it dropped to something 3-ish
[17:36] <SA6BSS-Mike> one bad cell?
[17:37] <ly2en> https://pasteboard.co/b7kmF5pQbP2h.png <- today tested with 10x smaller cells, I guess these are 32x32 0.5V each
[17:37] <SA6BSS-Mike> not easy but try messure the voltage acorss each cell
[17:37] <ly2en> maybe some of them get dirty from the flux
[17:37] <SA6BSS-Mike> no
[17:38] <SA6BSS-Mike> onlt few % of the capacety impact
[17:39] <ly2en> there was a bit of sun and then again 3 days of light snow here
[17:39] <SA6BSS-Mike> do you have a halogen lamp to emulate sun indoor?
[17:39] <ly2en> i will get one, good idea
[17:39] <SA6BSS-Mike> then get a 400W Halogen
[17:39] <ly2en> normally i have a strong magnifying lamp for soldering but it's leds
[17:39] <SA6BSS-Mike> they are like 15Euro or so
[17:39] <ly2en> yeah super cheap
[17:40] <SA6BSS-Mike> by the way, balloon on the way ,put in box yesterday
[17:41] <SA6BSS-Mike> this looks more or less just like the one Im using https://oelighting.en.made-in-china.com/product/POyJmHpxJDcV/China-400W-Halogen-Flood-Light.html
[17:42] <SA6BSS-Mike> you will find in any closeby hardware store, make sure you get the Halogen type and not the LED type
[17:43] <SA6BSS-Mike> works fine from quite a distance https://imgur.com/laW22Kt
[17:43] <SA6BSS-Mike> https://imgur.com/8fvAiWF
[17:45] <ly2en> I think I even have one somewhere at the clubstation
[17:45] <SA6BSS-Mike> many have
[17:46] <SA6BSS-Mike> mine is 400W 8545lm
[17:47] <SA6BSS-Mike> BSS43now near north pole at the moment tx from and to about 2° solar with 6psc of small 13x52 cells
[17:47] <SA6BSS-Mike> with a small tilt towards the south
[17:47] <ly2en> okay it sounds convincing, I will do more testing
[17:48] <ly2en> LY5ZZ was a supercap and thin solar film combo for lightaprs-w
[17:48] <ly2en> more like a demo flight
[17:48] <ly2en> now it's time to put some hands to work
[17:49] <SA6BSS-Mike> dont like the thinfilm, way to low output and the need for heavy SC to work , as well as expensive cells
[17:49] <SA6BSS-Mike> any cells that are not facing the sun will block, 0,6V from the array
[17:49] <SA6BSS-Mike> so its very omportent they are all aligned well
[17:50] <SA6BSS-Mike> as in you loose 1,2V if they are not aligned
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[19:44] <SpacenearUS> New vehicle on the map: 03KC3SGV - 12https://tracker.habhub.org/#!qm=All&q=KC3SGV
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[21:15] <SpacenearUS> New position from 03W5KUB-110 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W5KUB-110
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[00:00] --- Thu Apr 7 2022